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LC5249 Sodium sulfite
extra pure

 

Order number Packaging Quantity Price €
AC32249 Plastic bottle 1 kg inquire
AC32249 Double PE Sack 25 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) 95.0 – 100.5 %
Assay (SO2) ≥ 48 %
Identity passes test
Appearance of solution passes test
Thiosulfate (S2O3) ≤ 0.04 %
Heavy metals (as Pb) ≤ 0.0005 %
As (Arsenic) ≤ 0.0002 %
Hg (Mercury) ≤ 0.0001 %
Fe (Iron) ≤ 0.001 %
Pb (Lead) ≤ 0.0005 %
Se (Selenium) ≤ 0.0004 %
Zn (Zinc) ≤ 0.00250 %
Residual solvents (Ph. Eur./ICH) excluded by the manufacturing process
Residues of metal catalysts or metal reagents acc.to EMEA/CH MP/SWP/4446/2000
are not likely to be present.