1.industry sodium pyrosulfite 2Classification: Sulphate 3 Type: Sodium Metabisulfite 4 CAS No.: 7681-57-4
1.industry sodium pyrosulfite 2Classification: Sulphate 3 Type: Sodium Metabisulfite 4 CAS No.: 7681-57-4 5 MF: Na2S2O5
1industry sodium pyrosulfite Classification: Sulphate | Type: Sodium Metabisulfite | CAS No.: 7681-57-4 |
| Other Names: metabisulfite | MF: Na2S2O5 | EINECS No.: 231-673-0 |
| Place of Origin: Shandong China (Mainland) | Grade Standard: Agriculture Grade, Food Grade, ... | Purity: 98% |
| Appearance: white | Application: chemical meterial | Brand Name: YY |
| Model Number: M-008 | crystal: white |
| Packaging Detail: | Packed in 25kg plastic woven bag, 25kg Kraft paper bag, 25kg PE bag, |
| Delivery Detail | Within 10-15days after payment |
1.Both food & tech grade 2.Steady high quality 3.Nicest price &Good service 4.Prompt delivery
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.Molecular Formula : Na2S2O5
Molecule Weight : 190.12
CAS NO .: 7681-57-4
Appearance : White Free Flowing Fine Crystal or Powder
Packing: 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.
Specification For Food Grade and Industry Grade :
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 | |
Specification for Pharmaceutical Grade and Photo Grade
Item | Quality Index | |
Pharmaceutical Grade | Photo Grade | |
Purity ( As Na2S2O5) | 98.0% min | 98.0% min |
Sulfur Dioxide( SO2) | 65.0% min | 65.0% min |
Thiosulphate ( As S2O3) : | 0.05 % max | 0.05% max |
Chloride ( As CL-) : | 30 ppm max | 50ppm max |
Arsenic ( As ) : | 1ppm max | 1ppm max |
Lead ( Pb ) : | 1 ppm max | 2ppm max |
Copper (Cu) : | 1 ppm max | 1ppm max |
Iron (Fe ) : | 5 ppm max | 5ppm max |
Mercury (Hg) : | 0.1ppm max | 1ppm max |
Chromium (Cr) : | 1 ppm max | - |
Selenium (Se ) : | 1 ppm max | 5ppm max |
Zinc (Zn) | 1 ppm max | 1ppm max |
Cadmium (Cd ) | 1ppm max | - |
Nickel (Ni) | 1ppm max | - |
Na2SO3 + Na2SO4 | 1.5% max | - |
PH value : | 4.0-4.8 | 4.0-4.8 |
Remark : | Conformed with USP standard | |
good supplier of Sodium pyrosulfite/Sodium Metabisulfite Na2S2O5
