PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Methylnaphthalene, 2- | 91-57-6 |
15.01
4.01
11.01
15.02
4.08
4.05
7.01
11.00
4.10
4.07
|
||||||||||
| Formula | Synonyms | |||||||||||
| C11H10 | 2-METHYLNAPHTHALENE, BETA-METHYLNAPHTHALENE | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 142.2 | S | 34.6 | 241.1 | 0.75 | 57 | 1.0058 @ 20°C |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 8.7 | 54 | 320 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 1.5 | 9.3 | 55 |
Technical Basis
A review of available sources identified a TLV-TWA and rat oral LD50 acute toxicity data. Data sources were selected according to the hierarchy listed in Table 3.1. The rat oral LD50 was selected as the TEEL-3 basis and evaluated using factors in Tables 3.2, 3.3, and 3.4. The TEEL-2 was derived according to Table 3.5. The TLV-TWA was selected as the TEEL-1 basis.
• TEEL-1 = TLV-TWA (0.5 ppm) x 3
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat oral LD50 (1630 mg/kg)
This review generated TEEL values that were consistent with those found in Rev. 29A. The difference between the current and Rev. 29A TEEL-1 values may be due to rounding, as they report the same basis (TLV-TWA).
• TEEL-1 = TLV-TWA (0.5 ppm) x 3
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat oral LD50 (1630 mg/kg)
This review generated TEEL values that were consistent with those found in Rev. 29A. The difference between the current and Rev. 29A TEEL-1 values may be due to rounding, as they report the same basis (TLV-TWA).
References
TLV-TWA: https://www.osha.gov/chemicaldata/540
Rat oral LD50:Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure, Izmerov, N.F., et al., Moscow, Centre of International Projects, GKNT, 1982, (85), 1982. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/2-Methylnaphthalene