PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Methyl-2-butene, 2-; (Amylene) | 513-35-9 | 1108 |
11.01
15.01
15.02
|
|||||||||
| Formula | Synonyms | |||||||||||
| C5.H10 | N-AMYLENE, 1,1,2-TRIMETHYLETHYLENE, 2-METHYL-2-BUTENE, 3-METHYL-2-BUTENE, AMYLENE, BETA-ISOAMYLENE, N-AMILENO (DOT SPANISH), N-AMYLÈNE (DOT FRENCH), TRIMETHYLETHENE, TRIMETHYLETHYLENE | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 70.133 | L | 38.56 | 468 | 25 | 0.6623 @ 20°C |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 3.0 | 33 | 200 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 1.0 | 12 | 70 |
Technical Basis
A review of limited sources identified a rat oral LD50. Reported GHS health hazard ratings (H315, Category 2; H336, Category 3; H302, Category 4) indicate a mid-level health hazard, approximately equivalent to an HHR=2. 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. Analysts selected the rat oral LD50 as the TEEL-3 basis; the dose is reported as a range (1000-1700 mg/kg) so analysts used the lower limit of the range for calculations. TEEL-2 and TEEL-1 values were derived according to Table 3.5.
• PAC-1 = TEEL-1 = TEEL-2/11
• PAC-2 = TEEL-2 = TEEL-3/6
• PAC-3 = TEEL-3 = Rat oral LD50 (1000 mg/kg)
This review generated PAC values that are inconsistent with Rev. 29A. The Rev. 29A TEEL-3 basis was an HHR=2 while the current TEEL-3 basis acute toxicity data (LD50). The Rev. 29A and current TEEL-2 and TEEL-1 use the same methodology, with differences due to the change in TEEL-3.
• PAC-1 = TEEL-1 = TEEL-2/11
• PAC-2 = TEEL-2 = TEEL-3/6
• PAC-3 = TEEL-3 = Rat oral LD50 (1000 mg/kg)
This review generated PAC values that are inconsistent with Rev. 29A. The Rev. 29A TEEL-3 basis was an HHR=2 while the current TEEL-3 basis acute toxicity data (LD50). The Rev. 29A and current TEEL-2 and TEEL-1 use the same methodology, with differences due to the change in TEEL-3.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/10553
Rat oral LD50 (1000-1700 mg/kg). Retrieved from: https://chem.echa.europa.eu/100.007.416/dossier-view/26937e27-366f-46da-9e04-99a8fbd6934a/IUC5-dba18f41-14ea-4902-b93e-ea988f1260bc_a2bd41e2-fae8-457d-b68e-ba0720f0fbf0?searchText=513-35-9