PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dichloro-2-butene, 1,4- | 764-41-0 | 2920 |
14.01
4.01
11.01
14.02
7.01
11.00
4.06
4.10
2.00
3.05
|
|||||||||
| Formula | Synonyms | |||||||||||
| C4H6Cl2 | 1,4-DICHLORO-2-BUTENE, 1,4-DICHLORO-2-BUTYLENE, 2-BUTENE, 1,4-DICHLORO-, 2-BUTYLENE DICHLORIDE, CIS-1,4-DICHLORO-2-BUTENE, DICHLOROBUTENE, DICHLOROBUTÈNE (DOT FRENCH), DICLOROBUTENO (DOT SPANISH), TRANS-1,4-DICHLORO-2-BUTENE | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 125 | L | 3.5 | 158 | 3 | 25 | 1.185 No temp |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.015 | 0.63 | 3.8 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.077 | 3.2 | 19 |
Technical Basis
A review of available sources identified two rat LC50 toxicity data. 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 based on 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).
• TEEL-1 = TLV-TWA (0.005 ppm) x 3
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat 4-hr LC50 (86 ppm)
This review generated TEEL-2 and TEEL-3 values that are more conservative than Rev. 29A. The prior TEEL-3 basis was also a rat 4-hr LC50 exposure (1350 mg/m3), which is less conservative than the currently recommended basis, but it was from a safety data sheet that could not be independently verified and was therefore determined to be a less reliable source than the current source (Section 3.3.1). The TEEL-2 remains based on the TEEL-3/6 and the TEEL-1 continues to be the 0.005 ppm TLV-TWA x 3.
• TEEL-1 = TLV-TWA (0.005 ppm) x 3
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat 4-hr LC50 (86 ppm)
This review generated TEEL-2 and TEEL-3 values that are more conservative than Rev. 29A. The prior TEEL-3 basis was also a rat 4-hr LC50 exposure (1350 mg/m3), which is less conservative than the currently recommended basis, but it was from a safety data sheet that could not be independently verified and was therefore determined to be a less reliable source than the current source (Section 3.3.1). The TEEL-2 remains based on the TEEL-3/6 and the TEEL-1 continues to be the 0.005 ppm TLV-TWA x 3.
References
National Center for Biotechnology Information (2023). PubChem Compound Summary for CID 642197, 1,4-Dichloro-2-butene, (2E)-. Retrieved from https://pubchem.ncbi.nlm.nih.gov/compound/1_4-Dichloro-2-butene_-_2E
https://haz-map.com/Agents/1401?referer=Search&referer_data[s]=764-41-0&return_url=%2fSearch%3fdofilter%3d1%26f%255Btab%255D%3dtab1%26f%255Bs%255D%3d764-41-0
Sigma-Aldrich SDS, 9/25/2023; https://www.sigmaaldrich.com/US/en/sds/aldrich/159328