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497-19-8

Basic Information
CAS No.: 497-19-8
Name: Sodium carbonate
Article Data: 865
Cas Database
Molecular Structure:
Molecular Structure of 497-19-8 (Sodium carbonate)
Formula: Na2CO3
Molecular Weight: 105.989
Synonyms: Soda Ash;Carbonic acid, disodium salt;Bisodium carbonate;Calcined soda;Carbonic acid sodium salt;Carbonic acid sodium salt (1:2);Carbonic acid, disodium salt;Crystol carbonate;Disodium carbonate (Na2CO3);Soda, calcined;Sodium carbonate (2:1);Sodium carbonate, anhydrous;
EINECS: 207-838-8
Density: 2.54 g/cm3
Melting Point: 851 °C
Boiling Point: 333.6 °C at 760 mmHg
Flash Point: 169.8 °C
Solubility: 22 g/100 mL (20 °C) in water
Appearance: white odourless powder
Hazard Symbols: HarmfulXn, IrritantXi
Risk Codes: 32-36-51/53-36/37/38-41-37/38
Safety: 36/37-26-22-36-39
Transport Information: UN 3082
PSA: 63.19000
LogP: -2.44700
Synthetic route

ammonium carbonate

7664-41-7

ammonia

7647-14-5

sodium chloride

497-19-8

sodium carbonate

Conditions
ConditionsYield
In water NH3 passed into a soln. of (NH4)2CO3-NaCl until satn.; product free of Cl and NH3;100%
In water NH3 passed into a soln. of (NH4)2CO3-NaCl until satn.; product free of Cl and NH3;100%

Na2[B(CN)3]

584-08-7

potassium carbonate

A

K[HB(CN)3]

B

497-19-8

sodium carbonate

C

1310-73-2

sodium hydroxide

Conditions
ConditionsYield
With tetrahydrofuranA 100%
B n/a
C n/a

Glauber's salt

201230-82-2

carbon monoxide

1333-74-0

hydrogen

A

7783-06-4

hydrogen sulfide

B

7732-18-5

water

C

497-19-8

sodium carbonate

Conditions
ConditionsYield
with molten Na2SO4*10H2O; heating at 927 to 983°C for 2 h; ratio of CO and H2 1:3;A 98%
B n/a
C n/a
201230-82-2

carbon monoxide

7757-82-6

sodium sulfate

497-19-8

sodium carbonate

Conditions
ConditionsYield
iron(III) oxide In neat (no solvent) passing a mixture of CO/H2O-vapor over powdered Na2SO4 at 660°C; partial pressure of H2O: 0.3 at, catalyst: Fe2O3 in form of a Fe(NO3)2-soln.;; 85-92% Na2CO3;;97%
With catalyst: Fe2O3 and Sb2O5 or Fe2O3 and Sb2O4 or; Fe2O3 and As2O5 In neat (no solvent) passing a mixture of CO/H2O-vapor (CO from passing air through hot charcoal) over Na2SO4; partial pressure of H2O: 0.4 at, gas, containing 14.6% CO, is applied in 1.5-fold excess; catalyst: mixture of Fe2O3 and Sb2O5, Sb2O4 or As2O5;; 88.5% Na2CO3;;93.8%
With catalyst: Fe2O3 and Sb2O5 or Fe2O3 and Sb2O4 or; Fe2O3 and As2O5 In neat (no solvent) passing a mixture of CO/H2O-vapor (CO from passing air through hot charcoal) over Na2SO4, partial pressure of H2O: 0.4 at, catalyst :mixture of Fe2O3 and Sb2O5, Sb2O4 or As2O5;; 91.3-95.6% Na2CO3;;94-97.6
127099-85-8, 780722-26-1

N-Cyanoguanidine

1310-73-2

sodium hydroxide

A

disodium cyanamide

disodium cyanamide

B

497-19-8

sodium carbonate

Conditions
ConditionsYield
after V. A. Shushunov and A. M. Pavlov, Dokl. Akad. Nauk SSSR, 89, 1033(1953);A 95%
B 5%

disodium tetracarbonylferrate

124-38-9

carbon dioxide

13463-40-6

iron pentacarbonyl

B

497-19-8

sodium carbonate

Conditions
ConditionsYield
In tetrahydrofuran reductive disproportionation, mechanism discussed;; IR; iron carbonyl not isolated;;A 82%
B 94%
141-53-7

sodium formate

A

62-76-0

sodium oxalate

B

497-19-8

sodium carbonate

Conditions
ConditionsYield
sodium hydroxide In solid byproducts: H2; with NaOH (1:0.05) in N2 atmosphere, the heating rate 6 deg/min;A 92%
B n/a
In solid thermal decomposition of sodium formate in H2 atmosphere (TG at 435 :degree.C, the heating rate 6 deg/min;A 35%
B n/a
In solid thermal decomposition of sodium formate in CO atmosphere (TG at438 °C), the heating rate 6 deg/min;A 34%
B n/a

disodium tetracarbonylosmate

124-38-9

carbon dioxide

7553-56-2

iodine

17632-05-2

cis-Os(CO)4(I)2

B

497-19-8

sodium carbonate

Conditions
ConditionsYield
In tetrahydrofuran addn. of CO2 to suspension of Na2(Os(CO)4) in THF, filtn. onto I2 at 4°C;; pptg. of carbonate; soln.: removal of solvent (IR), sublimation off excess I2, extn. into toluene and concg. under vacuum;;A 61%
B 92%
875-74-1

(R)-phenylglycine

79-22-1

methyl chloroformate

497-19-8

sodium carbonate

Conditions
ConditionsYield
With sodium hydroxide In water at 0℃; for 1h;91%
124-38-9

carbon dioxide

497-19-8

sodium carbonate

Conditions
ConditionsYield
With [(1,1,4,7,10,10-hexamethyltriethylenetetramine)(Fe(NO)2)2]; sodium In tetrahydrofuran at 20℃; under 760.051 Torr; for 72h; Glovebox; Inert atmosphere; Sealed tube;90%
With Na-silicate In water introduction of CO2 into the aq. soln.;;
With Na-aryl sulfonate In further solvent(s) byproducts: aryl sulfonic acid ester; dissolving Na-aryl sulfonate (from aryl sulfonic acid and NaCl) in an alcohol, introduction of CO2-gas;;
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Specification

Sodium carbonate is also known as soda ash with the chemical formula Na2CO3. It is a white powder or granules which is odorless. You should keep it in a tightly closed container, stored in a cool, dry, ventilated area. In addition, you must protect it against physical damage and isolate from incompatible substances. The substance is stable under ordinary conditions of use and storage. Meanwhile, with the CAS register number 497-19-8, it has the EINECS registry number 207-838-8.

Physical properties about Sodium carbonate are:  (1)ACD/LogP: -0.809; (2)ACD/LogD (pH 5.5): -1.98; (3)ACD/LogD (pH 7.4): -3.77; (4)ACD/BCF (pH 5.5): 1.00 ; (5)ACD/BCF (pH 7.4): 1.00; (6)ACD/KOC (pH 5.5): 1.00; (7)ACD/KOC (pH 7.4): 1.00; (8)#H bond acceptors: 3; (9)#H bond donors: 2; (10)Flash Point: 169.8 °C ; (11)Enthalpy of Vaporization: 63.37 kJ/mol; (12)Boiling Point: 333.6 °C at 760 mmHg; (13)Vapour Pressure: 2.58E-05 mmHg at 25°C

Preparation of Sodium carbonate : Sodium carbonate can be extracted from the ashes of many plants. It is synthetically produced in large quantities from table salt and limestone in a process known as the Solvay process. The process needs calcium carbonate which is heated to release carbon dioxide at the bottom of the tower and ammonia used to convert sodium chloride to sodium carbonate at the top of the tower. The sodium bicarbonate was then converted to Sodium carbonate by heating it, releasing water and carbon dioxide:

CaCO3 → CaO + CO2
NaCl + NH3 + CO2 + H2O → NaHCO3 + NH4Cl
2 NaHCO3 → Na2CO3 + H2O + CO2

Meanwhile, Sodium carbonate can also be prepared by ammonia, carbon dioxide and saturation salt, called as union system alkaline which is improved from Solvay process by Hou Debang. This reaction has three steps as the follwing:

NH3 + CO2 + H2O → NH4HCO3
NH4HCO3 + NaCl → NaHCO3 + NH4Cl
2 NaHCO3 → Na2CO3 + CO2 + H2O

Uses of Sodium carbonate: Sodium carbonate is domestically well known for its everyday use as a water softener. It also has the most important use to manufacture glass. Sodium carbonate is also used as a relatively strong base in various settings. For example, sodium carbonate is used as a pH regulator to maintain stable alkaline conditions necessary for the action of the majority of developing agents. In domestic use, Sodium carbonate is used as a water softener during laundry. It is often used as an electrolyte in chemistry. This is because electrolytes are usually salt-based, and sodium carbonate acts as a very good conductor in the process of electrolysis. It is also used as a primary standard for acid-base titrations because it is solid and air-stable, making it easy to weigh accurately. In dyeing with fiber-reactive dyes, sodium carbonate is used to ensure proper chemical bonding of the dye with the fibers, typically before dyeing, mixed with the dye, or after dyeing.

When using Sodium carbonate, you must be cautious about it. The substance is irritant to eyes, respiratory system and skin and toxic to aquatic organisms which may cause long-term adverse effects in the aquatic environment. Whenever you will contact or use it, you must wear suitable protective clothing, gloves and eye/face protection.

You can still convert the following datas into molecular structure:
(1)Canonical SMILES: C(=O)([O-])[O-].[Na+].[Na+]
(2)InChI: InChI=1S/CH2O3.2Na/c2-1(3)4;;/h(H2,2,3,4);;/q;2*+1/p-2
(3)InChIKey: CDBYLPFSWZWCQE-UHFFFAOYSA-L

Toxicity of Sodium carbonate:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
guinea pig LC50 inhalation 800mg/m3/2H (800mg/m3) LUNGS, THORAX, OR RESPIRATION: DYSPNEA

GASTROINTESTINAL: OTHER CHANGES
Environmental Research. Vol. 31, Pg. 138, 1983.
man LDLo oral 714mg/kg (714mg/kg) BEHAVIORAL: GENERAL ANESTHETIC

GASTROINTESTINAL: ULCERATION OR BLEEDING FROM SMALL INTESTINE

GASTROINTESTINAL: OTHER CHANGES
Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 32, Pg. 570, 1990.
mouse LC50 inhalation 1200mg/m3/2H (1200mg/m3) LUNGS, THORAX, OR RESPIRATION: DYSPNEA

GASTROINTESTINAL: OTHER CHANGES
Environmental Research. Vol. 31, Pg. 138, 1983.
mouse LD50 intraperitoneal 117mg/kg (117mg/kg)   Comptes Rendus Hebdomadaires des Seances, Academie des Sciences. Vol. 257, Pg. 791, 1963.
mouse LD50 oral 6600mg/kg (6600mg/kg)   Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 20(11), Pg. 55, 1976.
mouse LD50 subcutaneous 2210mg/kg (2210mg/kg)   Russian Pharmacology and Toxicology Vol. 33, Pg. 266, 1970.
rat LC50 inhalation 2300mg/m3/2H (2300mg/m3) LUNGS, THORAX, OR RESPIRATION: DYSPNEA

GASTROINTESTINAL: OTHER CHANGES
Environmental Research. Vol. 31, Pg. 138, 1983.
rat LD50 oral 4090mg/kg (4090mg/kg)   "Sbornik Vysledku Toxixologickeho Vysetreni Latek A Pripravku," Marhold, J.V., Institut Pro Vychovu Vedoucicn Pracovniku Chemickeho Prumyclu Praha, Czechoslovakia, 1972Vol. -, Pg. 8, 1972.