Content:Na2s2o5~98%,water insoluble~0.04%,Fe%~0.004%,As%<0.0002%.

Sodium Metabisulfite Industry(technical) grade and food grade with competitive price

Appearance: white or yellowish crystal powder

Molecular formula: Na2s2o5

Specifications:

1) Sodium metabisulphite : 98% min

2) Iron content: 0.004% max

3) PH:4.4

4) Heavy metal: 0.001% max

5) As: 0.0002% max

6)Water-insoluble matter%: 0.04 max

Net weight: 25kg /bag 50kg /bag 1000kg /bag

Packing: external polypropylene woven bag, polyethylene plastic bag lining.

Main Usage: Producing medicine iodoform, vanillin Photographic fixative, rubber solidifying agent, dechloride agent of bleached fiber, leather treatment of leather making industry, etc