PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Copper 7440-50-8
15.01
11.01
15.02
7.00
4.09
4.06
4.10
4.07
3.08
12.00
Formula Synonyms
Cu COPPER, COPPER METAL DUSTS, COPPER METAL FUMES
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
63.55 S 1084.62 2562 1236 8.96
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
3.0 33 200
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
1.2 13 77
Technical Basis
A review of available sources identified exposure limits (IDLH (1990 & 1994) for copper (dusts & mists), TLV-TWA) and acute toxicity data (LD50, LDLo, TDLo) for several routes and species. Data sources were selected according to the hierarchy listed in Table 3.1. The IDLHs were evaluated; the 1990 IDLH was developed from the PEL-TWA x 2000, a protective factor. The 1994 IDLH was developed from acute toxicity data for copper compounds that are soluble, insoluble, organic, and inorganic; the summary indicates the reported value may “be conservative due to the lack of relevant acute inhalation toxicity”. Considering this, analysts did not select either IDLH as a TEEL-3. Available human toxicity data (TDLo) were evaluated, but they did not toxicity endpoints appropriate for TEEL development (Section 3.3.2). The TLV-TWA was selected as the TEEL-1 basis. TEEL-2 and TEEL-3 values were derived according to Table 3.5.
• PAC-1 = TEEL-1 = TLV-TWA x 3 (dusts & mists,1 mg/m3)
• PAC-2 = TEEL-2 = TEEL-1 x 11
• PAC-3 = TEEL-3 = TEEL-2 x 6
This review generated PAC values consistent with Rev. 29A.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Copper.
Copper (as dusts & mists) (CASRN: 7440-50-8) IDLH (1990 & 1994): https://www.cdc.gov/niosh/idlh/7440508.html
Copper fume (CuO, CASRN: 1317-38-0) IDLH (1990 & 1994): https://www.cdc.gov/niosh/idlh/1317380.html
Copper, dusts & mists TLV-TWA: https://www.osha.gov/chemicaldata/1030
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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.