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sodium dithionite
Also known as: Sodium dithionite · SODIUM HYDROSULFITE · 7775-14-6 · Sodium hydrosulphite
- CAS No.
- 7775-14-6
- Formula
- Na2O4S2
- Molar mass
- 174.11 g/mol
- PubChem CID
- 24489
Flammable
Harmful / Irritant
Summary
sodium dithionite (Na2O4S2), CAS 7775-14-6. Common in labs and industry. Read on for hazards, storage, PPE and mixing rules.
Background
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Physical properties
No experimental physical properties indexed yet. Try PubChem for the raw record.
Hazards
Ignites easily when exposed to a flame or spark.
May cause skin, eye or respiratory irritation.
Hazard statements
- H251: Self-heating
- H302: Harmful if swallowed [Warning Acute toxicity, oral]
- H315: Causes skin irritation [Warning Skin corrosion/irritation]
- H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
- H402: Harmful to aquatic life [Hazardous to the aquatic environment, acute hazard]
- H412: Harmful to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]
- H303: May be harmful if swallowed [Warning Acute toxicity, oral]
Storage
Keep at room temperature, below 30 °C, out of direct heat.
Store somewhere well-ventilated and away from any ignition source.
Metal drums or tinted glass, tightly sealed.
Strong acids, strong bases and powerful oxidizers.
Personal protective equipment
Nitrile or butyl, at least 0.4 mm thick.
Safety goggles with side shields.
A2 organic-vapor cartridge if the room isn't well ventilated.
Occupational exposure limits (HSE)
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EU harmonised classification (ECHA C&L)
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Transport
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FDA recalls & enforcement
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Compatibilities
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Open comparator with sodium dithionitePractical safety notes
- Flammable. Keep away from open flames, hot surfaces and sparks. Ground containers when transferring.
- Irritant / harmful. Ventilate the workspace and avoid skin contact.
Derived from the GHS classification shown above. These notes are generic guidance and do not replace the manufacturer's SDS or your local risk assessment.
FAQ
Is sodium dithionite flammable?+
Yes. sodium dithionite (CAS 7775-14-6) carries the GHS02 flame pictogram. Keep it away from ignition sources, use non-sparking tools, and ground metal containers when transferring liquid.
What PPE should I wear when handling sodium dithionite?+
Safety glasses with side shields and nitrile gloves are the baseline. Ventilation should be sufficient to keep vapours below the occupational exposure limit. Check SDS section 8 for material-specific breakthrough times.
How should sodium dithionite be stored?+
Store sodium dithionite (CAS 7775-14-6) in tightly closed original containers, in a cool, dry, well-ventilated area away from incompatible materials. Use a flammable-liquid cabinet and keep away from oxidizers and heat.
Is sodium dithionite dangerous for the environment?+
No specific environmental pictogram (GHS09) is listed in our records for sodium dithionite, but any chemical waste should be handled through your site's hazardous-waste procedure, not poured down the drain.
Where can I find the official Safety Data Sheet for sodium dithionite?+
Official, up-to-date SDS documents are published by each manufacturer (Sigma-Aldrich, Merck, Thermo Fisher, VWR, Carl Roth, etc.) and by regulators such as ECHA and NIOSH. This page is an educational summary and does not replace the manufacturer's SDS.
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