NIOSH Pocket Guide to Chemical Hazards

Trichloroacetic acid

CAS 76-03-9


RTECS AJ7875000
Synonyms & Trade Names
TCA, Trichloroethanoic acid
DOT ID & Guide
1839 153 (solid)
2564 153 (solution)


NIOSH REL: TWA 1 ppm (7 mg/m3)
OSHA PEL†: none
IDLH N.D. See: IDLH INDEX Conversion 1 ppm = 6.68 mg/m3
Physical Description
Colorless to white, crystalline solid with a sharp, pungent odor.
MW: 163.4
BP: 388°F
MLT: 136°F
Sol: Miscible
VP(124°F): 1 mmHg
IP: ?

Sp.Gr: 1.62
Fl.P: NA

Noncombustible Solid
Incompatibilities & Reactivities
Moisture, iron, zinc, aluminum, strong oxidizers [Note: Decomposes on heating to form phosgene & hydrogen chloride. Corrosive to metals.]
Measurement Methods
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Important additional information about respirator selection
Respirator Recommendations Not available.
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, nose, throat, respiratory system; cough, dyspnea (breathing difficulty), delayed pulmonary edema; eye, skin burns; dermatitis; salivation, vomiting, diarrhea
Target Organs Eyes, skin, respiratory system, gastrointestinal tract
See also: INTRODUCTION   See ICSC CARD: 0586