Hazard search

Methyl ethyl ketone peroxide

CAS number
1338-23-4
Also known as
2-Butanone peroxide · Ethyl methyl ketone peroxide · MEK peroxide · MEKP · Methyl ethyl ketone peroxide (MEKP)

UK workplace exposure limits

LimitValueApplies to
15-minute STEL 0.2 ppm
15-minute STEL 1.5 mg/m³

Sampling methods

MethodSamplingMedium AnalysisPart numbers
NIOSH 3508
Methyl ethyl ketone peroxide by VIS
Method document (opens in a new tab)
Active (pump) Midget impinger VAS 225-36-1
225-22
OSHA 77
Methyl ethyl ketone peroxide by HPLC/UV
Method document (opens in a new tab)
Active (pump) XAD-4 tube (80/40mg) HPLC-UV 226-93

Methods and limits as published by their agencies and summarised by SKC; check the current method and the limit that applies to you before sampling.

Source: SKC Ltd (UK), Hazard Search, used with SKC's permission (opens in a new tab); SKC Inc. (USA), Sampling Guides, used with SKC's permission (opens in a new tab)