# NIOSH Pocket Guide to Chemical Hazards
n-Butyl acetate | CAS 123-86-4
CH3COO[CH2]3CH3 | RTECS AF7350000
Synonyms & Trade Names Butyl acetate, n-Butyl ester of acetic acid, Butyl ethanoate | DOT ID & Guide 1123 129
Exposure Limits | NIOSH REL: TWA 150 ppm (710 mg/m3) ST 200 ppm (950 mg/m3)
OSHA PEL†: TWA 150 ppm (710 mg/m3)
IDLH 1700 ppm [10%LEL] | Conversion 1 ppm = 4.75 mg/m3
Physical Description Colorless liquid with a fruity odor.
MW: 116.2 | BP: 258°F | FRZ: -107°F | Sol: 1%
VP: 10 mmHg | IP: 10.00 eV |  | Sp.Gr: 0.88
Fl.P: 72°F | UEL: 7.6% | LEL: 1.7% |
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities Nitrates; strong oxidizers, alkalis & acids
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/OSHA Up to 1500 ppm: (APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s)*/(APF = 10) Any supplied-air respirator* Up to 1700 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)*/(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 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, upper respiratory system; headache, drowsiness, narcosis
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION