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Chemical Sampling Information (CSI)
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General Description

Synonyms: (1)RTECS 85-86

OSHA IMIS Code Number: D177

Chemical Abstracts Service (CAS) Registry Number: 542-75-6

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: UC8310000; 67155

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN2047 Flammable Liquid

Chemical Description and Physical Properties:

cis & trans isomeric forms, both colorless liquids
molecular weight: 110.97
molecular formula: C3H4Cl2
flash point: 35°C; + In in water; soluble in acetone, toluene, octane

Exposure Limits

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 1 ppm, 4.5 mg/m3 TWA (Skin); Appendix A4 (Not Classifiable as a Human Carcinogen)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 1 ppm TWA; Potential carcinogen

Health Factors

Carcinogenic Classification:

International Agency for Research on Cancer (IARC): Group 2B, possibly carcinogenic to humans (technical grade)

National Toxicology Program (NTP): Suspect Human Carcinogen
Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Charcoal Tube (100/50 mg sections, 20/40 mesh)
    analytical solvent: Carbon Disulfide
    maximum volume: 5 Liters
    maximum flow rate: 0.2 L/min
    current analytical method: Gas Chromatography; GC/FID
    method reference: 1, 2 (OSHA modified NIOSH 1003 [113 KB PDF, 7 pages])
    method classification: Not Validated

Wipe Sampling Method:

  • sampling media: Wipe with charcoal pad, seal in glass vial for shipment.

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