SODIUM METABISULPHITE
SODIUM METABISULPHITE AR/ACS
Short Name: SODIUM METABISULPHITE
Synonym: Sodium pyrosulphite; Sodium disulphite
Basic Details
Article No.
LG4196
Grade
AR/ACS
Purity
97%
CAS No.
7681-57-4
HS Code
2832.1090
Shelf Life
60 Months
Packings Avialable
Physical Properties
Physical state at 20 °C
Solid
Colour
White crystalline
Odour
Sulphorous
pH value
4.5 at 50 g/l at 20 °C
Melting point/ Freezing point [°C]
300 °C
Density [g/cm3]
1.48
Solubility in water [% weight]
650 g/l at 20 °C
Partition coefficient Log Pow octanol /water at 20°C
-3.7
Chemical Specifications
Appearance
White crystalline powder
Assay
Min. 97.0%
Insoluble matter in water
Max. 0.005%
Chloride (Cl)
Max. 0.005%
Arsenic (As)
Max. 0.0001%
Phosphate (PO4)
Max. 0.002%
Thiosulphate (S2O3)
Max. 0.05%
Heavy metal (as Pb)
Max. 0.001%
Iron (Fe)
Max. 0.002%
Safety Information & Hazard Symbols
Symbol
GHS05, GHS07
Signal Word
Danger
Hazardous Statement
H302-H318
Precaution Statement
P280-P305 + P351 + P338