PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sulfur trioxide | 7446-11-9 |
14.01
11.01
4.01
14.02
4.08
11.00
4.02
4.10
4.07
2.00
|
||||||||||
| Formula | Synonyms | |||||||||||
| O3S | ||||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 80.06 | L |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.20 | 8.7 | 160 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.061 | 2.7 | 49 |
Technical Basis
A review of available sources identified AEGLs for this chemical. The AEGLs were selected as the TEELs due to their priority among the emergency exposure limits (Section 1).
• TEEL-1 = AEGL-1
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL values consistent with Rev. 29A*.
• TEEL-1 = AEGL-1
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL values consistent with Rev. 29A*.
References
AEGLs (Summary table, pg. vii) and chemical information (Table 2) retrieved from: https://www.epa.gov/aegl/sulfur-trioxide-results-aegl-program