مشخصات فنی
| sulfurous acid, sodium salt | Synonym |
|---|---|
|
7757-83-7
|
CAS-No
|
|
231-821-4
|
EC-No
|
|
Na2SO3
|
Linear formula
|
|
White crystalline powder or colourless crystals
|
Appearance
|
|
220 g/l (20ºC)
|
Solub. in H2O
|
|
8.8-10 (50 g/l, H2O, 20ºC)
|
pH value
|
|
126.04 g/mol
|
Molecular Weight
|
|
>500ºC (decomposition)
|
Melting point
|
|
2.63 g/cm3
|
Spec. density
|
|
1480 Kg/m3
|
Bulk. Density
|
|
2832-10-00
|
HS-No
|
|
Acute toxicity, eye irritation, Skin corrosion, H302, H314, H315, H319, P260, P264, P270, P280, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P330 LGK 10 - 13
|
GHS
|
|
Keep container tightly closed in a dry and well-ventilated place
|
Storage Conditions
|
|
≥ 98.0%
|
Assay (iodometric)
|
|
≤0.0001%
|
Arsenic (As)
|
|
≤0.001%
|
Copper (Cu)
|
|
≤0.001%
|
Heavy metals (as Pb)
|
|
≤0.0005%
|
Lead (Pb)
|
|
≤0.001%
|
Iron (Fe)
|
|
≤0.0001%
|
Mercury (Hg)
|
|
≤0.001%
|
Selenium (Se)
|
|
≤0.001%
|
Zinc (Zn)
|
|
≤0.02%
|
Chloride (Cl)
|
|
≤0.05%
|
Thiosulfate (S2O3)
|
|
≤0.15%
|
Free alkali (as Na2CO3)
|
