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Methyl Ethyl Ketone Peroxide

General Description

Synonyms: 2-Butanone peroxide; MEKP; MEK Peroxide

OSHA IMIS code: 1750

CAS number: 1338-23-4

Exposure Limits and Health Effects (Updated September 6, 2012)

Standard Set By Exposure Limit Health Effect Codes -- Health Effects and Target Organs
OSHA PEL Not established
 
NIOSH REL 0.2 ppm (1.5 mg/m3) Ceiling HE3 -- lung, liver, and kidney damage
HE14 -- eye and skin irritation
ACGIH TLV® (1992) 0.2 ppm (1.5 mg/m3) Ceiling HE3 -- liver and kidney effects
HE14 -- skin and eye irritation
CAL/OSHA PELs

0.2 ppm (1.5 mg/m3) Ceiling

HE3 -- liver and kidney effects
HE14 -- skin and eye irritation

Carcinogenic classification:

  • NTP: Not listed
  • IARC: Not listed
  • EPA: Not listed

EPA Inhalation Reference Concentration (RfC): Not established

ATSDR Inhalation Minimal Risk Levels (MRLs): Not established

NIOSH IDLH concentration: Not established

Notes on other potential health effects and hazards:

  1. Methyl ethyl ketone (MEK) peroxide is combustible and gives off irritating and toxic fumes when ignited (NIOSH/IPCS 2005).
  2. MEK peroxide can be absorbed through the skin and can cause hemolytic anemia (Lefaux 1968).
  3. MEK peroxide may cause allergic contact dermatitis (Minamoto et al. 2002).

Partial reference list:

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Methyl Ethyl Ketone Peroxidase. 2016.
  • Lefaux, R.: Practical Toxicology of Plastics. Cleveland: CRC Press Inc., p. 145, 1968.
  • Minamoto, K., Nagano, M., Inaoka, T., Futatsuka, M.: Allergic contact dermatitis due to methyl ethyl ketone peroxide, cobalt naphthenate and acrylates in the manufacture of fiberglass-reinforced plastics. Contact Dermatitis. 46(1):58-9, Jan 2002.
  • NIOSH: Recommendations for Occupational Safety and Health - Compendium of Policy Documents and Statements. 2008.
  • NIOSH/CEC/IPCS: International Chemical Safety CardsMethyl Ethyl Ketone Peroxide. October 19, 2005.

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