PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Copper(I) sulfide 22205-45-4
3.10
3.05
3.09
3.08
7.10
7.11
12.00
3.06
Formula Synonyms
Cu2.S
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
159.14 S 5.6
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
0.25 2.8 17
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
0.038 0.43 2.6
Technical Basis
A review of available sources did not identify exposure limits or acute toxicity data for copper(I) sulfide. Instead, analysts evaluated exposure limits (OEL-STEL, OEL-TWA) for inorganic copper compounds (CASRN: 7440-50-8) for TEEL development (Section 3.4.6). Data sources were selected according to the hierarchy listed in Table 3.1. The lowest reported inhalable fraction (Switzerland, 15-minute) was selected as the TEEL-1 basis and a compound adjustment factor was applied (Section 3.2.2) TEEL-2 and TEEL-3 values were derived according to Table 3.5.
• PAC-1 = TEEL-1 = MW-adjusted OEL-STEL (inorganic copper compound, Switzerland, CASRN: 7440-50-8; 0.2 mg/m3)
• PAC-2 = TEEL-2 = TEEL-1 x 11
• PAC-3 = TEEL-3 = TEEL-2 x 6
This review generated PAC values inconsistent with Rev. 29A. The Rev. 29A TEEL-1 basis was a weight adjusted TLV-TWA for copper, while the current TEEL-1 basis is a weight adjusted OEL-STEL (Table 3.5, see Note).
References
Chemical information: https://comptox.epa.gov/dashboard/chemical/details/DTXSID0041804
Inorganic copper OELs (CASRN: 7440-50-8): https://ilv.ifa.dguv.de/limitvalues/14676
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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.