# NIOSH Pocket Guide to Chemical Hazards
Chlorine trifluoride | CAS 7790-91-2
ClF3 | RTECS FO2800000
Synonyms & Trade Names Chlorine fluoride, Chlorotrifluoride | DOT ID & Guide 1749 124
Exposure Limits | NIOSH REL: C 0.1 ppm (0.4 mg/m3)
OSHA PEL: C 0.1 ppm (0.4 mg/m3)
IDLH 20 ppm | Conversion 1 ppm = 3.78 mg/m3
Physical Description Colorless gas or a greenish-yellow liquid (below 53°F) with a somewhat sweet, suffocating odor. [Note: Shipped as a liquefied compressed gas.]
MW: 92.5 | BP: 53°F | FRZ: -105°F | Sol: Reacts
VP: 1.4 atm | IP: 13.00 eV | RGasD: 3.21 | Sp.Gr: 1.77 (Liquid at 53°F)
Fl.P: NA | UEL: NA | LEL: NA |
Nonflammable Gas Noncombustible Liquid, but contact with organic materials may result in SPONTANEOUS ignition.
Incompatibilities & Reactivities Oxidizers, water, acids, combustible materials, sand, glass, metals (corrosive) [Note: Reacts with water to form chlorine & hydrofluoric acid.]
Measurement Methods None available
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated (liquid) Remove: When wet or contaminated (liquid) Change: No recommendation Provide: Eyewash (liquid), Quick drench (liquid) | First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately (liquid)
Respirator Recommendations NIOSH/OSHA Up to 2.5 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode£ Up to 5 ppm: (APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Up to 20 ppm: (APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode 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 canister providing protection against the compound of concern/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, ingestion (liquid), skin and/or eye contact
Symptoms Eye, skin burns (liquid or high vapor concentration); respiratory irritation; in animals: lacrimation (discharge of tears), corneal ulcer; pulmonary edema
Target Organs Skin, eyes, respiratory system
See also: INTRODUCTION