PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tri-o-tolyl phosphate; (Triorthocresyl phosphate) | 78-30-8 | 2574 |
6.00
4.01
4.05
7.01
7.00
4.09
4.06
4.10
11.00
4.07
|
|||||||||
| Formula | Synonyms | |||||||||||
| C21H21O4P | TRICRESYL PHOSPHATE, CELLUFLEX 179C, CRESYL PHOSPHATE, DISFLAMOLL TKP, DURAD 124, DURAD 125, FOSFATO DE TRICRESILO (DOT SPANISH), FYRQUEL 150, IMOL S 140, KRONITEX, KRONITEX R, KRONITEX TCP, LINDOL, NISSAN UNFLAME TCP, O-CRESYL PHOSPHATE, O-CRESYLPHOSPHATE, O-TOLYL PHOSPHATE, O-TOLYLPHOSPHATE PHOSPHORIC ACID, PHOSFLEX 179-C, PHOSFLEX 179C, PHOSPHATE DE TRICRÉSYLE (DOT FRENCH), PHOSPHLEX 179A, PHOSPHORIC ACID TRICRESYL ESTER, PHOSPHORIC ACID, TRI-O-CRESYL ETHER, PHOSPHORIC ACID, TRI-O-TOLYL ESTER, PHOSPHORIC ACID, TRIS(2-METHYLPHENYL) ESTER, PHOSPHORIC ACID, TRITOLYL ESTER, REOMOL TCP, SANSOCIZER TCP, SUMIGUARD TBT, SYN-O-AD 8484, TCP, TOCP, TOFK, TOKF, TOTP, TRI-2-METHYLPHENYL PHOSPHATE, TRI-2-TOLYL PHOSPHATE, TRI-O-CRESYL ESTER, TRI-O-CRESYL ESTER OF PHOSPHORIC ACID, TRI-O-CRESYL PHOSPHATE, TRI-O-TOLYL ESTER PHOSPHORIC ACID, TRI-O-TOLYL PHOSPHATE, TRI-P-CRESYL PHOSPHATE, TRI-P-TOLYL PHOSPHATE, TRICRESOL PHOSPHATE, TRICRESYL ORTHOPHOSPHATE, TRICRESYL PHOSPHATE (<1% ORTHO ISOMER), TRICRESYL PHOSPHATE (>= 1% ORTHO ISOMER), TRIS(METHYLPHENYL) PHOSPHATE, TRIS(O-CRESYL) PHOSPHATE, TRIS(O-METHYLPHENYL) PHOSPHATE, TRIS(O-TOLYL) PHOSPHATE, TRIS(TOLYLOXY)PHOSPHINE OXIDE, TRITOLYL PHOSPHATE | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 368.39 | L | 410 | 1.17 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.008 | 0.44 | 2.7 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.12 | 6.6 | 41 |
Technical Basis
A review of available sources identified exposure limits and animal toxicity data (LDLo, LD50). 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, and 3.4. The IDLH was selected as the TEEL-3. The IDLH 1990 basis was revised in 1994 to include acute oral toxicity human and animal data; however, there was no change in the original and revised IDLH value. The TEEL-2 value was derived according to Table 3.5. The German OEL-STEL (AGS, DFG; inhalable fraction and vapor) was selected as the TEEL-1.
• TEEL-1 = OEL-STEL (0.12 mg/m3; inhalable fraction and vapor-Germany)
• TEEL-2 = TEEL-3/6
• TEEL-3 = IDLH (1990/1994, 40 mg/m3)
This review generated TEEL values inconsistent with Rev. 29A. The Rev. 29A TEEL-3 basis was also the 1990/1994 IDLH; however, the IDLH value was reported in units of ppm, instead of the published units of mg/m3. The current TEEL-3 is also the 1990/1994 IDLH, reported with the correct units: 40 mg/m3. The Rev. 29A and current TEEL-2 were derived using the same methodology, with differences due to the change in TEEL-3. The Rev. 29A TEEL-1 basis was a TLV-TWA, while the current TEEL-1 is a more preferred source (STEL > TWA, Table 3.1).
• TEEL-1 = OEL-STEL (0.12 mg/m3; inhalable fraction and vapor-Germany)
• TEEL-2 = TEEL-3/6
• TEEL-3 = IDLH (1990/1994, 40 mg/m3)
This review generated TEEL values inconsistent with Rev. 29A. The Rev. 29A TEEL-3 basis was also the 1990/1994 IDLH; however, the IDLH value was reported in units of ppm, instead of the published units of mg/m3. The current TEEL-3 is also the 1990/1994 IDLH, reported with the correct units: 40 mg/m3. The Rev. 29A and current TEEL-2 were derived using the same methodology, with differences due to the change in TEEL-3. The Rev. 29A TEEL-1 basis was a TLV-TWA, while the current TEEL-1 is a more preferred source (STEL > TWA, Table 3.1).
References
OEL-STEL: https://ilv.ifa.dguv.de/limitvalues/62925
TLV-TWA: https://www.osha.gov/chemicaldata/671
IDLH: https://www.cdc.gov/niosh/idlh/78308.html