Sodium Metabisulphite AR 500G

Chemical Name: Sodium Metabisulphite
Synonyms: Sodium Pyrosulphite, Disodium Disulphite
Chemical Formula: Na₂S₂O₅
Molecular Weight: 190.10 g/mol
CAS Number: 7681-57-4
Appearance: White to slightly yellow crystalline powder
Odor: Pungent (like sulfur dioxide)