September 2010
NIOSH Publication Number 2010-168c

Thionyl chloride

Synonyms & Trade Names
Sulfinyl chloride, Sulfur chloride oxide, Sulfurous dichloride, Sulfurous oxychloride, Thionyl dichloride
CAS No.
7719-09-7
RTECS No.
XM5150000
DOT ID & Guide
1836 137
Formula
SOCl2
Conversion
1 ppm = 4.87 mg/m3
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
: C 1 ppm (5 mg/m3)
OSHA PEL
†: none
Measurement Methods

None available
Physical Description
Colorless to yellow to reddish liquid with a pungent odor like sulfur dioxide. [Note: Fumes form when exposed to moist air.]
MW:
119.0
BP:
169°F
FRZ:
-156°F
Sol:
Reacts		 VP(70°F): 100 mmHg
IP:
?
Sp.Gr:
1.64
Fl.P:
NA
UEL:
NA
LEL:
NA
Noncombustible Liquid
Incompatibilities & Reactivities
Water, acids, alkalis, ammonia, chloryl perchlorate [Note: Reacts violently with water to form sulfur dioxide & hydrogen chloride.]
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, mucous membrane; eye, skin burns
Target Organs
Eyes, skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: No recommendation
Provide: Eyewash, Quick drench
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 1409