sodium bisulfite

2.usage:
sodium bisulfite is used in the bleaching of cotton textiles; as reducing agent in dyes, paper-making, leather, chemical synthesis; in the manufacture of pharmaceutical intermediates, photographic developer, food bleacher, antiseptic and anti-oxidants.

3.specifications:
sodium bisulfite standard:hg/t3814-2006
test item
standard request.
inspect result
inspect conclusion
appearance
white crystalline powder
conformed
pass
content (nahso3) %
≥99%
99.1%
pass
so2%
64%-67%
65%
pass
cl%
0.05
0.03
pass
fe%
≤0.004%
0.002%
pass
water insoluble matter%
≤0.03%
0.01%
pass
heavy metal (pb)%
≤0.001%
0.0005%
pass
as%
≤0.0002%
<0.0001%
pass
ph
4.0-5.0
4.3
pass

4.packing details:
sodium bisulfite will be packed in n.w25kg plastic woven bag lined with pe liner,or 500kg/1000kg/1100kg/1200kg jumbo bag.
20mt-25mt will be loaded in 1*20’fcl container.

5.storage:
sodium bisulfite should be stored in cool and dry place, avoid moisture and heat. no breakage, no mixed with oxidant and toxic matter. the storage period is 6 month since the production date. it should be transported by clean car, with covering matter, avoid raining.

7631-90-5