Chlorine trifluoride

  • Chlorotrifluoride
  • Chlorine fluoride
Formula
ClF3
Structure
Description
A colorless gas or green liquid with a pungent odor.
Uses
Fluorinating agent, in nuclear reactor fuel processing, incendiary, igniter & propellant for rockets, pyrolysis inhibitor for fluorocarbon polymers.

Registry Numbers and Inventories.
CAS
7790-91-2
EC (EINECS/ELINCS)
232-230-4
RTECS
FO2800000
RTECS class
Human Data; Primary Irritant
UN (DOT)
1749
Merck
12,2150
Beilstein/Gmelin
1439 (G)
Swiss Giftliste 1
G-1429
Canada DSL/NDSL
NDSL
US TSCA
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
ClF3
Formula mass
92.44
Melting point, °C
-80
Boiling point, °C
11.8
Vapor pressure, mmHg
962.07 (17.46 C)
Vapor density (air=1)
>3
Critical temperature
154.5
Critical pressure
56.9
Density
0.004 g/cm3 (12 C)
Solubility in water
Decomposes
Viscosity
0.09182 cp (2727 C)
Surface tension
26.6 g/s2 @ 273 K
Heat of fusion
7.61 kJ/mol
Heat of vaporization
27.5 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated location. Keep cylinders restrained. Separate from water, organic matter, glass, asbestos, sand, chlorofluorocarbons, acids, alkalies, halogens, slats, metal oxides. Outside or detached storage is preferred.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep material out of water sources and sewers. Do not use water on material itself. Use water spray to knock-down vapors. Neutralize spilled material with crushed limestone, soda ash, or lime.
Stability
Stability:unstable in moist air.
Incompatibilities
Incompatible with fuels, nitro compounds Interaction with water is violent and may be explosive, even with ice.

Fire.
Fire fighting
Do not use water on material itself. Use dry chemical or carbon dioxide. Cool all affected containers with flooding quantities of water. If large quantities of combustibles are involved, use water in flooding quantities as spray and fog. Use water spray to knock-down vapors.
Fire potential
Spontaneously combusts on contact with organic or silicacious matter.
Hazards
Vapors from liquefied gas are initially heavier than air and spread along ground. Containers may explode when heated.
Combustion products
If released from container, fumes are toxic and irritating.
Health
4
 
Flammability
0
 
 
Reactivity
3
 
 
Special
OW

Health.
Exposure limit(s)
TLV: 0.1 ppm; 0.38 mg/m3 (as CEILING) (ACGIH 1997). OSHA PEL: C 0.1 ppm (0.4 mg/m3) NIOSH REL: C 0.1 ppm (0.4 mg/m3) NIOSH IDLH: 20 ppm
Poison_Class
1
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Inhalation
Dyspnea, bronchospasm (with abnormal pfts and hypoxia), chemical pneumonitis, pulmonary edema (can be hemorrhagic), tracheobronchitis, upper airway obstruction, chemical burns (larynx, trachea, bronchi) and ards may occur following inhalation.
   Skin
May be fatal if absorbed through the skin. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
   Eyes
Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Effects may be delayed.
   Skin
Remove all exposed clothing and jewelry taking necessary precautions to prevent secondary exposure to health care providers. Irrigate exposed areas promptly with copious amounts of water for at least 30 minutes. Wash the skin, including hair and nails, vigorously; do repeated soap washings. Discard contaminated clothing.
   Eyes
Immediately flush with running water for at least 20 minutes. Effects may be delayed.

Transport.
UN number
1749
Response guide
Hazard class
2.3
PRTC
T
USCG CHRIS Code
CTF
 
Std. Transport #
4920352