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Chemical Sampling Information (CSI)
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General Description

Synonyms: Phosphorothioic acid O,O-dimethyl O-[3-methyl-4-(methylthio)phenyl] ester; Baycid; Baytex; Entex; Lebayeid; Mercaptophos; Queletox; Spotten; Talodex; Tiguvon

OSHA IMIS Code Number: F105

Chemical Abstracts Service (CAS) Registry Number: 55-38-9

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: TF9625000; 59495

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN3017 Poison, Flammable Liquid

Chemical Description and Physical Properties:

liquid, slight odor of garlic, insecticide, acaricide
vapor pressure: 3 x 10-5 mm
boiling point: 87°C at 0.01 mm

Exposure Limits

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.2 mg/m3 TWA (Skin); Appendix A4 (Not Classifiable as a Human Carcinogen)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.2 mg/m3 TWA (Skin)

Health Factors

Health Effects: LD50 (oral, rat) 215-245 mg/kg

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: 480 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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