Sodium metabisulfite
Product Name: Sodium metabisulfite（Tech grade/ food grade）
CAS NO: 7681-57-4
EC NO: 231-673-0
Molecular Formula: Na2S2O5
Molecular weight： 190.1
H.S code: 283210 0000
Specifications:
| Item | Quality | |
| Food grade | Tech grade | |
| Purity (Na2S2O5) :% | ≥97.5 | ≥97.0 |
| Sulfur dioxide( SO2):% | ≥65.0 | ≥65.0 |
| Arsenic ( As ):% | ≤0.0002 | - |
| Heavy metal (Pb):% | ≤0.0005 | |
| Iron (Fe) : % | ≤0.001 | ≤0.002 |
| Insol. in water: % | ≤0.02 | ≤0.05 |
| PH-value : | 4.0-4.8 | 4.0-4.8 |
| Note :Meet FCC V and E 223 standard | ||
Appearance: White or light yellow crystal powder
Packing: 25/50/1000/1250kg pp woven bags with pe inner
Uses: Dyeing mordant; Dechlorination agent; Reducing agent and sulfonating agent for chemical industry and medicine; Bamboo, wood and paper fiber bleaching agent, mineral processing agent; Wastewater treatment agent, etc.; Food grade is used as preservative, preservative, bleaching agent, etc.
