A review of available sources did not identify exposure limits or acute toxicity data for bismuth acetate. The GHS health hazard ratings for this chemical are limited, with one available SDS reporting Category 2-3 hazards (H315, H319, Category 2; H335, Category 3). These ratings indicate a mid-level health hazard; however, per PubChem, the chemical does not meet GHS hazard criteria for 100% of all reports and is therefore not classified. Considering this, exposure limits and GHS ratings for the chemical’s components, acetic acid (CASRN: 64-19-7) and bismuth (CASRN: 7440-69-9) were evaluated. Bismuth also does not meet GHS hazard criteria for 84.3% of all reports and is not classified; however, reported GHS ratings for acetic acid (H315, H319, Category 2); H335, Category 3; H302, Category 4) indicate mid-level health hazards. In addition, the ERPG-3 for acetic acid (25 ppm, 610 mg/m3) was reviewed and is in the same order of magnitude as HHR=2. As such, analysts assumed an HHR=2 as the TEEL-3 basis (Section 3.4.5). 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 = HHR=2
This review generated PAC values inconsistent with Rev. 29A. The Rev. 29A TEEL-1 basis was a TLV-TWA for particles not otherwise specified (Section 3.5.2), from which the TEEL-2 and TEEL-3 were derived (Table 3.5). The current TEEL-3 basis is an assumed HHR=2, from analysis of the GHS health hazard statements for bismuth acetate and its components, acetic acid (CASRN: 64-19-7) and bismuth (CASRN: 7440-69-9). The current TEEL-2 and TEEL-1 were derived (Table 3.5) from this TEEL-3.