Usage:
Food: preservative, bleach, loosening agent
Industrial: It used in dyeing and printing industry, organic synthesis,
printing, leather, pharmaceutical and other sectors
Storage:kept in a light-proof,well-colsed,dry and cool place.
Specification:
Item | Quality Index |
Food Grade | Industry Grade |
Purity ( As Na2S2O5) | 98.0% min | 96.0% min |
Sulfur Dioxide( SO2) | 65.0% min | 65.0% min |
Arsenic ( As ) | 0.0002% max | - |
Heavy metals ( As Pb ) | 0.0005% max | - |
Selenium (Se ) | 0.0005% max | - |
Iron (Fe) | 0.001% max | 0.002% max |
Water insoluble | 0.02% max | 0.05% max |
PH value : | 4.0-4.8 | 4.0-4.8 |
Remark : | Conformed with FCC V and E 223 Standard |
Application:
(1) Food Grade: Bleach agent (e.g. candies, cake, bamboo shoots, etc);
Loose agent (e.g. bread, cracker etc);
Inhibitor and freshen agent (e.g. day lily, seafood, fruit and vegetable etc).
(2) Industry Grade: Mordant of printing and dyeing; Dechlorinate of textile
after bleaching; Sulphonated agent and reducer of chemical industry and
pharmacy; Bleach of paper pulp, bamboo and timber bleach of Stap;
3)Medical Grade : It is is an antioxidant additive in inject able
medicines and is also used as a reducing agent in pharmaceuticals
