soduim metabisulfite

Specifications sodium matebisulfite

lowest content of heavy metal

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Product name: Sodium matebisulfite   1. Monthly output about 5000MT
2.Purity (Na2S2O5): 97% Min
3.SO2 Content: 65% Min
4.CAS No.: 7681-57-4 5. Chemical formula: Na2S2O5 6. Standard: Industrial Grade: HG/T2826-2008, Food Grade: GB1893-2008 7. Physical appearance: White or slightly yellow crystal powder.
Product Specification:

Item	Index
	Technical Grade		Food Grade
	Special	First
Na2S2O5	96.5%min	95.0%min	96.5%min
Iron (Fe)	50ppm%max	100ppm%max	30ppm%max
Clear degree	--	--	Through the test
Water-fast material	0.05%max	0.05%max	--
Heavy metal(Pb)	--	--	5ppm%max
Arsenic(As)	1ppm%max	--	1ppm%max

  Package: Compound plastic woven bag with polyethylene liner, net weight 25kg or 50kg each.   Delivery time: within 12 days after received LC or T/T advance Notice: Store it in aeration and shady place. Not put it together with strong acids, oxidants. Avoid the wrap page being perforated and prevent from water and moisture when conveyed. Exposure to moisture will make it to be oxidized easily to release SO2. Do not store it for long time. Application: Bleaching agent for textiles. Dechlorination agent for bleached textiles. Bleaching agent paper pulps. Bactericide and antiseptic in food industries. Disposal agent for waste water,etc.
Quality-keep time: 6 months.