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Products

Sodium Metabisulphite

Molecular formula

Na₂S₂O₅

Molecular weight

190.10

Executive standard

HG/T2826-2008

Packing

25KGS PP/PE bags or 1000kg/1350kgs/jumbo bags

Uses

It is mainly used as bleaching agent, mordant, reducing agent and rubber coagulant; In the pharmaceutical industry, it is used to produce chloroform, phenylpropanesulfone and benzaldehyde; rubber Rubber industry as coagulant; In printing and dyeing industry, it is used as dechlorinating agent and scouring agent for cotton cloth after bleaching; In leather industry, it can make leather soft, plump, tough, waterproof and wear-resistant; In chemical industry, it is used to produce hydroxyvanillin, hydroxylamine hydrochloride, etc.; in photosensitive industry, it is used as developer, etc.

Features

in dry and ventilated warehouse Keep container tightly closed, store in cool, dry and well ventilated warehouse, avoid direct sun light and in compatible chemicals.

Quality index

Item	Tech grade	Food grade
Appearance	White to yellowish crystalline powder	White to yellowish crystalline powder
Odor	An odor of sulfur dioxide	An odor of sulfur dioxide
Purity(Na₂S₂O₅)	97.0% min	97.0% min
SO₂	65.3% min	65.3% min
Na₂SO₄	3.0% max	3.0% max
Iron(Fe)	50.0ppm max	30.0ppm max
Lead(Pb)	20.0ppm max	5.0ppm max
Arsenic(As)	1.0ppm max	1.0ppm max
Insolubility	0.05% max	0.05% max
PH	4.0-4.8	4.0-4.8