SODIUM SULPHITE ANHYDROUS
SODIUM SULPHITE ANHYDROUS Extra Pure
Confirming to BP
Short Name: SODIUM SULPHITE ANHYDROUS
Synonym: disodium sulphite, Sulfurous acid disodium salt
Basic Details
Article No.
LG4281
Grade
Extra Pure
Purity
95%
CAS No.
7757-83-7
HS Code
2832.1090
Shelf Life
60 Months
Packings Avialable
Physical Properties
Physical state at 20 °C
Solid
Colour
White crystalline
Odour
Odorless
pH value
9.0 - 10.5 at 126 g/l at 25 °C
Melting point/ Freezing point [°C]
500°C
Density [g/cm3]
2.63
Solubility in water [% weight]
126 g/l at 20 °C - completely soluble
Chemical Specifications
Appearance
White crystalline powder
Assay (iodometric)
95 - 100.5%
SO2
Min 48%
Identity
Passes test
Appearance of solution
Passes test
Thiosulphate (S2O3)
Max 0.04%
Arsenic (As)
Max 0.0002%
Heavy metal (as Pb)
Max 0.001%
Iron (Fe)
Max 0.001%
Copper (Cu)
Max 0.0005%
Selenium (Se)
Max 0.001%
Zinc (Zn)
Max 0.0025%
Safety Information & Hazard Symbols