NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Methyl isobutyl carbinol



Synonyms & Trade Names

Isobutylmethylcarbinol, Methyl amyl alcohol, 4-Methyl-2-pentanol, MIBC
DOT ID & Guide
2053 / 129


NIOSH REL: TWA 25 ppm (100 mg/m3) ST 40 ppm (165 mg/m3) [skin]
OSHA PEL: TWA 25 ppm (100 mg/m3) [skin]
400 ppm See: 108112
1 ppm = 4.18 mg/m3
Physical Description
Colorless liquid with a mild odor.
MW: 102.2
BP: 271°F
FRZ: -130°F
Sol: 2%
VP: 3 mmHg
IP: ?

Sp.Gr: 0.81
Fl.P: 106°F
UEL: 5.5%
LEL: 1.0%

Class II Combustible Liquid: Fl.P. at or above 100F and below 140F.
Incompatibilities & Reactivities

Strong oxidizers
Measurement Methods
NIOSH 1402, 1405; OSHA 7
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
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 promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations
Up to 250 ppm:
(APF = 10) Any supplied-air respirator*
Up to 400 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode*
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator 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
(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
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Irritation eyes, skin; headache, drowsiness; dermatitis; in animals: narcosis
Target Organs
Eyes, skin, central nervous system
See also: INTRODUCTION   See ICSC CARD: 0665