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Chemical Sampling Information (CSI)
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General Description

Synonyms: o-Tritolyl phosphate; TCP; TOCP; Tri-ortho-cresyl Phosphate

OSHA IMIS Code Number: 2532

Chemical Abstracts Service (CAS) Registry Number: 78-30-8

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: TD0350000; 58946

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 2574 151

Chemical Description and Physical Properties:

    Colorless, odorless liquid.

    molecular weight: 368
    melting point: -27ºF
    vapor pressure: Very low
    boiling point: Decomposes

Incompatibilities: None hazardous

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

    General Industry: 0.1 mg/m3

    Construction Industry: 0.1 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.1 mg/m3 TWA (Skin); Appendix A4 (Not Classifiable as a Human Carcinogen)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.1 mg/m3 TWA (Skin)

Health Factors

Potential Symptoms: GI disturbances; peripheral neuropathy; cramps in calves; paresthesia in feet or hands; weakness in feet, wrist drop, paralysis

Health Effects: Polyneuropathy (HE7)

Affected Organs: PNS, CNS

Monitoring Methods used by OSHA

Laboratory Sampling/Analytical Method:

  • sampling media: Mixed Cellulose Ester Filter (MCEF) 0.8 microns
    maximum volume: 120 Liters
    maximum flow rate: 1.0 L/min
    method reference: 1,2 (OSHA Modified NIOSH S-209)
    sampling and analytical error: 0.14
    method classification: Partially Validated

Bulk Method:

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

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