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Sulfur hexafluoride

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Synonyms & Trade Names
Sulfur fluoride [Note: May contain highly toxic sulfur pentafluoride as an impurity.]
CAS No.
2551-62-4
RTECS No.
WS4900000
DOT ID & Guide
1080 126
Formula
SF₆
Conversion
1 ppm = 5.98 mg/m3
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
TWA 1000 ppm (6000 mg/m3)
OSHA PEL
TWA 1000 ppm (6000 mg/m3)
Measurement Methods
NIOSH 6602
See: NMAM or OSHA Methods
Physical Description
Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Condenses directly to a solid upon cooling.]
Molecular Weight
146.1
Boiling Point
Sublimes
Freezing Point
-83°F (Sublimes)
Solubility
(77°F): 0.003%
Vapor Pressure
21.5 atm
Ionization Potential
19.30 eV
Flash Point
NA
Upper Explosive Limit
NA
Lower Explosive Limit
NA
Relative Gas Density
5.11
Nonflammable Gas
Incompatibilities & Reactivities
Disilane
Exposure Routes
inhalation
Symptoms
asphyxia: increased breath rate, pulse rate; slight muscle incoordination, emotional upset; lassitude (weakness, exhaustion), nausea, vomiting, convulsions; liquid: frostbite
Target Organs
respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin:Frostbite
Eyes:Frostbite
Wash skin:No recommendation
Remove:No recommendation
Change:No recommendation
Provide:Frostbite wash
First Aid
(See procedures)
Eye:Frostbite
Skin:Frostbite
Breathing:Respiratory support
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0571
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health