PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Methacrylic acid | 79-41-4 | 2531 |
11.01
14.02
14.01
4.08
4.01
11.00
7.01
4.07
7.11
3.08
|
|||||||||
| Formula | Synonyms | |||||||||||
| H2C=C(CH3)CO.OH | METHACRYLIC ACID, 2-METHYL PROPENIC ACID, 2-METHYL-2-PROPENOIC ACID, 2-METHYLACRYLIC ACID, 2-METHYLENEPROPIONIC ACID, 2-METHYLPROPENOIC ACID, ALPHA-METHACRYLIC ACID, ALPHA-METHYLACRYLIC ACID, GE 110, METHACRYLIC ACID (GLACIAL), METHACRYLIC ACID (INHIBITED), METHYLACRYLIC ACID, PROPENIONIC ACID, 2-METHYLENE, UN 2531 | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 86.1 | L | 16 | 163 | 1 | 25.5 | 1.014 | 16000 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 6.7 | 61 | 220 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 24 | 210 | 770 |
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). Values in units mg/m3 are reported as published in the technical support Table 1, per Section 3.4.7.2.
• TEEL-1 = AEGL-1
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL ppm values consistent with Rev. 29A. Differences in the reported TEEL-3 and TEEL-2 values in units mg/m3 may be due to conversion and rounding of these values, instead of use of source values.
• TEEL-1 = AEGL-1
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL ppm values consistent with Rev. 29A. Differences in the reported TEEL-3 and TEEL-2 values in units mg/m3 may be due to conversion and rounding of these values, instead of use of source values.
References
AEGLs (Table 1) and chemical information (Table 2) retrieved from: https://www.epa.gov/aegl/methacrylic-acid-results-aegl-program