Sodium metabisulfite CAS NO.7681-57-4

name:

industrial used sodium metabisulfit

appearance:

white free flowing fine crystal or powder

specification:

industrial grade

1) purity (calculated with na2s2o5): 95%

2) iron (fe): 0.005%

3) so2: 65%

4) ph value: 4.0-4.6

5)water insoluble matter: 0.05%

foodstuff grade

1) purity (calculated with na2s2o5): 95%

2) iron (fe): 0.0005%

3) arsenic (as): 0.0002%

4) ph value: 4.0-4.6

5) water insoluble matter: 0.05%

6) heavy metal (cal. in pb): 0.002%

package:

25kg, 50kg pp woven bag with plastic lining, or 1000kg per package

usage:

1.dye printing mordant.

2.textile antichlor after being bleached.

3.reducing agent and sulfonating agent for chemical and medical use.

4.bamboo, wood, paper fiber bleaching agent, non-ferrous metal ore dressing agent, waste water treating , rubber freezing agent.