PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diketene; (Ketene dimer) | 674-82-8 | 2521 |
11.01
14.01
15.02
11.00
4.01
4.07
4.11
|
|||||||||
| Formula | Synonyms | |||||||||||
| C4H4O2 | DIKETENE, INHIBITED, 3-BUTENOIC ACID, 3-HYDROXY-, BETA-LACTONE, 4-METHYLENE-2-OXETANONE, DICÉTÈNE, STABILISÉ (DOT FRENCH), DICETENO, INHIBIDO (DOT SPANISH), DIKETENE, ETHENONE, DIMER, KETENE DIMER | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 84.07 | L | -6.5 | 126.1 | 7.5 | 19.3 | 1.0877 @ 20°C |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.091 | 1.0 | 3.0 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.31 | 3.4 | 10 |
Technical Basis
A review of available sources identified an AEGL-2 and AEGL-3 for this chemical. 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 TEEL-1 value was derived according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL values consistent with Rev. 29A*.
• TEEL-1 = TEEL-2/11
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL values consistent with Rev. 29A*.
References
Chemical information: Retrieved from Table 2-2 of the EPA Technical Support Document. https://www.epa.gov/aegl/diketene-results-aegl-program
AEGLs: https://www.epa.gov/aegl/diketene-results-aegl-program