PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Cesium iodide 7789-17-5
15.01
11.01
15.02
7.01
11.00
4.07
7.11
10.00
3.07
4.11
Formula Synonyms
CsI
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
259.81 S 632 1280 4.51
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
7.2 79 470
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.68 7.4 44
Technical Basis
A review of limited sources identified rat acute toxicity data (LD50) for two routes. Data sources were selected according to the hierarchy listed in Table 3.1. Toxicity data were evaluated using factors in Tables 3.2, 3.3, and 3.4. The most preferred route toxicity, a rat oral LD50, was selected as the TEEL-3 basis. TEEL-2 and TEEL-1 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 (2386 mg/kg)
This review generated PAC values consistent with Rev. 29A. However, the Rev. 29A and current TEEL-1 methodology are different; the Rev. 29A TEEL-1 basis is reported as a TLV-TWA, which was not found during the current review. Instead, analyst derived the TEEL-1 from the TEEL-2 (Table 3.5).
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Cesium-iodide
Rat LD50. National Institute for Occupational Safety and Health, U.S. Dept. of Health, Education, and Welfare, Reports and Memoranda., TR-74(1), 1972. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Cesium-iodide
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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.