PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Methacrylaldehyde | 78-85-3 | 2396 |
14.01
14.02
11.01
|
|||||||||
| Formula | Synonyms | |||||||||||
| C4H6O | METHACRYLALDEHYDE, 2-FORMYL-1-PROPENE, 2-METHYL-2-PROPENAL, 2-METHYLACROLEIN, 2-METHYLENEPROPANAL, 2-METHYLPROPENAL, ALPHA-METHACROLEIN, ALPHA-METHYLACROLEIN, ALPHA-METHYLACRYLALDEHYDE, ISOBUTENAL, METACRILALDEHÍDO (DOT SPANISH), METACRILALDEHÍDO, INHIBIDO (DOT SPANISH), METHACROLEIN, METHACRYLALDEHYDE, INHIBITED, METHACRYLIC ALDEHYDE, METHYLACROLEIN, MÉTHYLACROLÉINE (DOT FRENCH), MÉTHYLACROLÉINE, STABILISÉE (DOT FRENCH), METHYLACRYLALDEHYDE | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 70.1 | L | -81 | 120 | 20 | 0.830 @ 20°C |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.20 | 0.33 | 3.5 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.57 | 0.95 | 10 |
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 ppm values that are consistent with Rev. 29A. Minor differences in the reported TEEL-1 and TEEL-2 values in units of mg/m3 may be due to rounding.
• TEEL-1 = AEGL-1
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL ppm values that are consistent with Rev. 29A. Minor differences in the reported TEEL-1 and TEEL-2 values in units of mg/m3 may be due to rounding.
References
https://www.epa.gov/aegl/methacrylaldehyde-results-aegl-program