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  • 75-20-7 Structure
  • Basic information

    1. Product Name: Calcium carbide
    2. Synonyms: carburedecalcium(french);carburocalcico;ethyne,calciumderiv;Acetylenogen;ELECTROLITE;CALCIUM CARBIDE;CALCIUM ACETYLIDE;Calciumcarbidemetallurggradegreylumpsmm
    3. CAS NO:75-20-7
    4. Molecular Formula: C2*Ca
    5. Molecular Weight: 64.1
    6. EINECS: 200-848-3
    7. Product Categories: Inorganics;Carbides;Ceramics;Metal and Ceramic Science;Non metallic mineral;inorganic chemical raw material
    8. Mol File: 75-20-7.mol
    9. Article Data: 5
  • Chemical Properties

    1. Melting Point: 447°C
    2. Boiling Point: 2300°C
    3. Flash Point: N/A
    4. Appearance: Gray-black/pieces
    5. Density: 2.22 g/mL at 25 °C(lit.)
    6. Refractive Index: N/A
    7. Storage Temp.: water-free area
    8. Solubility: N/A
    9. Water Solubility: hydrolyses
    10. Sensitive: Moisture Sensitive
    11. Stability: Stability Reacts violently with water liberating highly flammable gas (acetylene). Do not use water if this material is involved
    12. Merck: 14,1656
    13. BRN: 3909011
    14. CAS DataBase Reference: Calcium carbide(CAS DataBase Reference)
    15. NIST Chemistry Reference: Calcium carbide(75-20-7)
    16. EPA Substance Registry System: Calcium carbide(75-20-7)
  • Safety Data

    1. Hazard Codes: F
    2. Statements: 15-41-37/38
    3. Safety Statements: 8-43-43A-39-26
    4. RIDADR: UN 1402 4.3/PG 2
    5. WGK Germany: 1
    6. RTECS:
    7. F: 10-21
    8. TSCA: Yes
    9. HazardClass: 4.3
    10. PackingGroup: II
    11. Hazardous Substances Data: 75-20-7(Hazardous Substances Data)

75-20-7 Usage

Description

Calcium carbide (CaC2) is a grayish-black hard solid with a garlic-like odor, produced from the chemical processing of limestone. It is an important chemical raw material, known for its ability to react with water to produce acetylene gas, calcium hydroxide, and release heat. Calcium carbide is used in various industries due to its unique properties and reactions.

Uses

1. Chemical manufacture:
Calcium carbide is used as a raw material for the production of acetylene gas, calcium cyanamide, and various acetylene derivatives.
It is also used in the production of calcium hydroxide.
2. Steel production:
In the steel industry, calcium carbide is used as a desulfurization agent for producing low-sulfur carbon steel.
It serves as a fuel in steelmaking and a powerful deoxidizer.
3. Mining, automobiles, and street lighting:
Calcium carbide is used in carbide lamps, providing a continuous acetylene flame for illumination in coal mines and other applications.
4. Fruit industry:
It is used for artificial ripening of fruit, utilizing the acetylene gas produced from its reaction with water.
5. Signal flares:
Calcium carbide is used in combination with calcium phosphide to create floating, self-igniting naval signal flares.
6. Cylinder gas:
It serves as a source of acetylene gas for metal fabrication and construction industries.
7. Experiment teaching:
Calcium carbide is used as a teaching reagent in experimental settings.

Reaction with water

Calcium carbide will immediately have reaction upon coming across with water, generating acetylene and calcium hydroxide, which is the approach of industrial preparation of acetylene (carbide method), the reaction equation is: CaC2 + 2H2O = C2H2 + Ca (OH) 2. Since the impurity of calcium carbide, the generated acetylene gas is usually mixed with a small amount of hydrogen sulfide, phosphine gas and other contaminants, so there is a bad smell. Calcium carbide is produced from the lime and coke in an electric furnace at a high temperature of 3000 ℃: 3C + CaO = CaC2 + CO. Upon the laboratory preparation of acetylene, owing to the reaction between calcium carbide and water is very fierce, we can apply saturated brine to substitute water so that a pure and smooth airflow of acetylene can be obtained. Calcium carbide won’t have reaction with sodium chloride.

Production method

Electric furnace reduction method is the only method for industrial production of calcium carbide at present. Put calcium oxide and coke for reduction reaction at 2000~2200 ℃: CaO + 3C─ → CaC2 + CO-480644.64J, the resulting molten calcium carbide flow into the receiver tank from the bottom of the reactor, and we obtain the final product after cooling. Calcium carbide production belongs to high temperature operation with relative large amount dust being produced and consuming a large amount of electrical energy. In 1980s, the production of per ton of calcium carbide consumes industrial power of about 10~11GJ. In order to reduce the power consumption, people mostly apply large-scale and closed calcium carbide furnace to reduce heat loss and also do good to the recycling of carbon monoxide.

Preparation

Calcium carbide (CaC2) is manufactured by heating a lime and carbon mixture to 2000 to 2100°C (3632 to 3812°F) in an electric arc furnace. At those temperatures, the lime is reduced by carbon to calcium carbide and carbon monoxide (CO), according to the following reaction: CaO + 3C → CaC2 + CO Lime for the reaction is usually made by calcining limestone in a kiln at the plant site. The sources of carbon for the reaction are petroleum coke, metallurgical coke, and anthracite coal. Because impurities in the furnace charge remain in the calcium carbide product, the lime should contain no more than 0.5 percent each of magnesium oxide, aluminum oxide, and iron oxide, and 0.004 percent phosphorus. Also, the coke charge should be low in ash and sulfur. Analyses indicate that 0.2 to 1.0 percent ash and 5 to 6 percent sulfur are typical in petroleum coke. About 991 kilograms (kg) (2,185 pounds [lb]) of lime, 683 kg (1,506 lb) of coke, and 17 to 20 kg (37 to 44 lb) of electrode paste are required to produce 1 megagram (Mg) (2,205 lb) of calcium carbide.

Reactions

Calcium carbide is grayish-black solid, reacts with water yielding acetylene gas and calcium hydroxide, formed at electric furnace temperature from calcium oxide and carbon.

Air & Water Reactions

Reacts rapidly with water to generate the flammable gas acetylene and the base calcium hydroxide. Enough heat may be generated to ignite the gas [Jones, G.W. BM Report Invest. 3755 1944].

Reactivity Profile

Calcium carbide is a reducing agent. May react vigorously with oxidizing materials. The powdered mixture of the acetylide and iron oxide and iron chloride burns violently upon ignition, producing molten iron. Calcium carbide incandesces with chlorine, bromine, or iodine at 245, 350, or 305°C., respectively, [Mellor, 1946, Vol. 5, 862]. The carbide burns incandescently when mixed and heated with lead difluoride, magnesium, hydrogen chloride, and tin (II) chloride, [Mellor, 1946, 1940, 1946, and 1941], respectively. Interaction of Calcium carbide with methanol to give calcium methoxide is vigorous , but subject to an induction period of variable length. Once reaction starts, evolution of acetylene gas is very rapid, unpublished observations [Bretherick 1995]. Mixing Calcium carbide with silver nitrate solutions forms silver acetylide, a highly sensitive explosive. Copper salt solutions would behave similarly, [Photogr. Sci. Eng., 1966, 10, 334]. The mixture of Calcium carbide and sodium peroxide is explosive, as is Calcium carbide and perchloryl fluoride as gases at 100-300°C.

Hazard

Forms flammable and explosive gas and corrosive solid with moisture.

Health Hazard

It is a corrosive solid. Because it is highlywater-reactive, skin contact can cause burn.

Fire Hazard

Behavior in Fire: If wet by water, highly flammable acetylene gas is formed.

Safety Profile

Reaction on contact with moisture forms explosive acetylene gas. Flammable on contact with moisture, acid or acid fumes; evolves heat or flammable vapors. Moderate explosion hazard. Incandescent reaction with Cl2 (245℃), Brz (350℃), IS (305℃), HCl gas + heat, PbF2, Mg + heat. Incompatible with Se, (KOH + Ch), AgNO3, Na2O2, SnCl2, S, water. Mixtures with iron(IⅡ) chloride, iron(IⅡ) oxide, tin(Ⅱ) chloride are easily ignited and burn fiercely. Vigorous reaction with methanol after an induction period. Addttion to silver nitrate solutions precipitates the dangerously explosive silver acetylide. Copper salt solutions behave similarly. See also CALCIUM HYDROXIDE and ACETYLENE.

Check Digit Verification of cas no

The CAS Registry Mumber 75-20-7 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 7 and 5 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 75-20:
(4*7)+(3*5)+(2*2)+(1*0)=47
47 % 10 = 7
So 75-20-7 is a valid CAS Registry Number.
InChI:InChI=1/C2H2.Ca/c1-2;/h1-2H;/q;+2

75-20-7 Well-known Company Product Price

  • Brand
  • (Code)Product description
  • CAS number
  • Packaging
  • Price
  • Detail
  • Alfa Aesar

  • (14308)  Calcium carbide   

  • 75-20-7

  • 1kg

  • 446.0CNY

  • Detail
  • Alfa Aesar

  • (14308)  Calcium carbide   

  • 75-20-7

  • *5x1kg

  • 2225.0CNY

  • Detail
  • Aldrich

  • (270296)  Calciumcarbide  pieces, thickness <10 mm , typically, technical grade, ~80%

  • 75-20-7

  • 270296-500G

  • 492.57CNY

  • Detail
  • Aldrich

  • (270296)  Calciumcarbide  pieces, thickness <10 mm , typically, technical grade, ~80%

  • 75-20-7

  • 270296-2KG

  • 1,023.75CNY

  • Detail
  • Aldrich

  • (21039)  Calciumcarbide  granulated, technical, ≥75% (gas-volumetric)

  • 75-20-7

  • 21039-100G-F

  • 580.32CNY

  • Detail
  • Aldrich

  • (21039)  Calciumcarbide  granulated, technical, ≥75% (gas-volumetric)

  • 75-20-7

  • 21039-1KG-F

  • 1,123.20CNY

  • Detail

75-20-7SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 16, 2017

Revision Date: Aug 16, 2017

1.Identification

1.1 GHS Product identifier

Product name Calcium carbide

1.2 Other means of identification

Product number -
Other names calciumdicarbide

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Intermediates
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:75-20-7 SDS

75-20-7Synthetic route

calcium oxide

calcium oxide

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With biochars (apricot shell, willow or pine wood etc.) In neat (no solvent) Kinetics; reaction at 1650-1750 °C; detd. by XRD;97%
With sugar coal In neat (no solvent) heating CaO with sugar coal (1:3) at 1700°C, pressure about 100 Torr, during less 1 hour;; about 97% CaC2;;
With pyrographite In neat (no solvent) Electric Arc; from mixture of CaO and char coal powder; carbon electrodes, 12-14 A, 10-15 min; special app. described;;
calcium hydride
7789-78-8

calcium hydride

lithium
7439-93-2

lithium

pyrographite
7440-44-0

pyrographite

A

2Ca(2+)*Li(1+)*C3(4-)*H(1-)=Ca2LiC3H

2Ca(2+)*Li(1+)*C3(4-)*H(1-)=Ca2LiC3H

B

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In further solvent(s) acetylene carbon black reacted with CaCH2 in Ca/Li flux; sealed ampules heated to 1323 K in 2 h and kept at this temp. for 2 h; cooled to 1073 K in 24 h, cooled to 773 K in 108 h, centrifuged; elem. anal.;A 70%
B n/a
calcium chloride

calcium chloride

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With sodium In neat (no solvent) mixture of CaCl2, retort carbon and metallic Na in Fe crucible; 0.5 h at light red heat;;50%
With retort carbon; Na In neat (no solvent) mixture of CaCl2, retort carbon and metallic Na in Fe crucible; 0.5 h at light red heat;;50%
calcium cyanamide
156-62-7

calcium cyanamide

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With calcium sulfate at 1130 - 1250℃; im Vakuum; isomer(ic) II;
at 1100 - 1150℃; isomer(ic) III;
at 1130℃; zuletzt bei 1250-1300grad; isomer(ic) IV;
CaCN2

CaCN2

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
isomer(ic) IV;
carbon

carbon

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With hydrogen; calcium at 1150 - 1250℃;
With argon; calcium at 1150 - 1250℃;
carbon

carbon

CaO

CaO

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
isomer(ic) II;
sugar-coal

sugar-coal

calcium

calcium

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With nitrogen at 1050 - 1300℃; isomer(ic) II;
at 1050 - 1300℃; isomer(ic) III;
sugar-coal

sugar-coal

CaO

CaO

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With calcium sulfate at 1700℃; im Hochvakuum; isomer(ic) II;
at 1700℃; im Hochvakuum, dann in Stickstoff-Atmosphaere unter 30-120 mm bei 1250grad; isomer(ic) III;
at 1700℃; im Hochvakuum; isomer(ic) IV;
im elektrischen Ofen; isomer(ic) IV;
silicon carbide

silicon carbide

calcium oxide

calcium oxide

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In neat (no solvent) byproducts: Ca-silicide; at 1690-1740°C;;
In neat (no solvent) byproducts: Ca-silicide; at 1690-1740°C;;
In neat (no solvent)
aluminium carbide
1299-86-1

aluminium carbide

calcium
7440-70-2

calcium

A

calcium carbide
75-20-7

calcium carbide

B

aluminium
7429-90-5

aluminium

Conditions
ConditionsYield
at >845°C;
at >845°C;
calcium
7440-70-2

calcium

A

calcium carbide
75-20-7

calcium carbide

B

calcium oxide

calcium oxide

Conditions
ConditionsYield
With carbon dioxide
With CO2 by fast heating;
With CO2
calcium
7440-70-2

calcium

A

calcium carbide
75-20-7

calcium carbide

B

pyrographite
7440-44-0

pyrographite

C

calcium oxide

calcium oxide

Conditions
ConditionsYield
With CO2 by slow heating;
calcium
7440-70-2

calcium

A

calcium carbide
75-20-7

calcium carbide

B

calcium chloride

calcium chloride

Conditions
ConditionsYield
With tetrachloromethane burning in the presence of silica gel with excess of Ca after ignition with a mixture of CaSi2+KNO3;
With CCl4 burning in the presence of silica gel with excess of Ca after ignition with a mixture of CaSi2+KNO3;
calcium
7440-70-2

calcium

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With soot at red heat;
In neat (no solvent) liquid, heated Ca was treated with organic compounds;;
With char coal In neat (no solvent) burning heated pieces of Ca on char coal;;
calcium
7440-70-2

calcium

A

calcium carbide
75-20-7

calcium carbide

B

pyrographite
7440-44-0

pyrographite

Conditions
ConditionsYield
With CO at read heat;
With methane over dark red heat;
calcium benzylate

calcium benzylate

calcium
7440-70-2

calcium

A

calcium hydride
7789-78-8

calcium hydride

B

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
at dark red heat;
potassium thioacyanate
333-20-0

potassium thioacyanate

calcium
7440-70-2

calcium

A

calcium(II) sulfide

calcium(II) sulfide

B

calcium nitride

calcium nitride

C

calcium carbide
75-20-7

calcium carbide

D

pyrographite
7440-44-0

pyrographite

Conditions
ConditionsYield
at 300-400°C and 25 Torr with 50% conversion of Ca;
at 300-400°C and 25 Torr with 50% conversion of Ca;
ethene
74-85-1

ethene

calcium
7440-70-2

calcium

A

calcium carbide
75-20-7

calcium carbide

B

pyrographite
7440-44-0

pyrographite

Conditions
ConditionsYield
over dark red heat;
hexachlorobenzene
118-74-1

hexachlorobenzene

calcium
7440-70-2

calcium

A

calcium carbide
75-20-7

calcium carbide

B

calcium chloride

calcium chloride

Conditions
ConditionsYield
explosion after ignition with Mg;
explosion after ignition with Mg;
calcium
7440-70-2

calcium

pyrographite
7440-44-0

pyrographite

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
over red heat;
In neat (no solvent) 1.5 h heating in closed Fe crucible at 1150-1200°C;; 94% CaC2, 2% free carbon, small amts. of CaO and up to 2% impurities;;
In neat (no solvent) C (calcinated soot or calcinated, powdered petroleum coke); Fe crucible in resistance furnace under Ar: 825 Torr, 10-30 min, 1250°C and 3-6 Torr, 15 min, 1150°C; keep under N2 and P2O5 in desiccator;; melting at 2200°C, 750 Torr under Ar; product contains 90-93% CaC2, 2-4% graphite, up to 3% CaO and about 2% Fe and Al;;
calcium carbonate

calcium carbonate

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
With hydrogen In neat (no solvent) use of carbon and CaO from lime through reduction with H2;;
With aluminium In neat (no solvent) Electric Arc; under exclusion of air;;
With Sucrose In neat (no solvent) calcination;;
pyrographite
7440-44-0

pyrographite

calcium carbonate

calcium carbonate

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In neat (no solvent) byproducts: CaO, CO, CO2; Electric Arc; under heating, molar ratio carbonate:carbon=1:0.3, under Ar;
In neat (no solvent) description of dust control;;
With aluminum oxide In neat (no solvent) byproducts: Al; conducting the process; modification of pederson process: CaC2 as intermediate;;
ethene
74-85-1

ethene

calcium
7440-70-2

calcium

A

calcium hydride
7789-78-8

calcium hydride

B

calcium carbide
75-20-7

calcium carbide

C

pyrographite
7440-44-0

pyrographite

Conditions
ConditionsYield
In neat (no solvent) dark red heat; crust of CaC2, C and CaH2 inhibit reaction;;
In neat (no solvent) dark red heat; crust of CaC2, C and CaH2 inhibit reaction;;
calcium arsenide

calcium arsenide

pyrographite
7440-44-0

pyrographite

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In neat (no solvent) at very high temp.;;
calcium(II) sulfide

calcium(II) sulfide

pyrographite
7440-44-0

pyrographite

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In neat (no solvent) carbon forms in an electric furnace CaC2;;
diamond

diamond

calcium oxide

calcium oxide

A

carbon monoxide
201230-82-2

carbon monoxide

B

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In neat (no solvent) enthalpy of reaction given;;
methane
34557-54-5

methane

calcium oxide

calcium oxide

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In neat (no solvent) heating with methane;;
pyrographite
7440-44-0

pyrographite

calcium oxide

calcium oxide

calcium carbide
75-20-7

calcium carbide

Conditions
ConditionsYield
In neat (no solvent) in electrical furnace at 500 - 1500°C;;
With carbon dioxide; carbon monoxide; nitrogen In neat (no solvent) byproducts: NO; reaction with CO2 from lime;;
With silica gel; iron In neat (no solvent) byproducts: FeSi;
calcium carbide
75-20-7

calcium carbide

acetylene
74-86-2

acetylene

Conditions
ConditionsYield
With water Hydrolysis;100%
With water In water decompn.;;
With hydrogen In neat (no solvent) byproducts: Ca; at 2275°C pressure of H2 1 atm;;
4-hydroxybenzaldehyde 4-methylbenzenesulfonate ester
24962-55-8

4-hydroxybenzaldehyde 4-methylbenzenesulfonate ester

calcium carbide
75-20-7

calcium carbide

4,4'-(ethyne-1,2-diyl)bis(4,1-phenylene) bis(4-methylbenzenesulfonate)
1338725-51-1

4,4'-(ethyne-1,2-diyl)bis(4,1-phenylene) bis(4-methylbenzenesulfonate)

Conditions
ConditionsYield
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Sonogashira coupling; Inert atmosphere;99.4%
2-Iodothiophene
3437-95-4

2-Iodothiophene

calcium carbide
75-20-7

calcium carbide

1,2-di(thiophen-2-yl)ethyne
23975-15-7

1,2-di(thiophen-2-yl)ethyne

Conditions
ConditionsYield
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Sonogashira coupling; Inert atmosphere;99%
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Inert atmosphere;
4-Iodoacetophenone
13329-40-3

4-Iodoacetophenone

calcium carbide
75-20-7

calcium carbide

1,1'-[ethyne-1,2-diylbis(4,1-phenylene)]diethanone
29619-42-9

1,1'-[ethyne-1,2-diylbis(4,1-phenylene)]diethanone

Conditions
ConditionsYield
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Sonogashira coupling; Inert atmosphere;99%
3-Iodotoluene
625-95-6

3-Iodotoluene

calcium carbide
75-20-7

calcium carbide

bis(3-methylphenyl)acetylene
2765-16-4

bis(3-methylphenyl)acetylene

Conditions
ConditionsYield
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Sonogashira coupling; Inert atmosphere;99%
With copper(l) iodide; tetrakis(triphenylphosphine) palladium(0); water; triethylamine In N,N-dimethyl-formamide at 60℃; for 24h;
4-tolyl iodide
624-31-7

4-tolyl iodide

calcium carbide
75-20-7

calcium carbide

1,2-bis(4-methylphenyl)acetylene
2789-88-0

1,2-bis(4-methylphenyl)acetylene

Conditions
ConditionsYield
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Sonogashira coupling; Inert atmosphere;99%
With copper(l) iodide; tetrakis(triphenylphosphine) palladium(0); water; triethylamine In tetrahydrofuran at 55℃; for 20h; Sonogashira Cross-Coupling;95%
With copper(l) iodide; tetrakis(triphenylphosphine) palladium(0); water; triethylamine In N,N-dimethyl-formamide at 60℃; for 24h;
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Inert atmosphere;
1-iodo-4-(methoxymethyl)benzene
91912-54-8

1-iodo-4-(methoxymethyl)benzene

calcium carbide
75-20-7

calcium carbide

1,2-bis(4-(methoxymethyl)phenyl)ethyne

1,2-bis(4-(methoxymethyl)phenyl)ethyne

Conditions
ConditionsYield
With copper(l) iodide; palladium diacetate; triethylamine; triphenylphosphine In acetonitrile at 20℃; Sonogashira coupling; Inert atmosphere;99%
calcium carbide
75-20-7

calcium carbide

N-2-methylphenyl-3-phenylcarbohydrazonoyl chloride
25939-09-7

N-2-methylphenyl-3-phenylcarbohydrazonoyl chloride

3-phenyl-1-(2-methylphenyl)-1H-pyrazole

3-phenyl-1-(2-methylphenyl)-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
N-(3-tolyl)benzohydrazonoyl chloride

N-(3-tolyl)benzohydrazonoyl chloride

calcium carbide
75-20-7

calcium carbide

3-phenyl-1-(3-tolyl)-1H-pyrazole

3-phenyl-1-(3-tolyl)-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
4-(tert-butyl)-N-phenylbenzohydrazonoyl chloride

4-(tert-butyl)-N-phenylbenzohydrazonoyl chloride

calcium carbide
75-20-7

calcium carbide

3-(4-(tert-butyl)phenyl)-1-phenyl-1H-pyrazole
1609032-02-1

3-(4-(tert-butyl)phenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Solvent; Sealed tube;99%
4-(tert-butyl)-N-phenylbenzohydrazonoyl chloride

4-(tert-butyl)-N-phenylbenzohydrazonoyl chloride

calcium carbide
75-20-7

calcium carbide

4,5-dideutero-3-(4-(tert-butyl)phenyl)-1-phenyl-1H-pyrazole

4,5-dideutero-3-(4-(tert-butyl)phenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform-d1; water-d2 at 20℃; for 48h; Sealed tube;99%
3,4-dimethyl-N-phenylbenzohydrazonoyl chloride

3,4-dimethyl-N-phenylbenzohydrazonoyl chloride

calcium carbide
75-20-7

calcium carbide

3-(3,4-dimethylphenyl)-1-phenyl-1H-pyrazole

3-(3,4-dimethylphenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

3,5-dimethyl-N-phenylbenzohydrazonoyl chloride
25939-20-2

3,5-dimethyl-N-phenylbenzohydrazonoyl chloride

3-(3,5-dimethylphenyl)-1-phenyl-1H-pyrazole

3-(3,5-dimethylphenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

4-methoxy-N'-phenylbenzohydrazonoyl chloride
40277-63-2

4-methoxy-N'-phenylbenzohydrazonoyl chloride

3-(4-methoxy-phenyl)-1-phenyl-1H-pyrazole
33064-21-0

3-(4-methoxy-phenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

4-methoxy-N'-phenylbenzohydrazonoyl chloride
40277-63-2

4-methoxy-N'-phenylbenzohydrazonoyl chloride

4,5-dideutero-3-(4-methoxyphenyl)-1-phenyl-1H-pyrazole

4,5-dideutero-3-(4-methoxyphenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform-d1; water-d2 at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

p-toluoyl chloride phenylhydrazone
25939-01-9

p-toluoyl chloride phenylhydrazone

3-(4-methylphenyl)-1-phenyl-1H-pyrazole
33064-20-9

3-(4-methylphenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

3-methyl-N'-phenylbenzohydrazonoyl chloride
25939-10-0

3-methyl-N'-phenylbenzohydrazonoyl chloride

1-phenyl-3-(3-tolyl)-1H-pyrazole
895138-61-1

1-phenyl-3-(3-tolyl)-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

3-methyl-N'-phenylbenzohydrazonoyl chloride
25939-10-0

3-methyl-N'-phenylbenzohydrazonoyl chloride

4,5-dideutero-1-phenyl-3-(3-tolyl)-1H-pyrazole

4,5-dideutero-1-phenyl-3-(3-tolyl)-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform-d1; water-d2 at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

N-phenylbenzohydrazonoyl chloride
15424-14-3

N-phenylbenzohydrazonoyl chloride

1,3-diphenyl-1H-pyrazole
4492-01-7

1,3-diphenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

N-phenylbenzohydrazonoyl chloride
15424-14-3

N-phenylbenzohydrazonoyl chloride

4,5-dideutero-1,3-diphenyl-1H-pyrazole

4,5-dideutero-1,3-diphenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform-d1; water-d2 at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

4-bromo-N-phenylbenzohydrazonoyl chloride
25939-12-2

4-bromo-N-phenylbenzohydrazonoyl chloride

3-(4-bromophenyl)-1-phenyl-1H-pyrazole
33064-18-5

3-(4-bromophenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

4-bromo-N-phenylbenzohydrazonoyl chloride
25939-12-2

4-bromo-N-phenylbenzohydrazonoyl chloride

3-(4-bromophenyl)-4,5-dideutero-1-phenyl-1H-pyrazole

3-(4-bromophenyl)-4,5-dideutero-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform-d1; water-d2 at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

N-phenyl-p-chlorobenzohydrazonoyl chloride
36590-52-0

N-phenyl-p-chlorobenzohydrazonoyl chloride

3-(4-chlorophenyl)-1-phenyl-1H-pyrazole
33064-19-6

3-(4-chlorophenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

chloro(phenyl)methanone p-bromophenylhydrazone
41626-19-1

chloro(phenyl)methanone p-bromophenylhydrazone

1-(4-bromophenyl)-3-phenyl-1H-pyrazole

1-(4-bromophenyl)-3-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

chloro(phenyl)methanone p-bromophenylhydrazone
41626-19-1

chloro(phenyl)methanone p-bromophenylhydrazone

1-(4-bromophenyl)-4,5-dideutero-3-phenyl-1H-pyrazole

1-(4-bromophenyl)-4,5-dideutero-3-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform-d1; water-d2 at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

3,4-dichloro-N-phenylbenzohydrazonoyl chloride
25938-99-2

3,4-dichloro-N-phenylbenzohydrazonoyl chloride

3-(3,4-dichlorophenyl)-1-phenyl-1H-pyrazole

3-(3,4-dichlorophenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
calcium carbide
75-20-7

calcium carbide

N-(α-chlorobenzylidene)-N'-p-chlorophenylhydrazine
17359-82-9

N-(α-chlorobenzylidene)-N'-p-chlorophenylhydrazine

1-(4-chlorophenyl)-3-phenyl-1H-pyrazole
63637-57-0

1-(4-chlorophenyl)-3-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
N-phenyl-2-fluorobenzenecarbohydrazonoyl chloride
69660-02-2

N-phenyl-2-fluorobenzenecarbohydrazonoyl chloride

calcium carbide
75-20-7

calcium carbide

3-(2-fluorophenyl)-1-phenyl-1H-pyrazole

3-(2-fluorophenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%
N-phenyl-2-fluorobenzenecarbohydrazonoyl chloride
69660-02-2

N-phenyl-2-fluorobenzenecarbohydrazonoyl chloride

calcium carbide
75-20-7

calcium carbide

4,5-dideutero-3-(2-fluorophenyl)-1-phenyl-1H-pyrazole

4,5-dideutero-3-(2-fluorophenyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform-d1; water-d2 at 20℃; for 48h; Sealed tube;99%
2-(4-isobutylphenyl)-N-phenylpropanehydrazonoyl chloride

2-(4-isobutylphenyl)-N-phenylpropanehydrazonoyl chloride

calcium carbide
75-20-7

calcium carbide

3-(1-(4-isobutylphenyl)ethyl)-1-phenyl-1H-pyrazole

3-(1-(4-isobutylphenyl)ethyl)-1-phenyl-1H-pyrazole

Conditions
ConditionsYield
With triethylamine In chloroform; water at 20℃; for 48h; Sealed tube;99%

75-20-7Relevant articles and documents

Ca2LiC3H: A new complex carbide hydride phase grown in metal flux

Lang, David A.,Zaikina, Julia V.,Lovingood, Derek D.,Gedris, Thomas E.,Latturner, Susan E.

, p. 17523 - 17530 (2010)

The reaction of carbon and CaH2 in a calcium/lithium flux mixture produces crystals of the new compound Ca2LiC3H. This phase forms with a new structure type in tetragonal space group P4/mbm (a = 6.8236(1) A, c = 3.7518(1) A, Z = 2, R1 = 0.0151). This is a stuffed variant of the Cs2(NH2)N3 structure, containing hydride anions in octahedral sites; the structure determination by single-crystal X-ray diffraction surprisingly allowed the hydrogen to be detected. The Ca2LiC3H structure also features the rarely seen C34- carbide anion; the protolysis reaction of this compound with ammonium chloride produces C 3H4. The electronic properties of Ca2LiC 3H were studied by quantum-chemical calculations including band structure and electron localization function (ELF) analysis; the phase is a charge-balanced semiconductor with a calculated band gap of 0.48 eV. This is in agreement with 7Li, 13C, and 1H MAS NMR data, which show resonances in the ionic region instead of the Knight shifted region. ELF analysis of the theoretical nonhydrided Ca2LiC3 structure confirms the ability of these calculations to properly locate hydrides and supports the structural model based on X-ray diffraction data.

Use of nitric oxide-releasing agents to treat impotency

-

, (2008/06/13)

A method of treatment for impotency is provided. The method involves the administration of nitric oxide by a nitric oxide-releasing agent capable of providing a penile erection-inducing amount of nitric oxide to the corpus cavernosum of the penis of an impotent male animal. Also provided is a nitric oxide delivery means for use in the method.

BEHAVIOUR OF METAL CARBONATES IN SPECTROSCOPIC ARC, I. PRELIMINARIES. ROLE OF INSTABILITY OF CARBONATES

Szabo, Z. L.,Bertalan, E.,Tatar, E.

, p. 193 - 208 (2007/10/02)

Seven kinds of metal carbonates of different stability were studied in a.c. polarized arc, in Ar atmosphere, on mixtures with carbon powder of a molar fraction of 0.3 metal carbonate.The higher the thermal stability of the carbonate, the lower quantities of carbon oxides, measured by gas analytical methods were produced in the arc.The less stable carbonates suffer simple thermal decomposition, while in the case of Li2CO3 and BaCO3, carbon powder have a direct reducing effect.Under the conditions of the arc a substantial volume of CO was formed too, mainly according to the equation CO2 + C = 2 CO.Of the less stable carbonates, unstable metal oxides were formed, giving rise to further oxidation reactions.In the case of several carbonates, carbide formation could also be proved by gas analytical methods.Processes proceeding in the arc, their place, the depth of the reaction zone, etc., could be calculated and followed on the basis of data measured.Model substances for further investigations were chosen on the bases of these experiences.

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