|
Name
|
|
EINECS
|
232-189-2
|
|
CAS No.
|
7789-78-8
|
Density
|
1.9
|
|
PSA
|
0.00000
|
LogP
|
0.22500
|
|
Solubility
|
Soluble in water and alcohol. Insoluble in benzene.
|
Melting Point
|
190 °C(lit.)
|
|
Formula
|
CaH2
|
Boiling Point
|
1484oC
|
|
Molecular Weight
|
42.0939
|
Flash Point
|
N/A
|
|
Transport Information
|
UN 1404 4.3/PG 1
|
Appearance
|
greyish-white solid
|
|
Safety
|
24/25-43-7/8-43A
|
Risk Codes
|
15
|
|
Molecular Structure
|
|
Hazard Symbols
|
 F
|
|
Synonyms
|
Calcium hydride (CaH2);Calciumdihydride;
|
Article Data |
108
|
Calcium hydride Synthetic route
Conditions
| Conditions | Yield |
|---|
| In melt High Pressure; Ca melted in vac. at 350°C for 5 h, filled with H2 (5 atm) at 400°C for 5 min, at 10 atm. at 480°; elem. anal.; | 99.6% |
| In neat (no solvent) hydrogenation in a closed iron tube under pressure at temperatures between 650°C and 690°C;; | 90% |
| In neat (no solvent) hydrogenation in a closed iron tube under pressure at temperatures between 650°C and 690°C;; | 90% |
calcium chloride
Conditions| Conditions | Yield |
|---|
| In neat (no solvent) heating the mixture in H2-atmosphere to 420-600°C;; product-mixture;; | |
| In neat (no solvent) heating the mixture in H2-atmosphere to 420-600°C;; product-mixture;; | |
B
calcium nitride
Conditions| Conditions | Yield |
|---|
| With ammonia at red heat; | |
| With NH3 at red heat; | |
hydrogen
Conditions| Conditions | Yield |
|---|
| In neat (no solvent) on evacn. of system(metal, loaded (Ar) into reactor-autoclave of the hydrogenation apparatus)at 300-350°C (0.5-1h),cooling to room temp. and feeding hydrogen into reactor (from LaNi5 "accumulator") to give pressure of 2.8MPa, 150°C, 1h;; on gas-volumetric and chemical anal.; XRD (orthorhombic, lattice parameters); react. without an induction period and forming a clinker;; | |
| In neat (no solvent) on evacn. of system(metal, loaded (Ar) into reactor-autoclave of the hydrogenation apparatus)at 300-350°C (0.5-1h),cooling to room temp. and feeding hydrogen into reactor (from LaNi5 "accumulator") to give pressure of 3.5MPa, 200°C, 1h;; on gas-volumetric and chemical anal.; XRD (orthorhombic, lattice parameters); react. is running without an induction period and forming of a clinker;; | |
calcium benzylate
B
calcium nitride
Conditions| Conditions | Yield |
|---|
| byproducts: H2, N2; vigorous reaction at 400°C; | |
| byproducts: H2, N2; vigorous reaction at 400°C; | |
hydrogen
calcium chloride
Conditions| Conditions | Yield |
|---|
| In neat (no solvent) byproducts: calcium oxide; bombarding solid CaCl2 deposited on substrate with atomar H for 60 mins in plasmochemical app. described by I. Sh. Normatov, N. Shermatov, and U. Mirsaidov, Fiz. Khim. Obrab. Mater., No. 3, 141-142 (1990);; formation of metallic layer, containing oxide phase of calcium; X-ray diffraction;; | A 0%
B n/a |
hydrogen
calcium chloride
Conditions| Conditions | Yield |
|---|
| In neat (no solvent) byproducts: HCl; bombarding periodically stirred CaCl2 (on substrate) with H for 120 mins in plasmochemical app. described by I. Sh. Normatov, N. Shermatov, and U. Mirsaidov, Fiz. Khim. Obrab. Mater., No. 3, 141-142 (1990); grinding; bombarding with H for 120 mins;; X-ray diffraction, DTA, IR spectroscopy;; | |
calcium chloride
Conditions| Conditions | Yield |
|---|
| In neat (no solvent) reaction of CaCl2 with H2 formed by dissociation of CH4;; | |
calcium nitride
Conditions| Conditions | Yield |
|---|
| reversible react.; | |
| at dark red heat and at temperatures above it; | |
Calcium hydride Chemical Properties
IUPAC Name: Calcium hydride
Molecular Formula: CaH2
Molecular Weight: 42.093880 g/mol
Melting Point: 190 °C(lit.)
Density: 1.70 g/cm3
Sensitive: Moisture
EINECS: 232-189-2
Appearance: Greyish-white solid
Structure of Calcium hydride (CAS NO.7789-78-8):
Categories of Calcium hydride (CAS NO.7789-78-8): Inorganics;Adsorbents, Filter Aids and Drying Agents;Other Drying AgentsEssential Chemicals;Materials for Hydrogen Storage;Synthetic Reagents;Metal Hydrides
Calcium hydride Uses
Calcium hydride (CAS NO.7789-78-8) is widely used as a desiccant for basic solvents such as amines and pyridine. It is also used to pre-dry solvents prior to the use of a more reactive desiccant.
Calcium hydride Safety Profile
Hazard Codes:F 
Risk Statements:15
15:Contact with water liberates extremely flammable gases
Safety Statements:24/25-43-7/8-43A
24/25:Avoid contact with skin and eyes
43:In case of fire, use ... (indicate in the space the precise type of fire-fighting equipment. If water increases the risk add - Never use water)
7/8:Keep container tightly closed and dry
43:In case of fire, use ... (indicate in the space the precise type of fire-fighting equipment. If water increases the risk add - Never use water)
Explosive reaction on heating with tetrahydrofuran. Mixtures with potassium chlorate and other metal oxohalogenates (e.g., chlorates; bromates; and perchlorates) are heat- and friction-sensitive explosives. Vigorous or incandescent reaction on heating with halogens (chlorine; bromine; or iodine); manganese dioxide; and silver halides (e.g., silver fluoride; silver iodide). See also CALCIUM COMPOUNDS and HYDRIDES.
Calcium hydride Specification
Calcium hydride (CAS NO.7789-78-8) is hazardous, so the first aid measures and others should be known. Such as: When on the skin: first, should flush skin with plenty of water immediately for at least 15 minutes while removing contaminated clothing. Secondly, get medical aid. Or in the eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Then get medical aid soon. While, it's inhaled: Remove from exposure and move to fresh air immediately. Give artificial respiration while not breathing. When breathing is difficult, give oxygen. And as soon as to get medical aid. Then you have the ingesting of the product: If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.
In addition, you should keep it away from sources of ignition. It should be stored in a tightly closed container.
