PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cobaltous bromide; (Cobalt(II) bromide) | 7789-43-7 | 9103 |
15.01
15.02
8.00
7.01
4.09
4.06
4.07
2.00
7.11
3.11
|
|||||||||
| Formula | Synonyms | |||||||||||
| Br2Co | COBALTOUS BROMIDE, BROMURE COBALTEUX (DOT FRENCH), BROMURO COBALTOSO (DOT SPANISH), COBALT (II) BROMIDE, COBALT BROMIDE, COBALT DIBROMIDE, COBALT(II) BROMIDE | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 218.75 | S | 678 | 4.91 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.22 | 13 | 80 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.025 | 1.5 | 8.9 |
Technical Basis
A review of available sources identified acute toxicity data (LD50, LDLo) for several species and routes. In addition, analysts evaluated cobalt (Co and inorganic compounds, CASRN: 7440-48-4, TLV-TWA) for TEEL development. 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 toxicity data, a rat oral LD50, was selected as the TEEL-3 basis. The TEEL-2 value was derived according to Table 3.5. The TLV-TWA was selected as the TEEL-1 basis and a compound adjustment factor was applied (Section 3.2.2).
• TEEL-1 = MW-adjusted TLV-TWA (cobalt and inorganic compounds, CASRN: 7440-48-4; 0.02 mg/m3) x 3
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat oral LD50 (406 mg/kg)
This review generated TEEL values consistent with Rev. 29A.
• TEEL-1 = MW-adjusted TLV-TWA (cobalt and inorganic compounds, CASRN: 7440-48-4; 0.02 mg/m3) x 3
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat oral LD50 (406 mg/kg)
This review generated TEEL values consistent with Rev. 29A.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Cobaltous-sulfate-heptahydrate
Rat LD50. Food and Chemical Toxicology., 20(311), 1982 [PMID:7201957]. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Cobaltous-sulfate-heptahydrate
Cobalt and inorganic compounds TLV-TWA: https://www.osha.gov/chemicaldata/539