Hexone

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

Formula

CH₃COCH₂CH(CH₃)₂

Conversion

1 ppm = 4.10 mg/m³

IDLH

500 ppm
See: 108101

Exposure Limits

NIOSH REL

TWA 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 Weight

100.2

Boiling Point

242°F

Freezing Point

-120°F

Solubility

Vapor Pressure

16 mmHg

Ionization Potential

9.30 eV

Specific Gravity

0.80

Flash Point

64°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 canister
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

Hexone

NIOSH REL

OSHA PEL

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