Technical Basis
A review of available sources identified acute toxicity study (LDLo, LD50) for various routes (oral, intravenous) and species (mouse, rabbit). 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. The higher priority mouse oral LD50 was selected as the TEEL-3 basis. TEEL-1 and -2 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 = Mouse oral LD50 (463 mg/kg)
This review generated PAC values that are consistent with Rev. 29A.