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Chemical Sampling Information (CSI)
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General Description

Synonyms: tri-n- Butyl phosphate; TBP

OSHA IMIS Code Number: 2477

Chemical Abstracts Service (CAS) Registry Number: 126-73-8

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: TC7700000; 58930

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

Chemical Description and Physical Properties:
colorless to pale yellow, odorless liquid
molecular weight: 266
boiling point: 560°F
vapor pressure: Very low
melting point: -112°F
Incompatibilities: None hazardous

Exposure Limits

OSHA Permissible Exposure Limit (PEL):
General Industry: 5.0 mg/m3

Construction Industry: 5 mg/m3 TWA
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.2 ppm, 2.2 mg/m3 TWA


Health Factors

Potential Symptoms: Eye, respiratory, skin irritation; headache; nausea

Health Effects: Irritation-Eye, Nose, Throat, Skin---Moderate (HE15) Headache (HE7)

Affected Organs: Respiratory system, skin, eyes

Monitoring Methods used by OSHA

Laboratory Sampling/Analytical Method:
  • sampling media: Mixed Cellulose Ester Filter (MCEF) 0.8 microns
    maximum volume: 100 Liters
    maximum flow rate: 1.5 L/min
    current analytical method: Gas Chromatography; GC/FPD
    method reference: 1,2 (OSHA modified NIOSH S-208)
    sampling and analytical error: 0.13
    method classification: Partially Validated
    note: If ambient temperature above 23 C, use two filter cassettes in series. After sampling separate cassettes.
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Page last updated: 08/24/1992