T9897530
Sodium Hydrosulfite , >85.0%(T) , 7775-14-6
Synonym(s):
Sodium dithionite;Sodium hydrosulfite;Sodium hydrosulfite, Sodium hypodisulfite;Sodium hypodisulfite
CAS NO.：7775-14-6
Empirical Formula: Na2O4S2
Molecular Weight: 174.11
MDL number: MFCD00011640
EINECS: 231-890-0
Update time: 2022-07-08
PRODUCT Properties
| Melting point: | 300 °C |
| Boiling point: | 1390°C |
| Density | 2.13 |
| Flash point: | >100°C |
| storage temp. | Store at +5°C to +30°C. |
| solubility | 250 g/L (20°C) |
| form | Powder/Solid |
| color | White |
| PH | 5.5-8.5 (50g/l, H2O, 20℃) |
| Odor | None or slight scent of sulfur dioxide |
| Water Solubility | 250 g/L (20 ºC) |
| Sensitive | Moisture Sensitive |
| Merck | 14,8626 |
| Stability: | Stable, but air sensitive. Incompatible with strong acids, strong oxidizing agents, water, moisture. |
| LogP | -2.756 (est) |
Description and Uses
Sodium hydrosulfite is used as a reducing agent in aqueous solutions, sulfonating agent , chelating agent and decolorizing agent in organic reactions. It finds application in water treatment, gas purification, cleaning, leather, polymers, photography, and many others. It is involved in chemical enhanced oil recovery to stabilize polyacrylamide polymers against radical degradation in the presence of iron. It plays an important role to determine the iron content in soil chemistry.
Safety
| Symbol(GHS) |   GHS02,GHS07 |
| Signal word | Danger |
| Hazard statements | H251-H302-H319 |
| Precautionary statements | P235-P264-P270-P280-P301+P312-P305+P351+P338 |
| Hazard Codes | Xn |
| Risk Statements | 7-22-31 |
| Safety Statements | 26-28-43-7/8-43E-28A |
| RIDADR | UN 1384 4.2/PG 2 |
| WGK Germany | 1 |
| F | 1-10 |
| Autoignition Temperature | >200 °C |
| TSCA | Yes |
| HazardClass | 4.2 |
| PackingGroup | II |
| HS Code | 28311010 |
| Toxicity | LD50 orally in Rabbit: 2500 mg/kg |
