PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thallium sulfate; (Sulfuric acid, dithallium(1+) salt) | 10031-59-1 |
4.08
4.05
7.01
8.00
7.00
11.00
4.09
4.10
4.07
3.08
|
||||||||||
| Formula | Synonyms | |||||||||||
| Tlx.SO4 | ||||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 1526.25 | S | 632 | 6.77 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.18 | 2.0 | 21 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.0029 | 0.032 | 0.34 |
Technical Basis
The chemical associated with this CASRN has an undefined number of moles thallium. A review of available sources identified a LOC and IDLH (1990) for soluble thallium (CASRN: 7440-28-0). Data sources were selected according to the hierarchy listed in Table 3.1. The IDLH (1990) was selected as the TEEL-3 basis and a compound adjustment factor was applied (Section 3.2.2). The LOC was selected as the TEEL-2. The TEEL-1 value was derived according to Table 3.5.
• TEEL-1 = TEEL-2/11
• TEEL-2 = LOC (0.002 g/m3)
• TEEL-3 = MW-adjusted IDLH (1990, thallium (soluble compounds), CASRN: 7440-28-0, 20 mg/m3)
This review generated TEEL values that are consistent with Rev. 29A*.
• TEEL-1 = TEEL-2/11
• TEEL-2 = LOC (0.002 g/m3)
• TEEL-3 = MW-adjusted IDLH (1990, thallium (soluble compounds), CASRN: 7440-28-0, 20 mg/m3)
This review generated TEEL values that are consistent with Rev. 29A*.
References
Chemical information: https://www.epa.gov/sites/default/files/2015-09/documents/technical_guidance_for_hazard_analysis.pdf Molecular formula: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/166801
IDLH (1990) for soluble thallium (CASRN: 7440-28-0): https://www.cdc.gov/niosh/idlh/thallium.html
LOC. Appendix C, pg. C-9. https://www.epa.gov/sites/default/files/2015-09/documents/technical_guidance_for_hazard_analysis.pdf