Sodium dithionite
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
- SAFETY DATA SHEET (SDS)
- Update Date: 2023-10-26 16:12:11
What is Sodium dithionite?
Description
Sodium dithionite (Na2S2O4) is a white crystalline salt that is also known by the somewhat confusing name sodium hydrosulfite. Its solutions are stable unless heated or acidified. It is produced by reducing NaHSO3 with zinc metal. Na2S2O4 has many industrial uses, including reduction of water-soluble organic compounds, primarily in the dyeing industry.
The Uses of Sodium dithionite
Sodium dithionite is a reducing agent for vat dyes,reducing hair bleaching agents,vat dyes printing auxiliaries, silk scouring and bleaching agents, coloring agents and objects stripping vat cleaning agent, particularly in dyeing with indigo and vat dyes; bleaching soaps, straw; removing dyes from dyed fabrics.
Properties of Sodium dithionite
| 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 |
| Water Solubility | 250 g/L (20 ºC) |
| Sensitive | Moisture Sensitive |
Safety information for Sodium dithionite
| Signal word | Danger |
| Pictogram(s) |
 Flame Flammables GHS02  Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H251:Self-heating substances and mixtures H302:Acute toxicity,oral H319:Serious eye damage/eye irritation |
| Precautionary Statement Codes |
P235:Keep cool. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P270:Do not eat, drink or smoke when using this product. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Sodium dithionite
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Vats International
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ADI Chemsol LLP
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product: Sodium hydrosulfite 7775-14-6 98%
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