PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Aromatic isocyanate mixture "SWD 305A" z-0111
4.00
3.00
Formula Synonyms

Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
0 L
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
0.15 3.6 22
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0 0 0
Technical Basis
There were no available TEEL sources for this chemical; the SWD company website did not list the 305A product safety data sheet. Comparable products indicate this is a polyurethane product, which contains polyethylene polyphenyl isocyanate (PMDI, CASRN: 9016-87-9). As such, PMDI was identified as a similar chemical and evaluated as the TEEL basis. Sources available for PMDI included: a MAK-TWA and rat LC50 acute toxicity data. Data sources were selected according to the hierarchy listed in Table 3.1. The rat LC50 was selected as the TEEL-3 basis, scaled to a 60-minute equivalent using the ten Berge equation (Section 3.3.4), and evaluated using factors in Table 3.4. TEEL-2 values were derived according to Table 3.5. The MAK-TWA was selected as the TEEL-1 basis.
• TEEL-1 = MAK-TWA (0.05 mg/m3, PMDI CASRN: 9016-87-9) x 3
• TEEL-2 = TEEL-3/6
• TEEL-3 = Rat LC50 (490 mg/m3/4H, PMDI CASRN: 9016-87-9).
This review generated TEEL values consistent with Rev. 29A.
References
Rat LC50. (PMDI, CASRN:9016-87-9). Retrieved from: https://haz-map.com/Agents/1087
MAK-TWA (PMDI, CASRN:9016-87-9). Retrieved from: https://onlinelibrary.wiley.com/doi/pdf/10.1002/9783527695539.oth1
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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.