Class 5 - Division 5.2 Classification

Organic peroxides are classified according to the degree of danger they present. All organic peroxides are classified in Division 5.2 unless the formulation contains one of the following:

• Not more than 1% available oxygen from the organic peroxide when containing not more than 1% hydrogen peroxide
• Not more than 0.5% available oxygen from the organic peroxide when containing more than 1% but not more than 7% hydrogen peroxide

The types of organic peroxides include the following:

• Type A - Any organic peroxide that, as packaged, can deflagrate or detonate rapidly
• Type B - Any organic peroxide that possesses explosive properties that, when packaged, neither detonates nor deflagrates rapidly, but is liable to undergo a thermal explosion
• Type C - Any organic peroxide that possesses explosive properties that, when packaged, cannot detonate or deflagrate rapidly or undergo a thermal explosion
• Type D - Any organic peroxide that detonates partially but does not deflagrate rapidly and shows no violent effects under heated confinement; does not detonate at all, deflagrates slowly, and shows no violent effects under heated confinement; or does not detonate or deflagrate and shows medium effects when under heated confinement
• Type E - Any organic peroxide that neither detonates nor deflagrates at all and shows low or no effect when heated under confinement
• Type F - Any organic peroxide that neither detonates nor deflagrates at all, shows low or no effect when heated under confinement, and has low or no explosive power

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