HazMat Tool — substance information
Reference only — not a shipping paper, placard mandate, or CVI record.
Methyl ethyl ketone peroxide, in solution with more than 9 percent by mass active oxygen
HMT 15 June 2026- UN / ID
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- Hazard class
- Forbidden
- Packing group
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- ERG guide
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- Special provisions
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- Source
- 49 CFR §172 (15 June 2026)
Methyl ethyl ketone peroxide, in solution with more than 9 percent by mass active oxygen
Methyl ethyl ketone peroxide (MEKP) is an organic peroxide with the formula 2O2. MEKP is a colorless oily liquid. It is widely used in vulcanization (crosslinking) of polymers. It is derived from the reaction of methyl ethyl ketone and hydrogen peroxide under acidic conditions Wikipedia
Hazardous Materials Table
Source: 49 CFR §172 (15 June 2026)(3) Hazard classForbidden |
(4) Identification number |
(5) Packing Group |
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(6) Labels — |
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(7) Special Provisions (§172.102)
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(8) Packing Authorizations (§173.***) 
| (8A) Exceptions | — |
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| (8B) Non-bulk | — |
| (8C) Bulk | — |
(9) Quantity Limits
| (9A) Passenger aircraft/rail | — |
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| (9B) Cargo aircraft only | — |
(10) Vessel stowage
| (10A) Location | — |
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| (10B) Other | — |
Segregation chart for load, transport, and storage
This chart shows whether loading, transport, or storage with other hazard classes is permitted, prohibited, or restricted. Based on 49 CFR §177.848.
This Hazmat is classified as "Forbidden". This means the material may not be offered for transportation or transported in the applicable mode of transport.