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Chemical Sampling Information (CSI)
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General Description

Synonyms: Thimet; o,o-Diethyl s-[(ethylthio) methyl] phosphorodithioate

OSHA IMIS Code Number: 2064

Chemical Abstracts Service (CAS) Registry Number: 298-02-2

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: TD9450000; 59116

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 3018 152

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

Chemical Description and Physical Properties:

liquid
vapor pressure: 8.4 X 10-4 mm
boiling point: 125-127°C at 2.0 mm

Exposure Limits

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.05 mg/m3 TWA; 0.2 mg/m3 STEL (Skin)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.05 mg/m3 TWA, 0.2 mg/m3 STEL (Skin)

Health Factors

Health Effects: Cholinesterase inhibition (HE6); LD50 (oral, rat) 1.1-2.3 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
    maximum volume: 480 Liters
    maximum flow rate: 1.0 L/min (TWA)
    maximum volume: 15 Liters
    maximum flow rate: 1.0 L/min (STEL)
    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.

Conditions: Toluene extraction; OV 17; Oven T 150 deg. C; Inj. T 250 deg. C; Det. T 200 deg. C; C/P KM

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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