# NIOSH Pocket Guide to Chemical Hazards
Sulfur tetrafluoride | CAS 7783-60-0
SF4 | RTECS WT4800000
Synonyms & Trade Names Tetrafluorosulfurane | DOT ID & Guide 2418 125
Exposure Limits | NIOSH REL: C 0.1 ppm (0.4 mg/m3)
OSHA PEL†: none
IDLH N.D. | Conversion 1 ppm = 4.42 mg/m3
Physical Description Colorless gas with an odor like sulfur dioxide. [Note: Shipped as a liquefied compressed gas.]
MW: 108.1 | BP: -41°F | FRZ: -185°F | Sol: Reacts
VP(70°F): 10.5 atm | IP: 12.63 eV | RGasD: 3.78 |
Fl.P: NA | UEL: NA | LEL: NA |
Nonflammable Gas
Incompatibilities & Reactivities Moisture, concentrated sulfuric acid, dioxygen difluoride [Note: Readily hydrolyzed by moisture, forming hydrofluoric acid & thionyl fluoride.]
Measurement Methods OSHA ID110
Personal Protection & Sanitation Skin: Frostbite Eyes: Frostbite Wash skin: No recommendation Remove: No recommendation Change: No recommendation Provide: Frostbite | First Aid (See procedures) Eye: Frostbite Skin: Frostbite Breathing: Respiratory support
Respirator Recommendations To be added later
Exposure Routes inhalation, skin and/or eye contact
Symptoms Irritation eyes, skin, mucous membrane; eye, skin burns (from SF4 releasing hydrofluoric acid on exposure to moisture); liquid: frostbite; in animals: dyspnea (breathing difficulty), lassitude (weakness, exhaustion), rhinorrhea (discharge of thin mucus)
Target Organs Eyes, skin, respiratory system
See also: INTRODUCTION