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LC4938 Potassium disulfite
for analysis EMSURE

 

Order number Packaging Quantity Price €
AC31938 Plastic bottle 500 g 15.03
AC31938 Plastic bottle 1 kg 25.65
AC31938 Plastic bottle 2.5 kg 54.45

 

Product information
Synonyms Potassium metabisulfite, Potassium pyrosulfite
Hill Formula K2O5S2
Chemical formula K2S2O5
HS Code 2832 20 00
EC number 240-795-3
Molar mass 222.33 g/mol
CAS number 16731-55-8

 

Chemical and physical data
Solubility 450 g/l (20 °C)
Melting point 150 °C (decomposition)
Molar mass 222.33 g/mol
Density 2.34 g/cm3
Bulk density 1000 – 1300 kg/m3
pH value 3.0 – 4.5 (50 g/l, H2O, 20 °C)

 

Safety information
R Phrase R 31-37-41
Contact with acids liberates toxic gas.Irritating to respiratory system.Risk of serious damage to eyes.
S Phrase S 26-39
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear eye/face protection.
Categories of danger irritant
Hazard Symbol Irritant
Storage class 10 – 13 Other liquids and solids
WGK WGK 1 slightly water endangering
Disposal 6
Sulfides and sulfites as well as other reducing substances, inorganic cyanides and isonitriles: Stir into sodium hypochlorite solution (Cat. No. 105614) and, if necessary, leave to react for several days. Caution: some substances may show a violent reaction! Draw off any toxic or flammable gases that may be formed. Excess oxidant should be neutralized with sodium thiosulfate (Cat. No. 106513). Container D or E.

 

Toxicological data
LD 50 oral LD50 rat 2300 mg/kg

 

Specifications
Assay (iodometric) ≥ 96 %
In water insoluble matter ≤ 0.005 %
Chloride (Cl) ≤ 0.005 %
As (Arsenic) ≤ 0.0001 %
Cu (Copper) ≤ 0.001 %
Fe (Iron) ≤ 0.0005 %
Pb (Lead) ≤ 0.001 %
Zn (Zinc) ≤ 0.001 %