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427.7.3 Oxidizers and Organic Peroxides
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The total quantity of solid and liquid oxidizers and organic peroxides combined allowed within a laboratory unit, excluding any quantities in a storage room, shall not exceed 40 pounds (18 kg), provided not more than 2 pounds (0.908 kg) of which are Class 3 oxidizers and 1 pound (0.454 kg) of which is Class I organic peroxides.
Exception: The total quantity of solid and liquid oxidizers and organic peroxides combined allowed within a laboratory unit that is provided with walls, floors and ceilings that separate the laboratory unit from all adjoining areas by 2-hour fire rated construction shall not exceed 50 pounds (23 kg), provided not more than 2 pounds (0.908 kg) of which is Class 3 oxidizers and 1 pound (0.454 kg) of which are Class I organic peroxides.
Exception: The total quantity of solid and liquid oxidizers and organic peroxides combined allowed within a laboratory unit that is provided with walls, floors and ceilings that separate the laboratory unit from all adjoining areas by 2-hour fire rated construction shall not exceed 50 pounds (23 kg), provided not more than 2 pounds (0.908 kg) of which is Class 3 oxidizers and 1 pound (0.454 kg) of which are Class I organic peroxides.
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