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Hexone																				Related Pages
Synonyms & Trade Names
			Isobutyl methyl ketone, Methyl isobutyl ketone, 4-Methyl 2-pentanone, MIBK
CAS No.
			108-10-1
	RTECS No.
			SA9275000
	DOT ID & Guide
			1245 127

FormulaCH3COCH2CH(CH3)2
	Conversion
			1 ppm = 4.10 mg/m3
	IDLH
			500 ppmSee: 108101

Exposure Limits
			NIOSH RELTWA 50 ppm (205 mg/m3) ST 75 ppm (300 mg/m3)
					OSHA PEL TWA 100 ppm (410 mg/m3) See Appendix G
	Measurement Methods
			**NIOSH** 1300 , 2555;**OSHA** 1004
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless liquid with a pleasant odor.													
										
Molecular Weight100.2	
	Boiling Point242°F
	Freezing Point-120°F
	Solubility2%
	Vapor Pressure16 mmHg
	Ionization Potential9.30 eV											
Specific Gravity0.80	
	Flash Point64°F
	Upper Explosive Limit(200°F): 8.0%
	Lower Explosive Limit(200°F): 1.2%
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities
			Strong oxidizers, potassium tert-butoxide
Exposure Routes
			inhalation, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin, mucous membrane; headache, narcosis, coma; dermatitis; In Animals: liver, kidney damage
Target Organs
			Eyes, skin, respiratory system, central nervous system, liver, kidneys
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**When contaminated
							**Remove:**When wet (flammable)
							**Change:**No recommendation
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Water flush promptly
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			**NIOSH****Up to 500 ppm**: (APF = 10) Any chemical cartridge 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 = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and organic vapor cartridge(s)*(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: 0511
					  MEDICAL TESTS: 0134

			
							

			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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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
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