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Educational content for trained professionals. Not a Safety Data Sheet, not medical advice. In an emergency, call your local poison control or emergency services immediately. Terms of use.

Nitrous Oxide

Also known as: nitrous oxide · Laughing gas · Dinitrogen oxide · Dinitrogen monoxide

CAS No.
10024-97-2
Formula
N2O
Molar mass
44.013 g/mol
PubChem CID
948
GHS pictograms
GHS pictogram: OxidizingOxidizing
GHS pictogram: Compressed gasCompressed gas
GHS pictogram: Harmful / IrritantHarmful / Irritant
GHS pictogram: Health hazardHealth hazard
2D structure of Nitrous Oxide
2D structure · PubChem CID 948

Summary

Nitrous Oxide (N2O), CAS 10024-97-2. Common in labs and industry. Read on for hazards, storage, PPE and mixing rules.

Background

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Hazards

GHS pictogram: Oxidizing
Oxidizing (GHS03)

May cause or intensify fire.

GHS pictogram: Compressed gas
Compressed gas (GHS04)

Contents under pressure, may explode if heated.

GHS pictogram: Harmful / Irritant
Harmful / Irritant (GHS07)

May cause skin, eye or respiratory irritation.

GHS pictogram: Health hazard
Health hazard (GHS08)

Serious long-term health effects (CMR, respiratory sensitizer).

Hazard statements

  • H270: May cause or intensify fire
  • H280: Contains gas under pressure
  • H281
  • H336: May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure
  • H360: May damage fertility or the unborn child [Danger Reproductive toxicity]
  • H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]

Storage

Temperature

Keep at room temperature, below 30 °C, out of direct heat.

Ventilation

Store somewhere well-ventilated and away from any ignition source.

Containers

Metal drums or tinted glass, tightly sealed.

Keep away from

Strong acids, strong bases and powerful oxidizers.

Personal protective equipment

Gloves

Nitrile or butyl, at least 0.4 mm thick.

Eye protection

Safety goggles with side shields.

Respirator

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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Practical safety notes

  • Oxidizing. Keep away from combustibles, organics, reducers and fuels.
  • Compressed gas. Secure cylinders upright, protect valves, store in ventilated areas.
  • 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.

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 Nitrous Oxide flammable?+

Nitrous Oxide (CAS 10024-97-2) 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 Nitrous Oxide?+

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 Nitrous Oxide be stored?+

Store Nitrous Oxide (CAS 10024-97-2) in tightly closed original containers, in a cool, dry, well-ventilated area away from incompatible materials.

Is Nitrous Oxide dangerous for the environment?+

No specific environmental pictogram (GHS09) is listed in our records for Nitrous Oxide, 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 Nitrous Oxide?+

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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