Potassium carbonate
Synonym(s):Dipotassium carbonate;potash;Potassium carbonate
- CAS NO.:584-08-7
- Empirical Formula: K2CO3
- Molecular Weight: 138.21
- MDL number: MFCD00011382
- EINECS: 209-529-3
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-05-08 14:48:35
What is Potassium carbonate?
Description
Potassium carbonate (K2CO3) is a commonly used base in organic chemistry. The pKa of its conjugate acid is 10.25. It is commonly used to deprotonate moderately acidic protons such as phenols (pKa ~10) and 1,3-dicarbonyl compounds (pKa ~9-13). Potassium carbonate has high solubility in water (1.12 g/mL, at 20 C), and has low solubility in ethanol, acetone, and many other common organic solvents.
The Uses of Potassium carbonate
Potassium carbonate is used for numerous applications. Its primary use is in the production of specialty glasses and ceramics. It is used to make optical glass, glass used for video screens in televisions and computers, and laboratory glassware. Its is used in certain glasses rather then cheaper sodium carbonate owing to its better compatibility with lead, barium, and strontium oxides incorporated in these glasses. These oxides lower the melting point of glass and produce a softer glass. Potassium carbonate has a higher refractive index than sodium carbonate producing a more brilliant glass. Potassium carbonate is a common flux combined with titanium dioxide to produce frits used in ceramics. A frit is a calcined mixture of fine silica, a pigment, and a flux that is ground a specific particle size and used to produce glazes, enamels, and additives in glass making.
Potassium carbonate is used in agriculture and food production. Potassium carbonate is used as a spray or drip fertilizer and also as a constituent of compound fertilizers. Its high water solubility and alkaline property make it useful for supplying potassium to acidic soils, especially in vineyards and orchards. Dutch-processed cocoa uses potassium carbonate as an alkalizing agent to neutralize the natural acidity of cocoa. It is used to produce food additives like potassium sorbate and monopotassium phosphate.
Potassium carbonate is used in the chemical industry as a source of inorganic potassium salts (potassium silicates, potassium bicarbonate), which are used in fertilizers, soaps, adhesives, dehydrating agents, dyes, and pharmaceuticals. Potassium carbonate used to make potassium lye produces soft soaps, which are liquids or semisolids rather than solids. Other uses of potassium carbonate includes use as a fire suppressant in extinguishers, as a CO2 absorbent for chemical processes and pollution control, an antioxidant in rubber additives, and in pharmaceutical formulations.
Background
Potassium carbonate (K2CO3) is a white salt, soluble in water (insoluble in ethanol) which forms a strongly alkaline solution. It can be made as the product of potassium hydroxide's absorbent reaction with carbon dioxide. It presents a large capacity to absorb moisture.
What are the applications of Application
Potassium carbonate is a potassium salt for deproteinization and as a drying agent
Metabolism
Not Available
Properties of Potassium carbonate
Melting point: | 891 °C (lit.) |
Boiling point: | decomposes [STR93] |
Density | 2.43 g/mL at 25 °C |
storage temp. | Store at +5°C to +30°C. |
solubility | H2O: 1 M at 20 °C, clear, colorless |
appearance | White solid |
form | powder |
color | Yellow |
Water Solubility | 1120 g/L (20 ºC) |
Sensitive | Hygroscopic |
Safety information for Potassium carbonate
Signal word | Warning |
Pictogram(s) |
Exclamation Mark Irritant GHS07 |
GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Potassium carbonate
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ANJI BIOSCIENCES
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PAARICHEM RESOURCES LLP
JSK Chemicals
Kronox Lab Sciences Pvt Ltd
Sree Rayalaseema HI Strength Hypo Ltd
Annexe Chem Pvt Ltd
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