PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tributyl phosphate | 126-73-8 |
6.00
14.01
4.01
11.01
14.02
4.05
7.01
8.00
7.00
11.00
|
||||||||||
| Formula | Synonyms | |||||||||||
| C12H27O4P | TRIBUTYL PHOSPHATE, BUTYL PHOSPHATE, BUTYL PHOSPHATE ((BUO)3PO), BUTYL PHOSPHATE, TRI-, CELLUPHOS 4, DISFLAMOLL TB, PHOSPHORIC ACID, TRI-BUTYL ESTER, PHOSPHORIC ACID, TRIBUTYL ESTER, TBP, TBPA, TRI-N-BUTYL PHOSPHATE, TRIBUTOXYPHOSPHINE OXIDE, TRIBUTYL ESTER OF PHOSPHORIC ACID | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 266.31 | L | -80 | 289 | 75 | 205 | 0.9727 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 1.4 | 21 | 125 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 15 | 230 | 1400 |
Technical Basis
A review of available sources identified the following: a TLV-TWA (inhalable fraction and vapor), an IDLH (1994 &1990), and acute animal toxicity data (LC50; mouse, rat). Data sources were selected according to the hierarchy listed in Table 3.1. Toxicity data were selected according to type of exposure, species, and route according to the hierarchies stated in Sections 3.3.1, 3.3.2, and evaluated using factors in Tables 3.2, 3.3, 3.4 and Section 3.3.4. The 1990 IDLH was selected as the TEEL-3 due to its basis on human exposure and TEEL development priority (Table 3.1). The TEEL-2 value was derived according to Table 3.5. The TLV-TWA was selected as the TEEL-1 basis.
• TEEL-1 = TLV-TWA (5 mg/m3) x 3
• TEEL-2 = TEEL-3/6
• TEEL-3 = IDLH (1990) (125 ppm)
This review generated TEEL-3 and TEEL-1 values that are consistent with Rev. 29A. In Rev. 29A the TEEL-2 basis was a rat oral TDLo, however that data was not found during the current review.
• TEEL-1 = TLV-TWA (5 mg/m3) x 3
• TEEL-2 = TEEL-3/6
• TEEL-3 = IDLH (1990) (125 ppm)
This review generated TEEL-3 and TEEL-1 values that are consistent with Rev. 29A. In Rev. 29A the TEEL-2 basis was a rat oral TDLo, however that data was not found during the current review.
References
https://cameochemicals.noaa.gov/chemical/12842
TLV-TWA: American Conference of Governmental Industrial Hygienists. Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices. ACGIH, Cincinnati, OH 2014, p. 58. Retrieved from https://pubchem.ncbi.nlm.nih.gov/source/hsdb/1678
IDLH (1990): https://www.cdc.gov/niosh/idlh/126738.html
Numerous animal toxicity: National Center for Biotechnology Information (2024). PubChem Compound Summary for CID 31357, Tributyl phosphate. Retrieved from https://pubchem.ncbi.nlm.nih.gov/compound/Tributyl-phosphate.