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POTASSIUM METABISULPHITE AR

Potassium pyrosulfite; Dipotassium disulfite

COAs

Packings

500 g (00500)

1PW1200500
Print friendly version
Article No. 05395 Grade AR
Purity 96% CAS No. 16731-55-8
Molecular Formula K2S2O5 Molecular Weight 222.31
H.S. Code 2832.2010 Shelf Life 60 Months

Physical Properties

Physical state at 20 °C Solid Colour White crystalline
Odour Odorless pH value 3-4.5 at 22.2 g/l at 25 °C
Melting point/ Freezing point [°C] 150°C Decomposition point [°C] 150°C
Vapour density 2.3 Density [g/cm3] 2.34
Solubility in water [% weight] 22.2 g/l at 20 °C

Specifications

Appearance White crystalline powder Assay Min 96%
Insoluble matter in water Max 0.005% Chloride (Cl) Max 0.005%
Copper (Cu) Max 0.005% Lead (Pb) Max 0.005%
Iron (Fe) Max 0.005% Zinc (Zn) Max 0.005%
Cadmium (Cd) Max 0.005%

Safety Information and Hazard Symbols

Exclamation Mark
Symbol: GHS07
 Signal Word: Warning
 Hazardous Statement: H315-H319-H335
 Precaution Statement: P261-P305 + P351 + P338
Revision Date: 13-Dec-2013

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