PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dibenzo-p-dioxin | 262-12-4 |
3.11
|
||||||||||
| Formula | Synonyms | |||||||||||
| C12.H8.O2 | DIBENZO-P-DIOXIN, DIBENZO(1,4)DIOXIN, DIBENZO(B,E)(1,4)DIOXIN, DIBENZODIOXIN, DIBENZO[1,4]DIOXIN, DIPHENYLENE DIOXIDE, NCI- C03656, OXANTHRENE, PHENODIOXIN | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 184.2 | S | 119 | 0.0004125 | 25 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 3.7 | 40 | 240 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.49 | 5.3 | 32 |
Technical Basis
A review of available sources identified rat and mouse acute toxicity data (LD50) for various routes. Data sources were selected according to the hierarchy listed in Table 3.1. Toxicity data were selected according to type of exposure, species, and route according to the hierarchies stated in Sections 3.3.1, 3.3.2, and evaluated using factors in Tables 3.2, 3.3, and 3.4. The most preferred species and route data, a rat oral LD50, was selected as the TEEL-3 basis. TEEL-1 and TEEL-2 values were derived according to Table 3.5.
• PAC-1 = TEEL-1 = TEEL-2/11
• PAC-2 = TEEL-2 = TEEL-3/6
• PAC-3 = TEEL-3 = Rat oral LD50 (1220 mg/kg)
This review generated PAC values consistent with Rev. 29A.
• PAC-1 = TEEL-1 = TEEL-2/11
• PAC-2 = TEEL-2 = TEEL-3/6
• PAC-3 = TEEL-3 = Rat oral LD50 (1220 mg/kg)
This review generated PAC values consistent with Rev. 29A.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Dibenzo-p-dioxin
Rat oral LD50: Lewis, R.J. Sax's Dangerous Properties of Industrial Materials. 9th ed. Volumes 1-3. New York, NY: Van Nostrand Reinhold, 1996., p. 1054. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Dibenzo-p-dioxin.