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| CAS No.: | 584-08-7 |
|---|---|
| Name: | Potassium carbonate |
| Article Data: | 335 |
| Cas Database | |
| Molecular Structure: | |
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| Formula: | K2CO3 |
| Molecular Weight: | 138.206 |
| Synonyms: | Carbonic acid,compounds,dipotassium salt;dipotassium salt;Potassium Carbonate ACS Granular;EPA Pesticide Chemical Code 073504;Kalium carbonicum;Dipotassium carbonate;Potassium carbonate (JP14/USP);Potassium carbonate (2:1);Salt of tartar;Carbonate of potash;Pearl ash;Carbonic acid, dipotassium salt;Kaliumcarbonat [German];Potassium carbonate, anhydrous;Potassium carbonate (K2CO3); |
| EINECS: | 209-529-3 |
| Density: | 2.43 g/mL at 25 °C |
| Melting Point: | 891 °C(lit.) |
| Boiling Point: | 333.6oC at 760 mmHg |
| Flash Point: | 111oC |
| Solubility: | 1120 g/L (20 °C) in water |
| Appearance: | white powder or granules |
| Hazard Symbols: |
 Xn
|
| Risk Codes: | 22-36/37/38-20/21/22 |
| Safety: | 26-36-37/39 |
| Transport Information: | UN 3262 |
| PSA: | 63.19000 |
| LogP: | -2.44700 |
| Conditions | Yield |
|---|---|
| potassium hydroxide In solid byproducts: H2; 330 °C; with KOH (1:0.05) in N2 atmosphere, the heating rate 6 deg/min; | A 93% B n/a |
| in aluminium block at 460-500°C; | A 79% B n/a |
| With air In melt 460-500°C, in presence of air; | A 79% B 20% |
| Conditions | Yield |
|---|---|
| In tetrahydrofuran reductive disproportionation;; IR;; | A 48% B 78% |
| Conditions | Yield |
|---|---|
| In tetrahydrofuran reductive disproportionation, mechanism discussed;; IR;; | A 73% B 42% |
| Conditions | Yield |
|---|---|
| In tetrahydrofuran reductive disproportionation;; IR;; | A 68% B 46% |
| Conditions | Yield |
|---|---|
| With KC8 In hexane at 20℃; for 48h; | A 68% B n/a |
| Conditions | Yield |
|---|---|
| In ethanol decompn. with alc. KOH at 35°C in 48h;; | A 24% B n/a |
| In ethanol |
D
potassium carbonate
| Conditions | Yield |
|---|---|
| With air In neat (no solvent) sample heating in air up to 1000°C; TG, DTG, DTA, XRD; | A n/a B n/a C 1% D n/a E n/a |
| Conditions | Yield |
|---|---|
| With 2,6-dimethylpyridine In acetonitrile at 55℃; for 4h; Product distribution / selectivity; |
| Conditions | Yield |
|---|---|
| With CO2 In water sepn. and decompn. of the formed K-Zn-double carbonate with hot water; | |
| With carbon dioxide In water sepn. and decompn. of the formed K-Zn-double carbonate with hot water; |
| Conditions | Yield |
|---|---|
| With water byproducts: AgCl; | |
| With H2O byproducts: AgCl; |
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1、Potassium carbonate was first identified in 1742 by Antonio Campanella and is the primary component of potash and the more refined pearlash or salts of tartar.
2、The first patent issued by the U.S. Patent Office was awarded to Samuel Hopkins in 1790 for an improved method of making potash and pearlash.
3、In late 18th century North America, before the development of baking powder, pearl ash was used as a leavening agent in "quick breads".
Reported in EPA TSCA Inventory.
Potassium carbonate , its CAS NO. is 584-08-7, the synonyms are Carbonic acid, dipotassium salt ; Dipotassium carbonate . Potassium carbonate (K2CO3) is a white salt, soluble in water (insoluble in ethano), which forms a strongly alkaline solution. It is deliquescent, often appearing a damp or wet solid. Potassium carbonate is used in the production of soap and glass.
Properties about Potassium carbonate are: (1)mp: 891 °C(lit.); (2)density: 2.43 g/mL at 25 °C; (3)storage temp.: Store at RT.; (4)solubility H2O: 1 M at 20 °C, clear, colorless; (5)form: powder; (6)Water Solubility: 1120 g/L (20 oC); (7)Sensitive: Hygroscopic; (8)Merck: 14,7619; (9)BRN: 4267587;
Preparation of Potassium carbonate: Today potassium carbonate is prepared commercially by the electrolysis of potassium chloride. The resulting potassium hydroxide is then carbonated using carbon dioxide to form potassium carbonate, which is often used to produce other potassium compounds.
2KOH + CO2 → K2CO3 + H2O
Uses of Potassium carbonate: Potassium carbonate is being used as the electrolyte in many cold fusion experiments. It is sometimes used as a buffering agent in the production of mead or wine. It is also used as a fire suppressant in extinguishing deep fat fryers and various other B class related fires. It is used in reactions to maintain anhydrous conditions without reacting with the reactants and product formed. It may also be used to pre-dry some ketones, alcohols, and amines prior to distillation. It is mixed with distilled water to make a safer electrolyte for oxyhydrogen production than potassium hydroxide, the more commonly used electrolyte. In cuisine, it is used as an ingredient in the production of grass jelly, a food consumed in Chinese and Southeast Asian cuisines.
When you are using this chemical, please be cautious about it as the following:
1. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice;
2. Wear suitable protective clothing;
3. Wear suitable gloves and eye/face protection;
You can still convert the following datas into molecular structure:
(1)InChI=1S/CH2O3.2K/c2-1(3)4;;/h(H2,2,3,4);;/q;2*+1/p-2;
(2)InChIKey=BWHMMNNQKKPAPP-UHFFFAOYSA-L;
(3)SmilesC(=O)([O-])[O-].[K+].[K+];
The toxicity data is as follows:
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| bird - wild | LD50 | oral | 100mg/kg (100mg/kg) | Archives of Environmental Contamination and Toxicology. Vol. 12, Pg. 355, 1983. | |
| mouse | LD50 | oral | 2570mg/kg (2570mg/kg) | Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 33(5), Pg. 30, 1989. | |
| rat | LC | inhalation | > 500mg/m3 (500mg/m3) | Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 33(5), Pg. 30, 1989. | |
| rat | LD50 | oral | 1870mg/kg (1870mg/kg) | American Industrial Hygiene Association Journal. Vol. 30, Pg. 470, 1969. |
