NIOSH Pocket Guide to Chemical Hazards

Isobutyl alcohol CAS 78-83-1
(CH3)2CHCH2OH RTECS NP9625000
Synonyms & Trade Names
IBA, Isobutanol, Isopropylcarbinol, 2-Methyl-1-propanol
DOT ID & Guide
1212 129
Exposure
Limits
NIOSH REL: TWA 50 ppm (150 mg/m3)
OSHA PEL: TWA 100 ppm (300 mg/m3)
IDLH 1600 ppm Conversion 1 ppm = 3.03 mg/m3
Physical Description
Colorless, oily liquid with a sweet, musty odor.
MW: 74.1
BP: 227°F
FRZ: -162°F
Sol: 10%
VP: 9 mmHg
IP: 10.12 eV

Sp.Gr: 0.80
Fl.P: 82°F
UEL(202°F): 10.6%
LEL(123°F): 1.7%

Class IC Flammable Liquid: Fl.P. at or above 73F and below 100F.
Incompatibilities & Reactivities
Strong oxidizers
Measurement Methods
NIOSH 1401; OSHA 7
Personal Protection & Sanitation
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 = 10) Any supplied-air respirator*
Up to 1250 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*/(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)*
Up to 1600 ppm: (APF = 50) Any chemical cartridge respirator with a full facepiece and 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 = 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
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
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, throat; headache, drowsiness; skin cracking; in animals: narcosis
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION