PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Methyl isocyanate | 624-83-9 | 2480 |
13.00
14.01
4.01
11.01
14.02
4.08
4.05
7.01
8.00
7.00
|
|||||||||
| Formula | Synonyms | |||||||||||
| C2H3NO | METHYL ISOCYANATE, ISO-CYANATOMETHANE, ISOCIANATO DE METILO (DOT SPANISH), ISOCYANATE DE MÉTHYLE (DOT FRENCH), ISOCYANATOMETHANE, ISOCYANIC ACID, METHYL ESTER, METHANE, ISOCYANATO-, METHYL CARBONIMIDE, METHYL ESTER ISOCYANIC ACID, METHYL ESTER OF ISOCYANIC ACID, MIC, RCRA WASTE NUMBER P064, TL 1450 | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 57.05 | L | -45 | 38.3 | 750 | 38.8 | 0.9588 @ 20°C | 53000 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.025 | 0.067 | 0.20 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.058 | 0.16 | 0.47 |
Technical Basis
A review of available sources identified exposure limits for this chemical including an AEGL-2 and AEGL-3 and ERPGs. The AEGLs were selected as the TEEL-2 and TEEL-3 due to their priority among the emergency exposure limits (Section 1). Due to insufficient data, an AEGL-1 does not exist for this chemical, therefore the ERPG-1 was selected as the TEEL-1.
• TEEL-1 = ERPG-1
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL values that are consistent with Rev. 29A*.
• TEEL-1 = ERPG-1
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL values that are consistent with Rev. 29A*.
References
AEGLs: https://www.epa.gov/aegl/methyl-isocyanate-results-aegl-program
ERPGs: https://cameochemicals.noaa.gov/chemical/1112