PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Selenium monosulfide | 7446-34-6 | 2811 |
15.01
4.01
11.01
4.05
7.00
11.00
2.00
3.09
3.02
3.10
|
|||||||||
| Formula | Synonyms | |||||||||||
| SSe | SELENIUM SULFIDE, SULFUR SELENIDE (SSE), NCI-C50033, RCRA WASTE NUMBER U205, SELENIUM MONOSULFIDE, SELENIUM SULPHIDE, SELSUN SULFIDE, SULFUR SELENIDE | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 111.02 | S | 111.03 | 3.056 @ 0°C |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.84 | 1.3 | 7.5 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.18 | 0.29 | 1.7 |
Technical Basis
A review of available sources identified acute toxicity data (LD50, LDLo) for several species (mouse, rabbit, rat). In addition, there are exposure limits available for selenium (TWAs, IDLH, CASRN: 7782-49-2). 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. Although there is an IDLH for selenium available, the 1990 (100 mg/m3) and 1994 (1 mg/m3) were both determined to be inappropriate for selenium monosulfide TEEL development, given that the acute toxicity sources cited are primarily selenite compounds. Considering this, the most preferred route and species toxicity data, a rat oral LD50¬, was selected as the TEEL-3 basis. The selenium TLV-TWA was selected as the TEEL-1 basis and a compound adjustment factor applied (Section 3.2.2) The TEEL-2 value was derived according to Table 3.5.
• TEEL-1 = MW-adjusted TLV-TWA (selenium, CASRN: 7782-49-2, 0.2 mg/m3) x 3
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat oral LD50 (38 mg/kg)
This review generated TEEL values that are consistent with Rev. 29A*.
• TEEL-1 = MW-adjusted TLV-TWA (selenium, CASRN: 7782-49-2, 0.2 mg/m3) x 3
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat oral LD50 (38 mg/kg)
This review generated TEEL values that are consistent with Rev. 29A*.
References
Chemical info: https://pubchem.ncbi.nlm.nih.gov/compound/7446-34-6
Clinical Toxicology., 17(171), 1980 [PMID:6998645]. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/7446-34-6.
Selenium TLV-TWA: https://www.osha.gov/chemicaldata/649
Selenium IDLH: https://www.cdc.gov/niosh/idlh/7782492.html