PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Styrene oxide; (1,2-Epoxyethylbenzene) | 96-09-3 | 1760 |
15.01
15.02
4.01
4.05
11.00
4.06
4.10
4.07
2.00
2.02
|
|||||||||
| Formula | Synonyms | |||||||||||
| C8H8O | STYRENE OXIDE, (.+-.)-PHENYLETHYLENE OXIDE, (.+-.)-PHENYLOXIRANE, (.+-.)-STYRENE OXIDE, (EPOXYETHYL)BENZENE, 1,2-EPOXYETHYLBENZENE, 1-PHENYL-1,2-EPOXYETHANE, 1-PHENYLOXIRANE, 2-PHENYLOXIRANE, ALPHA,BETA-EPOXYSTYRENE, BENZENE, (EPOXYETHYL)-, EPOXYETHYLBENZENE, EPOXYSTYRENE, ETHANE, 1,2-EPOXY-1-PHENYL-, NCI-C54977, PHENETHYLENE OXIDE, PHENYLETHYLENE OXIDE, PHENYLOXIRANE, STYRENE 1^,2'-OXIDE, STYRENE 7,8-OXIDE, STYRENE EPOXIDE, STYRENE-7,8-OXIDE, STYRYL OXIDE | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 120.16 | L | -36.7 | 194.2 | 0.3 | 20 | 1.046 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.33 | 3.6 | 21 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 1.6 | 18 | 100 |
Technical Basis
A review of available sources identified several animal toxicity sources. 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. Of the available sources, the most preferred, a rat 4-hr LCLo was selected as the TEEL-3 basis. The LCLo was scaled to a 60-minute equivalent using the ten Berge equation (Section 3.3.4). TEEL-2 and TEEL-1 values were calculated according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat 4-hr LCLo (500 ppm)
This review generated TEEL values that are consistent with those in Rev. 29A. There are no changes to the TEEL results or methods.
• TEEL-1 = TEEL-2/11
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat 4-hr LCLo (500 ppm)
This review generated TEEL values that are consistent with those in Rev. 29A. There are no changes to the TEEL results or methods.
References
National Center for Biotechnology Information (2023). PubChem Compound Summary for CID 7276, Styrene oxide. Retrieved from https://pubchem.ncbi.nlm.nih.gov/compound/Styrene-oxide
AMA Archives of Industrial Hygiene and Occupational Medicine., 10(61), 1954; via PubChem: National Center for Biotechnology Information (2023). PubChem Compound Summary for CID 7276, Styrene oxide. Retrieved from https://pubchem.ncbi.nlm.nih.gov/compound/Styrene-oxide