THIONYL CHLORIDE

Chemical Identification
CAS # 7719-09-7
Formula

Cl₂OS

Synonyms

sulfinyl chloride; sulfur chloride oxide; sulfurous dichloride; sulfurous oxychloride; thionyl dichloride

Physical Properties
Physical description Colorless to yellow to reddish liquid with a pungent odor like sulfur dioxide.
Boiling point 169°F Molecular weight 119.0
Freezing point/melting point -156°F Vapor pressure 100 mmHg at 70°F
Flash point Vapor density
Specific gravity 1.64 Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating 4 NFPA fire rating 0
NFPA reactivity rating 2 NFPA special instruction W: Reacts violently or explosively with water.
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Analyte code (IMIS no.)
Sampling group
Sampler/Sampling media
Sampling time*
Sampling volume (TWA)*
Sampling flow rate (TWA)*
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments
Method reference
Notes
Special requirements

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Sampler/Sampling media
Bulk Method
Bulk Method
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA REL-TWA TLV-TWA PEL-TWA
PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C

1 ppm (5 mg/m³)

TLV-C

0.2 ppm [2009]

PEL-C

1 ppm (5 mg/m³)

Skin notation

NA

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

Not established

Notes: Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: Not listed Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

0.2 ppm/2 ppm/10 ppm

Last Updated Date : 01/13/2021