POTASSIUM CARBONATE


PRODUCT IDENTIFICATION

CAS NO.

584-08-7

POTASSIUM CARBONATE

EINECS NO.

209-529-3

FORMULA

K2CO3

MOL WT. 138.21

H.S. CODE

2836.40
TOXICITY Oral rat LD50: 1870 mg/kg
SYNONYMS Potash; Salt of Tartar; Carbonic acid, Dipotassium salt;
Potassium carbonate (2:1); Kaliumcarbonat; Pearl ash;
SMILES

by the reaction of carbon dioxide with potassium chloride + magnesium oxide (Engel-Precht process) or electrolytic caustic lye.

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

white powder or granular

MELTING POINT

891 C

BOILING POINT Decomposes
SPECIFIC GRAVITY 2.29
SOLUBILITY IN WATER

soluble (insoluble in alcohol)

pH 11.6 (Aqueous solution)
VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS

Health: 2 Flammability: 0 Reactivity: 1

REFRACTIVE INDEX

 

FLASH POINT Not considered to be a fire hazard
STABILITY Stable under ordinary conditions

APPLICATIONS

Potassium Carbonate is used in glasses, ceramics, explosives, fertilizers,and glazes industry, in the the manufacture of soft soaps, inorganic salts, and in dyeing and wool finishing.

SALES SPECIFICATION

APPEARANCE

white powder

ASSAY

98.5% min

CHLORIDES

0.1% max

SULPHATES

0.1% max

Fe

0.003% max

WATER INSOLUBLES

0.05% max

HEAVY METALS

10ppm max

MEAN PARTICLE SIZE

0.25 - 1mm

TRANSPORTATION
PACKING 50kgs in bag
HAZARD CLASS listed on the TSCA inventory
UN NO.  
REMARKS

Commercially anhydrous and 1.5 hydrated forms are available. K2CO3 (melting point at 891 C) decomposes before boiled. 2K2CO3.3H2O dehydrates to K2CO3.H2O at 100 C and to K2CO3 at 130 C.