PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Trichloroacetaldehyde hydrate; (Chloral hydrate) | 302-17-0 |
6.00
4.01
4.08
4.05
7.01
8.00
7.00
11.00
4.09
4.10
|
||||||||||
| Formula | Synonyms | |||||||||||
| C2H3Cl3O2 | CHLORAL HYDRATE, 1,1,1-TRICHLORO-2,2-DIHYDROXYETHANE, 1,1,1-TRICHLORO-2,2-ETHANEDIOL, 1,1-ETHANEDIOL, 2,2,2-TRICHLORO-, 2,2,2-TRICHLORO-1,1-ETHANEDIOL, AQUACHLORAL, BI 3411, CHLORAL, MONOHYDRATE, CHLORALDURAT, DORMAL, ESCRE, FELSULES, HS, HYDRAL, HYDRATE DE CHLORAL, KESSODRATE, LORINAL, NOCTEC, NORTEC, NYCOTON, NYCTON, PHALDRONE, RECTULES, SK-CHLORAL HYDRATE, SOMNI SED, SOMNOS, SONTEC, TOSYL, TRAWOTOX, TRICHLOROACETALDEHYDE HYDRATE, TRICHLOROACETALDEHYDE MONOHYDRATE | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 165.4 | S | 57 | 15 | 25 | 1.9081 @ 20°C |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.93 | 10 | 61 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 6.3 | 68 | 410 |
Technical Basis
A review of available sources was unable to identify exposure limits for this chemical, but toxicity data was available. Trichloroacetaldehyde hydrate had toxicity data on a dog LD50 oral published in Park et al., 1996, which was selected as the TEEL-3 basis. TEEL-2 and TEEL-1 values were calculated from this TEEL-3, in accordance with guidelines in the handbook (Table 3.5).
TEEL-1 = TEEL-2 /11
TEEL-2 = TEEL-3 /6
TEEL-3 = Dog oral LD50 (1000 mg/kg)
This review generated less conservative TEEL values than those reported in Rev. 29A. In Rev. 29A the TEEL-3 basis was a rat, oral LD50 oral, however species of the current recommendation is a higher ranked species (dog > rat, see Section 3.3.2). In addition, previously used toxicity data on rat oral TDLo in Rev. 29A to calculate TEEL-2 was not found during research.
TEEL-1 = TEEL-2 /11
TEEL-2 = TEEL-3 /6
TEEL-3 = Dog oral LD50 (1000 mg/kg)
This review generated less conservative TEEL values than those reported in Rev. 29A. In Rev. 29A the TEEL-3 basis was a rat, oral LD50 oral, however species of the current recommendation is a higher ranked species (dog > rat, see Section 3.3.2). In addition, previously used toxicity data on rat oral TDLo in Rev. 29A to calculate TEEL-2 was not found during research.
References
See Table 2 in https://koreascience.kr/article/JAKO199611919898091.pdf