Name Sodium metabisulfite
Synonyms Sodium pyrosulfite; Disodium disulphite; Disulfurous acid disodium salt; Pyrosulfurous acid disodium salt
Molecular Formula Na2S2O5
Molecular Weight 190.10
CAS Registry Number 7681-57-4
EINECS 231-673-0
Density 1.48
Melting point 150 ºC
Water solubility 540 g/L (20 ºC)
Use:
Industrial used for printing and dyeing, organic synthesis, printing, the leather making, pharmaceutical and other department. In food processing of bleaching agent and antiseptic, osteoporosis agent.
Test item Specification
Reagent grade Pharmaceutical grade
Appearance Conform Conform
Assay /% �95.0 �92.0
Clarify degrees test Conform Conform
