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LC5250 Sodium sulfite
anhydrous for analysis

 

Order number Packaging Quantity Price €
AC32250 Plastic bottle 500 g 14.22
AC32250 Plastic bottle 1 kg 23.18
AC32250 Plastic bottle 5 kg 93.60
AC32250 Fiber carton 50 kg inquire

 

Product information
Hill Formula Na2O3S
Chemical formula Na2SO3
HS Code 2832 10 00
EC number 231-821-4
Molar mass 126.04 g/mol
CAS number 7757-83-7

 

Chemical and physical data
Solubility 220 g/l (20 °C)
Melting point >500 °C (decomposition)
Molar mass 126.04 g/mol
Density 2.63 g/cm3 (20 °C)
Bulk density 1480 kg/m3
pH value 8.8 – 10 (50 g/l, H2O, 20 °C)

 

Safety information
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 2610 mg/kg

 

Specifications
Assay (iodometric) 97.0 – 100.5 %
Identity passes test
Appearance of solution passes test
Insoluble matter ≤ 0.005 %
Free acid passes test
Titrable free base ≤ 0.03 meq/g
Chloride (Cl) ≤ 0.02 %
Thiosulfate (S2O3) ≤ 0.03 %
Heavy metals (as Pb) ≤ 0.0005 %
As (Arsenic) ≤ 0.0001 %
Cu (Copper) ≤ 0.0005 %
Fe (Iron) ≤ 0.001 %
Pb (Lead) ≤ 0.0005 %
Se (Selenium) ≤ 0.0004 %
Zn (Zinc) ≤ 0.001 %