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Chemical Sampling Information (CSI)
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General Description

Synonyms: (1)RTECS 85-86

OSHA IMIS Code Number: T104

Chemical Abstracts Service (CAS) Registry Number: 7719-09-7

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: XM5150000; 82325

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1836 137

NIOSH Pocket Guide to Chemical Hazards, Thionyl Chloride: chemical description, physical properties, potentially hazardous incompatibilities, and more

Chemical Description and Physical Properties:

pale yellow to red liquid with suffocating odor; FP -105 C; BP 79 C; decomposes at 140 C, decomposes (fumes) in water, soluble in benzene, carbon tetrachloride
molecular weight: 118.96
molecular formula: SOCl2
Exposure Limits

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 1 ppm, 4.9 mg/m3 Ceiling

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 1 ppm Ceiling

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Midget Fritted Glass Bubbler (MFGB) containing 10 mL Deionized Water
    minimum time: 15 Minutes
    maximum flow rate: 1.0 L/min (Ceiling)
    current analytical method: Ion Chromatography; IC
    method reference: 2 (OSHA In-house file)
    method classification: Not Validated
    note: The analyte is hydrolyzed by water to SO2 and HCl. Proposed sampling and analytical procedure follows OSHA ID-174SG for total Cl- which is reported as the compound.

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