Basic Info.
Product Description
Sodium Pyrosulfite Factory Price 96.5% Sodium Metabisulfite Food or Industry Grade CAS 7681-57-4
Product Name: Sodium Metabisulfite
CAS No.: 7681-57-4
EINECS No.: 231-673-0
HS Code: 28321090
Appearance: White powder or little yellow powder
Classification: Sulfite
Type: Sodium Sulfite
Other Names:
Sodium pyrosulfite; disodium disulphite; Sodium metabisulphite; Sodium disulphite; Sodium pyrosulphite; SODIUM DISULFITE; disodium oxidosulfanesulfonate oxide; Sodium Metabi; Metabisulfite Sodium;
MF:Na2S2O5
Place of Origin: Huangshi, Hubei, China (Mainland)
Grade Standard: Industrial Grade
Purity: 97% min.
Properties: It has sulfur dioxi taste, acidity and saltiness.
Supplying ability:400,000 Metric Tons per year High Quality Manufacturer Industrial Sodium Metabisulfite
1. Chemical industry
Used in the production of insurance powder, sulfamethazine, a caprolactam, etc., as well as the purification of chlorofor, phenylpropane sulfone and benzaldehyde. The photographic industry is used as an ingredient in fixers. The perfume industry is used to produce vanillin. Used as a preservative for brewing industry, a rubber coagulant and a bleaching agent for cotton bleaching. Organic intermediates, dyes, and tanning are used as reducing agents for electroplating, wastewater treatment in oil fields, and as a mineralizer for mines.
2. industry
It is used in printing and dyeing, organic synthesis, printing, tanning, pharmaceutical and other departments; as a preservative, bleaching agent and loosening agent in food processing.
3. Used as a chemical reagent
(Printing and dyeing, photography, etc.), used as bleach mordant, reducing agent rubber coagulant, also used in organic synthetic pharmaceuticals and spices.
Component | Industrial Grade | Food Grade | Medicine Grade |
Appearance | White or yellowish crystalline powder | ||
Assay(Na2S2O5 ) | 96.5%min | 97%min | 98%min |
water insoluble matter | 0.05%max | 0.03%max | 0.02%max |
Iron content(Fe) | 0.005%max | 0.003%max | 0.002%max |
Arsenic content(As) | 0.0001%max | 0.0001%max | 0.0001%max |
Pb | 0.0005%max | 0.0005%max | 0.0003%max |