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Chemical Sampling Information (CSI)
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General Description

Synonyms: o,o-Dimethyl o-(2,4,5-trichlorophenyl)phosphorothioate; Fenchlorophos

OSHA IMIS Code Number: 2226

Chemical Abstracts Service (CAS) Registry Number: 299-84-3

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: TG0525000; 59514

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN2922 Corrosive

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

Chemical Description and Physical Properties:

white to tan waxy solid
molecular weight: 321.57
vapor pressure: 0.0008 mm at 25°C
boiling point: 97°C @ 0.01 mm
melting point: 41°C

Incompatibilities: Strong oxidizers

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 15 mg/m3

Construction Industry: 10 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 10 mg/m3 TWA; Appendix A4 (Not Classifiable as a Human Carcinogen)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 10 mg/m3 TWA

Health Factors

Potential Symptoms: In animals: cholinesterase inhibition; eye irritation; liver, kidney damage

Health Effects: Cholinesterase inhibition (HE6)

Affected Organs: Skin, liver, kidneys, blood plasma

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: OSHA Versatile Sampler (OVS-2) - 13 mm XAD-2 tube (270/140 mg sections, 20/60 mesh) with Glass Fiber filter enclosed
    analytical solvent: Toluene
    maximum volume: 60 Liters
    maximum flow rate: 1.0 L/min
    current analytical method: Gas Chromatography; GC/FPD
    method reference: 2 (OSHA In-House File)
    method classification: Partially Validated
    note: OSHA personnel may obtain sampling tubes from the Salt Lake Technical Center.

Wipe Sampling Method:

  • sampling media: Glass Fiber Filter

Bulk Method:

  • Limit the amount of bulk submitted to one gram or one mL.

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