PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Trimethylbenzene, 1,2,3- | 526-73-8 |
15.01
11.01
7.01
11.00
4.06
7.11
3.09
3.10
16.02
|
||||||||||
| Formula | Synonyms | |||||||||||
| C9H12 | ||||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 120.19 | L | -25.4 | 176.12 | 0.75 | 15 | 0.8944 @ 20°C | 8000 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 140 | 360 | 470 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 690 | 1800 | 2300 |
Technical Basis
A review of available sources identified AEGLs (AEGL-2 and AEGL-1) and limited acute toxicity data for this chemical. 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 rat oral LDLo was selected as the TEEL-3 basis; the dose is reported in units of mL/kg; therefore, the reported density (0.894 g/m3 at 25°C) was used to convert the dose to mg/kg. The AEGLs were selected as the TEEL-2 and TEEL-1 due to their priority among the emergency exposure limits (Section 1).
• TEEL-1 = AEGL-1
• TEEL-2 = AEGL-2
• TEEL-3 = Rat oral LDLo (10 mL/kg converted to 8940 mg/kg with density = 0.894 g/m3)
This review generated TEEL-2 and TEEL-1 values consistent with Rev. 29A. The Rev. 29A and current TEEL-3 values reported in mg/m3 are consistent; differences in the values reported in ppm may be due to rounding.
• TEEL-1 = AEGL-1
• TEEL-2 = AEGL-2
• TEEL-3 = Rat oral LDLo (10 mL/kg converted to 8940 mg/kg with density = 0.894 g/m3)
This review generated TEEL-2 and TEEL-1 values consistent with Rev. 29A. The Rev. 29A and current TEEL-3 values reported in mg/m3 are consistent; differences in the values reported in ppm may be due to rounding.
References
AEGLs (Table 8-1) and chemical information (Table 8-2) retrieved from: https://www.epa.gov/aegl/123-trimethylbenzene-results-aegl-results
Density retrieved from: https://www.sigmaaldrich.com/US/en/sds/aldrich/t73202?userType=anonymous
Rat oral LDLo. AMIHAB 19,403,1959. See Section 12.1.3, retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Trimethylbenzene