PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Trimethoxysilane | 2487-90-3 | 9269 |
14.01
4.01
11.01
10.00
16.02
|
|||||||||
| Formula | Synonyms | |||||||||||
| C3H10O3Si | TRIMETHOXYSILANE, LS 330, TRIMÉTHOXYSILANE (DOT FRENCH), TRIMETOXISILANO (DOT SPANISH) | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 122.2 | L | -115 | 76 | 25 | 0.860 @ 20°C |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.50 | 0.83 | 2.5 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 2.5 | 4.1 | 12 |
Technical Basis
A review of available sources identified ERPGs and an AEGL-2 and AEGL-3 for this chemical. The ERPG-1, AEGL-2, and AEGL-3 were selected as the TEELs due to their priority among the emergency exposure limits (Section 1). Values in units mg/m3 are reported as published in the technical support document Table 7-1, per handbook guidance (Section 3.4.7.2).
• TEEL-1 = ERPG-1
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL ppm values consistent with Rev. 29A. Differences in the reported TEEL-2 and TEEL-3 values in units mg/m3 may be due to conversion and rounding of these values, instead of use of source values.
• TEEL-1 = ERPG-1
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL ppm values consistent with Rev. 29A. Differences in the reported TEEL-2 and TEEL-3 values in units mg/m3 may be due to conversion and rounding of these values, instead of use of source values.
References
AEGLs (Table 7-1) and chemical information (Table 7-3) retrieved from: https://www.epa.gov/aegl/trimethoxysilane-results-aegl-program
ERPGs: https://cameochemicals.noaa.gov/chemical/12878