Sodium Metabisulphite Industry Grade
CAS Registry Number: 7681-57-4 | Formula: Na2S2O5
Applications
Molecular Formula : Na2S2O5
Molecule Weight : 190.12
CAS NO .: 7681-57-4
Property: white or light yellow crystal powder, a strong smell of sulfur dioxide,relative density is 1.4, easy to dissolve in water and glycerin, water solution. It has acidity,and its solubility will become large while raising the temperature and is less to dissolve in ethanol.
|
Item |
Specification |
Test Result |
|
Purity(As Na2S2O5) |
≥95.0% |
≥96.0% |
|
Sulfur Dioxide(SO2) |
≥64.0% |
≥65.0% |
|
Arsenic(As) |
≤0.0001% |
≤0.0001% |
|
Heavy Metals(As Pb) |
≤0.0005% |
≤0.0004% |
|
Iron(Fe) |
≤0.01% |
≤0.005% |
|
PH Value |
4.0-4.8 |
4.5 |
Application: Dyeing and printing mordant; dechlorinating agent for fabrics after bleaching; reducing agent and sulfonating agent for chemical and pharmaceutical industries; bleaching agent for bamboo, wood and paper fibers; non-ferrous metal mineral processing agent; wastewater treatment agent; rubber coagulant; used as alkyl aromatic aldehyde in perfume industry; used as depilatory agent, softener and wear-resistant agent in leather industry; used as reducing agent for developer and protective agent for fixing solution in photographic industry.
Storage: Store in a dry and cool place.
Packaging:Packed in 25kg plastic woven bag, 25kg Kraft paper bag, 25kg PE bag, 500kg/1000kg/1100kg/1200kg jumbo bag or as per the buyer's requirement.