Class 5 - Oxidizer / Organic Peroxide
Hazard labels of Class 5 mark substances that are oxidizing (5.1) or highly reactive (5.2). These substances pose a significant risk because they can accelerate or intensify fires, or even decompose and ignite on their own. Correct labeling according to ADR, RID, IMDG and IATA is therefore essential to minimize risks during transport, storage and handling.
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The two subclasses of Dangerous Goods Class 5:
- Class 5.1 – Oxidizing Substances (“Oxidizer”)
Oxidizing substances promote combustion by releasing oxygen or supporting chemical reactions that cause other materials to ignite or burn more intensely.
Typical examples: hydrogen peroxide, potassium nitrate, ammonium nitrate, sodium chlorate
Hazards:
- Accelerate fires
- Can ignite materials that are normally not flammable
- Present severe risks when in contact with flammable or organic substances
- Class 5.2 – Organic Peroxides (“Organic Peroxide”)
Organic peroxides are thermally unstable substances that can self‑decompose under heat, friction or impact – often accompanied by explosions or intense heat release. Many are highly flammable and extremely reactive.
Typical examples: MEKP (methyl ethyl ketone peroxide), benzoyl peroxide, organic peroxide resins
Hazards:
- Risk of spontaneous decomposition
- High heat release
- Explosion hazard
- Contact with impurities or metal parts may be dangerous
Our Class 5 hazardous goods labels – robust, compliant with standards and reliable, specially developed for professional use.
- Class 5.1 – Oxidizing Substances (“Oxidizer”)
Oxidizing substances promote combustion by releasing oxygen or supporting chemical reactions that cause other materials to ignite or burn more intensely.
Typical examples: hydrogen peroxide, potassium nitrate, ammonium nitrate, sodium chlorate
Hazards:
- Accelerate fires
- Can ignite materials that are normally not flammable
- Present severe risks when in contact with flammable or organic substances
- Class 5.2 – Organic Peroxides (“Organic Peroxide”)
Organic peroxides are thermally unstable substances that can self‑decompose under heat, friction or impact – often accompanied by explosions or intense heat release. Many are highly flammable and extremely reactive.
Typical examples: MEKP (methyl ethyl ketone peroxide), benzoyl peroxide, organic peroxide resins
Hazards:
- Risk of spontaneous decomposition
- High heat release
- Explosion hazard
- Contact with impurities or metal parts may be dangerous
Our Class 5 hazardous goods labels – robust, compliant with standards and reliable, specially developed for professional use.