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5-Methyl-3-heptanone																				Related Pages
Synonyms & Trade Names
			Amyl ethyl ketone, Ethyl amyl ketone, 3-Methyl-5-heptanone
CAS No.
			541-85-5
	RTECS No.
			MJ7350000
	DOT ID & Guide
			2271 128

FormulaC2H5COCH2CH(CH3)CH2CH3
	Conversion
			1 ppm = 5.24 mg/m3
	IDLH
			100 ppmSee: 541855

Exposure Limits
			NIOSH RELTWA 25 ppm (130 mg/m3)
					OSHA PEL TWA 25 ppm (130 mg/m3)
	Measurement Methods
			**NIOSH** 1301 , 2553
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless liquid with a pungent odor.													
										
Molecular Weight128.2	
	Boiling Point315°F
	Freezing Point-70°F
	SolubilityInsoluble
	Vapor Pressure2 mmHg
	Ionization Potential?											
Specific Gravity0.82	
	Flash Point138°F
	Upper Explosive Limit?
	Lower Explosive Limit?
Class II Combustible Liquid: Fl.P. at or above 100°F and below 140°F.
Incompatibilities & Reactivities
			Strong oxidizers
Exposure Routes
			inhalation, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin, mucous membrane; headache; narcosis, coma; dermatitis
Target Organs
			Eyes, skin, respiratory system, central nervous system
										
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
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Water flush
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			**NIOSH/OSHA****Up to 100 ppm**: (APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s)*(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)*(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister(APF = 10) Any supplied-air respirator*(APF = 50) Any self-contained breathing apparatus with a full facepiece**Emergency or planned entry into unknown concentrations or IDLH conditions:** (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus**Escape:** (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canisterAny appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 1391

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
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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
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