NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

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 See: 7790912
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
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
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
Important additional information about respirator selection
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   See ICSC CARD: 0656   See MEDICAL TESTS: 0046