مشخصات فنی
| Sodium metabisulfite, Sodium pyrosulfite, Disulfite, Pyrosulfite | Synonym |
|---|---|
|
7681-57-4
|
CAS-No
|
|
231-673-0
|
EC-No
|
|
Na2S2O5
|
Linear formula
|
|
White crystal or crystalline powder
|
Appearance
|
|
650 g/l (20ºC)
|
Solub. in H2O
|
|
4.0-4.8 (50 g/l, H2O, 20ºC)
|
pH value
|
|
190.11 g/mol
|
Molecular Weight
|
|
150ºC (decomposition)
|
Melting point
|
|
1.48 g/cm3
|
Spec. density
|
|
1000-1200 Kg/m3
|
Bulk. Density
|
|
2832-10-00
|
HS-No
|
|
Acute toxicity, Serious eye damage, Danger, H302, H318, EUH031, P280, P305 + P351 + P338, P313 LGK 10 - 13
|
GHS
|
|
Keep container tightly closed in a dry and well-ventilated place
|
Storage Conditions
|
|
≥96.0%
|
Assay
|
|
≤0.0001%
|
Arsenic (As)
|
|
≤0.0005%
|
Iron (Fe)
|
|
≤0.005%
|
Chloride (Cl)
|
|
≤0.0005%
|
Heavy metals (as Pb)
|
|
≤0.05%
|
Thiosulfate (SO4)
|
