# NIOSH Pocket Guide to Chemical Hazards
Isobutyl acetate | CAS 110-19-0
CH3COOCH2CH(CH3)2 | RTECS AI4025000
Synonyms & Trade Names Isobutyl ester of acetic acid, 2-Methylpropyl acetate, 2-Methylpropyl ester of acetic acid, beta-Methylpropyl ethanoate | DOT ID & Guide 1213 129
Exposure Limits | NIOSH REL: TWA 150 ppm (700 mg/m3)
OSHA PEL: TWA 150 ppm (700 mg/m3)
IDLH 1300 ppm [10%LEL] | Conversion 1 ppm = 4.75 mg/m3
Physical Description Colorless liquid with a fruity, floral odor.
MW: 116.2 | BP: 243°F | FRZ: -145°F | Sol(77°F): 0.6%
VP: 13 mmHg | IP: 9.97 eV |  | Sp.Gr: 0.87
Fl.P: 64°F | UEL: 10.5% | LEL: 1.3% |
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 1300 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode£/(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 = 25) Any powered, air-purifying respirator with 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, upper respiratory system; headache, drowsiness, anesthesia; in animals: narcosis
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION