PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bioxirane, 2,2'-; (1,2:3,4-Diepoxybutane) | 1464-53-5 |
14.01
4.01
14.02
2.00
10.00
3.02
12.00
5.00
5.10
3.11
|
||||||||||
| Formula | Synonyms | |||||||||||
| C4.H6.O2 | DIEPOXYBUTANE, 1,1^-BI(ETHYLENE OXIDE), 1,1'-BI[ETHYLENE OXIDE], 1,2:3,4- DIEPOXYBUTANE, 1,2:3,4-DIEPOXYBUTANE, 1,3-BUTADIENE DIEPOXIDE, 2,2'-BIOXIRANE, 2,4-DIEPOXYBUTANE, BIOXIRAN, BIOXIRANE, BUTADIENE DIEPOXIDE, BUTADIENE DIOXIDE, BUTANE DIEPOXIDE, BUTANE, 1,2:3,4-DIEPOXY-, DEB, DIOXYBUTADIENE, ENT-26592, ERYTHRITOL ANHYDRIDE, NSC 629, THREITOL, 1,2:3,4-DIANHYDRO- | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 86.1 | L | 19 | 142 | 16 | 25 | 1.113 @ 18°C |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.090 | 0.99 | 4.0 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.32 | 3.5 | 14 |
Technical Basis
A review of available sources identified rat and mouse acute toxicity data (LD50, LC50) for various routes, and a LOC. 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 The most preferred exposure, a 4-hour rat LC50, was selected as the TEEL-3 basis and it was scaled to a 60-minute equivalent using the ten Berge equation (Section 3.3.4). The LOC was selected as the TEEL-2. The TEEL-1 value was derived according to Table 3.5.
• PAC-1 = TEEL-1 = TEEL-2/11
• PAC-2 = TEEL-2 = LOC (0.0035 g/m3)
• PAC-3 = TEEL-3 = Rat LC50 (90 ppm/4H)
This review generated PAC mg/m3 values that are consistent with Rev. 29A. The minor differences in the PAC-1 and PAC-2 in ppm may be due to rounding.
• PAC-1 = TEEL-1 = TEEL-2/11
• PAC-2 = TEEL-2 = LOC (0.0035 g/m3)
• PAC-3 = TEEL-3 = Rat LC50 (90 ppm/4H)
This review generated PAC mg/m3 values that are consistent with Rev. 29A. The minor differences in the PAC-1 and PAC-2 in ppm may be due to rounding.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/2_2_-Bioxirane
Rat LC50: Shell Chemical Company. Unpublished Report., -(2), 1961. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/2_2_-Bioxirane
LOC: Appendix C (page C-4); https://www.epa.gov/sites/default/files/2015-09/documents/technical_guidance_for_hazard_analysis.pdf