| CAS No. | : 7681-57-4 |
| Original | : CHINAPacking: 25kg in net PP bag, 22MT in the 20′FCL |
| Formula | : Na2S2O5 |
SMBS 64% Tech Grade
SMBS (as SO2), %min64
Fe, %max 0.005
Water-insol Matter, %max 0.05
PH 4.0-4.6
SMBS 64% Food Grade
SMBS (as SO2), %min 64
Fe, %min 0.005
Water-insol Matter, %max 0.05
PH 4.0-4.6
Pb, %max 0.002%
As,%max 0.0002%
Sodium metabisulfite or sodium pyrosulfite Is an inorganic compound of chemical formula Na2S2O5. The name is sometimes referred to as disodium (metabisulfite, etc). It is used as a disinfectant, antioxidant and preservative agent.
When mixed with water, sodium metabisulfite releases sulfur dioxide (SO2), a pungent, unpleasant smelling gas that can also cause breathing difficulties in some people. For this reason, sodium metabisulfite has fallen from common use in recent times, with agents such as hydrogen peroxide becoming more popular for effective and odorless sterilization of equipment. Released sulfur dioxide however makes the water a strong reducing agent.