PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Iodine 125 17144-19-3
4.00
3.00
Formula Synonyms
I2
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
250 S
PAC Values
PAC Values (Original Units: ppm)
PAC-1 PAC-2 PAC-3
0.10 0.50 5.0
Converted PAC Values (mg/m3)
PAC-1 PAC-2 PAC-3
1.0 5.1 51
Technical Basis
Iodine-125 is a radioisotope of iodine; therefore, available exposure limits for Iodine (CASRN: 7553-56-2) were evaluated for TEEL development. Available iodine exposure limits include: ERPGs, IDLH, TLV-C, and TLV-STEL. Data sources were selected according to the hierarchy listed in Table 3.1. The ERPGs were selected as the TEELs, due to their use priority (Section 1).
Note: The radiological exposure hazard of iodine-125 dominates the inhalation chemical toxicity hazard. Evaluation of the exposure risk of iodine-125 may be more appropriately determined by a domain expert, such as a facility Radiation Safety Officer.
• TEEL-1 = ERPG-1 (iodine, CASRN: 7553-56-2)
• TEEL-2 = ERPG-2 (iodine, CASRN: 7553-56-2)
• TEEL-3 = ERPG-3 (iodine, CASRN: 7553-56-2)
This review generated TEEL values that are consistent with Rev. 29A.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/9859769. https://www.cancer.gov/publications/dictionaries/cancer-drug/def/iodine-i-125
Iodine chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Iodine
Iodine exposure limits: https://www.osha.gov/chemicaldata/588
Search Again
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.