PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Thallium(I) carbonate (2:1) 6533-73-9 2811
4.01
4.08
4.05
7.01
8.00
11.00
4.02
4.09
4.10
4.07
Formula Synonyms
CO3Tl2 THALLOUS CARBONATE, CARBONIC ACID, DITHALLIUM (1+) SALT, CARBONIC ACID, DITHALLIUM(1+) SALT, CARBONIC ACID, THALLIUM (1+) SALT, DITHALLIUM CARBONATE, OXIME, THALLIUM CARBONATE, THALLIUM CARBONATE (TL2CO3), THALLIUM CARBONATE(TL2CO3), THALLIUM(1+) CARBONATE, THALLIUM(I) CARBONATE, THALLIUM(I) CARBONATE(2:1), THIOCHROMAN-4-ONE
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
468.78 S 273 25 7.11
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
0.18 2.0 23
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.0094 0.10 1.2
Technical Basis
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*.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Thallium-carbonate
IDLH (1990) for soluble thallium (CASRN: 7440-28-0): https://www.cdc.gov/niosh/idlh/thallium.html
LOC: Retrieved from Exhibit C-1 (page C-9) of the EPA’s Technical Guidance for Hazards Analysis: https://www.epa.gov/sites/default/files/2015-09/documents/technical_guidance_for_hazard_analysis.pdf
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PAC values marked with a subscript "A" correspond to 60-minute AEGL values.
PAC values marked with a subscript "E" correspond to ERPG values.
PAC values marked by * are >= 10% lower explosive limit (LEL) but < 50% LEL.
PAC values marked by ** are > 50% LEL but < 100% LEL.
PAC values marked by *** are >= LEL.