PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dimethylhydrazine, 1,1- | 57-14-7 | 1163 |
14.01
4.01
11.01
14.02
4.08
4.05
7.01
8.00
7.00
11.00
|
|||||||||
| Formula | Synonyms | |||||||||||
| C2H8N2 | 1,1-DIMETHYLHYDRAZINE, 1,1-DIMETHYL HYDRAZINE, 1,1-DIMETILHIDRAZINA (DOT SPANISH), AS-DIMETHYLHYDRAZINE, ASYM DIMETHYLHYDRAZINE, ASYMMETRIC DIMETHYLHYDRAZINE, DIMAZIN, DIMAZINE, DIMÉTHYL-1,1 HYDRAZINE (DOT FRENCH), DIMETHYLHYDRAZINE, DIMETHYLHYDRAZINE UNSYMMETRICAL, DIMÉTHYLHYDRAZINE, ASYMÉTRIQUE (DOT FRENCH), DIMETHYLHYDRAZINE, UNSYMMETRICAL, DIMETILHIDRAZINA, ASIMÉTRICA (DOT SPANISH), DMH, GEM-DIMETHYLHYDRAZINE, HYDRAZINE, 1,1-DIMETHYL, HYDRAZINE, 1,1-DIMETHYL-, N,N-DIMETHYLHYDRAZINE, RCRA WASTE NUMBER U098, U-DIMETHYLHYDRAZINE, UDMH, UN 1163, UNS-DIMETHYLHYDRAZINE, UNSYM-DIMETHYLHYDRAZINE, UNSYMMETRICAL DIMETHYLHYDRAZINE, UNSYMMETRICAL-DIMETHYLHYDRAZINE | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 60.098 | L | -57.2 | 63.9 | 75 | 10.5 | 0.791 @ 22°C | 20000 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.020 | 3.0 | 11 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.049 | 7.4 | 27 |
Technical Basis
A review of available sources identified exposure limits (AEGL-2, AEGL-3, TWAs, OEL-STELs) for this chemical. The AEGL-3 and AEGL-2 were selected due to their priority among Protective Action Criteria (Section 1). The OEL-STEL (Demark) was selected as the TEEL-1.
• PAC-1 = TEEL-1 = OEL-STEL (Denmark, 0.02 ppm/ 0.05 mg/m3)
• PAC-2 = AEGL-2
• PAC-3 = AEGL-3
This review generated a PAC-1 value inconsistent with Rev. 29A. The Rev. 29A TEEL-1 was derived from the TEEL-2 (Table 3.5), while the current basis is an exposure limit, OEL-STEL. The Rev. 29A and current PAC-2 and PAC-3 values, source, and methodology are consistent.
• PAC-1 = TEEL-1 = OEL-STEL (Denmark, 0.02 ppm/ 0.05 mg/m3)
• PAC-2 = AEGL-2
• PAC-3 = AEGL-3
This review generated a PAC-1 value inconsistent with Rev. 29A. The Rev. 29A TEEL-1 was derived from the TEEL-2 (Table 3.5), while the current basis is an exposure limit, OEL-STEL. The Rev. 29A and current PAC-2 and PAC-3 values, source, and methodology are consistent.
References
AEGLs (Table 4-1) and chemical information (Table 4-2) retrieved from: https://www.epa.gov/aegl/11-dimethyl-hydrazine-results-aegl-program
OEL-STEL: https://ilv.ifa.dguv.de/limitvalues/22784