PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pentene, 1- | 109-67-1 | 1108 |
17.00
7.01
4.08
8.00
11.00
3.08
10.00
7.11
7.10
3.02
|
|||||||||
| Formula | Synonyms | |||||||||||
| C5H10 | 1-PENTENE, 1-METHYL-3-BUTENE, 1-PENTENO (DOT SPANISH), ALPHA-N-AMYLENE, PENTÈNE-1 (DOT FRENCH), PROPYLETHYLENE | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 70.13 | L | -165.2 | 29.9 | 635 | 25 | 0.6405 @ 20°C | 15000 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 41 | 450 | 2700 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 120 | 1300 | 7700 |
Technical Basis
Limited data was available for pentene; the sole toxicity starting point was LC50 rat inhalation data, with exposure over a 4-hour period. Analysts used toxicity data, scaling the exposure time, and applying Table 3.4 and Table 3.5:
TEEL-1 = TEEL-2/11
TEEL-2 = TEEL-3/6
TEEL-3 = TEEL-3 = 7700 mg/m3, using the ten Berge equation. Basis: LC50, Rat, Inhalation, Exposure = 175,000 mg/m3/4h
Both analysts used same method, resulting in the same TEEL values. The review results in a recommendation to revise previous thresholds. TEELs were rounded to two significant figures and converted from referenced units to either ppm or mg/m3, providing both values.
Based on the source information found, the correct TEEL-3 value is 7700 mg/m3, not 7700 ppm as provided in Rev. 29A. This finding results in a significant change to the TEELs.
TEEL-1 = TEEL-2/11
TEEL-2 = TEEL-3/6
TEEL-3 = TEEL-3 = 7700 mg/m3, using the ten Berge equation. Basis: LC50, Rat, Inhalation, Exposure = 175,000 mg/m3/4h
Both analysts used same method, resulting in the same TEEL values. The review results in a recommendation to revise previous thresholds. TEELs were rounded to two significant figures and converted from referenced units to either ppm or mg/m3, providing both values.
Based on the source information found, the correct TEEL-3 value is 7700 mg/m3, not 7700 ppm as provided in Rev. 29A. This finding results in a significant change to the TEELs.
References
Temporary Emergency Exposure Limits for Chemicals: Methods and Practice (DOE-HDBK-1046-2016)
https://pubchem.ncbi.nlm.nih.gov/compound/8004#section=Toxicity
https://haz-map.com/Agents/2918
https://chem.nlm.nih.gov/chemidplus/rn/109-67-1
https://www.sigmaaldrich.com/US/en/sds/aldrich/76971