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Methyl ethyl ketone peroxide																				Related Pages
Synonyms & Trade Names
			2-Butanone peroxide, Ethyl methyl ketone peroxide, MEKP, MEK peroxide, Methyl ethyl ketone hydroperoxide
CAS No.
			1338-23-4
	RTECS No.
			EL9450000
	DOT ID & Guide

FormulaC8H16O4
	Conversion
			1 ppm = 7.21 mg/m3
	IDLH
			N.D.See: IDLH INDEX

Exposure Limits
			NIOSH RELC 0.2 ppm (1.5 mg/m3)
					OSHA PEL none See Appendix G
	Measurement Methods
			**NIOSH** 3508;**OSHA** 77
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless liquid with a characteristic odor.
					[Note: Explosive decomposition occurs at 230°F.]													
										
Molecular Weight176.2	
	Boiling Point244°F (Decomposes)
	Freezing Point?
	SolubilitySoluble
	Vapor Pressure?
	Ionization Potential?											
Specific Gravity(59°F): 1.12	
	Flash Point(oc) 125-200°F (60% MEKP)
	Upper Explosive Limit?
	Lower Explosive Limit?
Combustible Liquid
Incompatibilities & Reactivities
			Organic materials, heat, flames, sunlight, trace contaminants
					[Note: A strong oxidizing agent. Pure MEKP is shock sensitive. Commercial product is diluted with 40% dimethyl phthalate, cyclohexane peroxide, or diallyl phthalate to reduce sensitivity to shock.]
Exposure Routes
			inhalation, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin, nose, throat; cough, dyspnea (breathing difficulty), pulmonary edema; blurred vision; blisters, scars skin; abdominal pain, vomiting, diarrhea; dermatitis; In Animals: liver, kidney damage
Target Organs
			Eyes, skin, respiratory system, liver, kidneys
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**When contaminated
							**Remove:**When wet or contaminated
							**Change:**No recommendation
							**Provide:**Eyewash, Quick drench
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Water wash immediately
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			Not available.
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 1028

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
Introduction
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Chemical Names, Synonyms and Trade Names
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CAS Numbers
RTECS Numbers
Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
First Aid Procedures Follow NIOSH Facebook
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