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sodium nitrite
Also known as: SODIUM NITRITE · 7632-00-0 · Nitrous acid, sodium salt · Nitrite, sodium
- CAS No.
- 7632-00-0
- Formula
- NNaO2
- Molar mass
- 68.995 g/mol
- PubChem CID
- 23668193
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Oxidizing
Toxic
Harmful / Irritant
Health hazard
Environmental hazard
Summary
sodium nitrite (NNaO2), CAS 7632-00-0. 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
May cause or intensify fire.
May be fatal even in small doses.
May cause skin, eye or respiratory irritation.
Serious long-term health effects (CMR, respiratory sensitizer).
Toxic to aquatic organisms.
Hazard statements
- H272: May intensify fire
- H301: Toxic if swallowed [Danger Acute toxicity, oral]
- H400: Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
- H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
- H341: Suspected of causing genetic defects [Warning Germ cell mutagenicity]
- H361: Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity]
- H362: May cause harm to breast-fed children [Reproductive toxicity, effects on or via lactation]
- H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]
- H373: May causes damage to organs through prolonged or repeated exposure [Warning Specific target organ toxicity, repeated exposure]
- H410: Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]
- H330: Fatal if inhaled [Danger Acute toxicity, inhalation]
- H371: May cause damage to organs [Warning Specific target organ toxicity, single exposure]
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 nitritePractical safety notes
- Oxidizing. Keep away from combustibles, organics, reducers and fuels.
- Acute toxicity. Work under a fume hood, restrict access, keep a specific antidote plan available.
- Irritant / harmful. Ventilate the workspace and avoid skin contact.
- Serious health hazard (carcinogen, mutagen, reprotoxic, respiratory sensitizer). Substitute if possible; otherwise closed systems and medical surveillance.
- Environmental hazard. Do not release to sewers or waterways; collect for hazardous waste disposal.
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 nitrite flammable?+
sodium nitrite (CAS 7632-00-0) does not carry the GHS02 flame pictogram in our records. Always confirm with the manufacturer's SDS section 9 (flash point) before assuming a product is non-flammable.
What PPE should I wear when handling sodium nitrite?+
Safety glasses with side shields and nitrile gloves are the baseline. Work inside a fume hood or use a suitable respirator. Check SDS section 8 for material-specific breakthrough times.
How should sodium nitrite be stored?+
Store sodium nitrite (CAS 7632-00-0) in tightly closed original containers, in a cool, dry, well-ventilated area away from incompatible materials.
Is sodium nitrite dangerous for the environment?+
Yes. sodium nitrite carries the GHS09 environment pictogram. Do not release to drains, soil or waterways; collect residues for hazardous-waste disposal in line with local regulations.
Where can I find the official Safety Data Sheet for sodium nitrite?+
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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