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Class-5-Organic-Peroxides-5.1

Published by California Department of Toxic Substances Control | State of California | Metadata Last Checked: August 21, 2025 | Last Modified: 2020-02-06T17:00:28.000Z
Hazard Class 5: Class 5 hazards are oxidizing chemicals that could be prone to combustion. There are two divisions to this class — oxidizers and organic peroxides — marked as 5.1 and 5.2, respectively. Oxidizers are designated with a yellow label, with the hazard class number 5.1 at the bottom and the oxygen logo at the top. Organic peroxides are noted with a half-red and half-yellow truck placard, with a flammable graphic at the top in the red portion. The hazard class No. 5.2 is located at the bottom.

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