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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.

Benzoyl Peroxide

Also known as: BENZOYL PEROXIDE · 94-36-0 · Dibenzoyl peroxide · Benzoyl superoxide

CAS No.
94-36-0
Formula
C14H10O4
Molar mass
242.23 g/mol
PubChem CID
7187
GHS pictograms
GHS pictogram: ExplosiveExplosive
GHS pictogram: FlammableFlammable
GHS pictogram: OxidizingOxidizing
GHS pictogram: Harmful / IrritantHarmful / Irritant
GHS pictogram: Environmental hazardEnvironmental hazard
2D structure of Benzoyl Peroxide
2D structure · PubChem CID 7187

Summary

Benzoyl Peroxide (C14H10O4), CAS 94-36-0. Common in labs and industry. Read on for hazards, storage, PPE and mixing rules.

Background

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Hazards

GHS pictogram: Explosive
Explosive (GHS01)

May explode when exposed to heat, shock or flame.

GHS pictogram: Flammable
Flammable (GHS02)

Ignites easily when exposed to a flame or spark.

GHS pictogram: Oxidizing
Oxidizing (GHS03)

May cause or intensify fire.

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

May cause skin, eye or respiratory irritation.

GHS pictogram: Environmental hazard
Environmental hazard (GHS09)

Toxic to aquatic organisms.

Hazard statements

  • H241: Heating may cause a fire or explosion [Danger Self-reactive substances and mixtures
  • H317: May cause an allergic skin reaction [Warning Sensitization, Skin]
  • H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
  • H400: Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
  • H410: Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]
  • H242
  • H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure
  • H316: Causes mild skin irritation [Warning Skin corrosion/irritation]

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

  • Explosive. Keep away from shock, friction, sparks and heat. Store in dedicated magazines.
  • Flammable. Keep away from open flames, hot surfaces and sparks. Ground containers when transferring.
  • Oxidizing. Keep away from combustibles, organics, reducers and fuels.
  • Irritant / harmful. Ventilate the workspace and avoid skin contact.
  • 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 Benzoyl Peroxide flammable?+

Yes. Benzoyl Peroxide (CAS 94-36-0) 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 Benzoyl Peroxide?+

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 Benzoyl Peroxide be stored?+

Store Benzoyl Peroxide (CAS 94-36-0) 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 Benzoyl Peroxide dangerous for the environment?+

Yes. Benzoyl Peroxide 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 Benzoyl Peroxide?+

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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