1.Industry grade sodium metabisulphite

Purity(calculated with the amount of Na2S2O5 ) 95%	Iron(Fe) 0.005%
PH value:4.0-4.6	Water-fast matter 0.05%
(SO 2 65%)	----

Uses: Mainly used for producing medicine iodoform, sola sulfone, vanillin Photogra0phical fixative, rubber solidifying agent, dechloride agent of bleached fiber, leather treatment of leathermaking industry, etc.
Packing: 25kgs,50kgs per each woven bag with plastic lining or 1000kgs per each package 

2.Feed grade sodium metabisulphite

Purity(calculated with the amount of Na2S2O5 ) 95%	Iron(Fe) 0.0005%
Water-fast matter 0.05%	Arsenic (As) 0.0002%
Heavy metal (Cal. in Pb) 0.002%	PH value:4.0-4.6

Uses: Mainly used for manufacturing sulfurous acid and bactericidal, Carrying out vegetable dehydrate, fruit preservation and bleaching. Packing: Net Weight 25kgs or 50kgs with plastic woven bag; or 1000kgs big bags.