# NIOSH Pocket Guide to Chemical Hazards
Trichloroacetic acid | CAS 76-03-9
CCl3COOH | RTECS AJ7875000
Synonyms & Trade Names TCA, Trichloroethanoic acid | DOT ID & Guide 1839 153 (solid) 2564 153 (solution)
Exposure Limits | NIOSH REL: TWA 1 ppm (7 mg/m3)
OSHA PEL†: none
IDLH N.D. | 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 | UEL: NA | LEL: 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 OSHA PV2017
Personal Protection & Sanitation 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
Respirator Recommendations To be added later
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