# NIOSH Pocket Guide to Chemical Hazards
n-Butyl lactate | CAS 138-22-7
CH3CH(OH)COOC4H9 | RTECS OD4025000
Synonyms & Trade Names Butyl ester of 2-hydroxypropanoic acid, Butyl ester of lactic acid, Butyl lactate | DOT ID & Guide 1993 128 (combustible liquid, n.o.s.)
Exposure Limits | NIOSH REL: TWA 5 ppm (25 mg/m3)
OSHA PEL†: none
IDLH N.D. | Conversion 1 ppm = 5.98 mg/m3
Physical Description Clear, colorless to white liquid with a mild, transient odor.
MW: 146.2 | BP: 370°F | FRZ: -45°F | Sol: Slight
VP: 0.4 mmHg | IP: ? |  | Sp.Gr: 0.98
Fl.P: 160°F | UEL: ? | LEL: 1.15% |
Class IIIA Combustible Liquid: Fl.P. at or above 140°F and below 200°F.
Incompatibilities & Reactivities Strong acids & bases, strong oxidizers, heat, sparks, open flames
Measurement Methods None available
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: No recommendation Provide: Eyewash, Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, nose, throat; drowsiness, headache, central nervous system depression; nausea, vomiting
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION