PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hexafluorobutyne-2; (1,1,1,4,4,4-Hexafluoro-2-butyne) | 692-50-2 |
11.00
4.01
17.00
|
||||||||||
| Formula | Synonyms | |||||||||||
| C4.F6 | ||||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 162.04 | G | -117.4 | -24.6 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.054 | 0.60 | 3.6 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.36 | 4.0 | 24 |
Technical Basis
A review of available sources identified acute toxicity data (LC50, LCLo). 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. Inhalation exposures were scaled to 60-minute equivalents using the ten Berge equation (Section 3.3.4). The most preferred species and route, a rat LC50, was selected as the TEEL-3 basis. TEEL-2 and TEEL-1 values were derived according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat LC50 (81 ppm/4H)
This review generated TEEL values that are consistent with Rev. 29A*.
• TEEL-1 = TEEL-2/11
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat LC50 (81 ppm/4H)
This review generated TEEL values that are consistent with Rev. 29A*.
References
National Technical Information Service., OTS0571518. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Hexafluoro-2-butyne