# NIOSH Pocket Guide to Chemical Hazards
n-Butyl alcohol | CAS 71-36-3
CH3CH2CH2CH2OH | RTECS EO1400000
Synonyms & Trade Names 1-Butanol, n-Butanol, Butyl alcohol, 1-Hydroxybutane, n-Propyl carbinol | DOT ID & Guide 1120 129
Exposure Limits | NIOSH REL: C 50 ppm (150 mg/m3) [skin]
OSHA PEL†: TWA 100 ppm (300 mg/m3)
IDLH 1400 ppm [10%LEL] | Conversion 1 ppm = 3.03 mg/m3
Physical Description Colorless liquid with a strong, characteristic, mildly alcoholic odor.
MW: 74.1 | BP: 243°F | FRZ: -129°F | Sol: 9%
VP: 6 mmHg | IP: 10.04 eV |  | Sp.Gr: 0.81
Fl.P: 84°F | UEL: 11.2% | LEL: 1.4% |
Class IC Flammable Liquid: Fl.P. at or above 73°F and below 100°F.
Incompatibilities & Reactivities Strong oxidizers, strong mineral acids, alkali metals, halogens
Measurement Methods NIOSH 1450; 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 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 1400 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, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, nose, throat; headache, dizziness, drowsiness; corneal inflammation, blurred vision, lacrimation (discharge of tears), photophobia (abnormal visual intolerance to light); dermatitis; possible auditory nerve damage, hearing loss; central nervous system depression
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION