PAC Database - Detailed Chemical Data

Chemical Identity
Chemical CAS# UN# Health Code Numbers
Lanthanum 7439-91-0
11.01
15.01
15.02
4.01
4.06
3.10
10.00
Formula Synonyms
La
Physical Properties
Mol Wt State MP (°C) BP (°C) VP (Hg) VP (°C) SG LEL (ppm)
138.91 S 920 3464 6.166
PAC Values
PAC Values (Original Units: mg/m3)
PAC-1 PAC-2 PAC-3
30 330 2000
Converted PAC Values (ppm)
PAC-1 PAC-2 PAC-3
5.3 58 350
Technical Basis
A review of available sources did not identify exposure limits, acute toxicity data, or GHS health hazard ratings for lanthanum. The PNOS TLV-TWA was selected as the TEEL-1 basis (Section 3.5.2). TEEL-3 and TEEL-2 values were derived according to Table 3.5.
• PAC-1 = TEEL-1 = TLV-TWA (PNOS, 10 mg/m3) x 3
• 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/Lanthanum
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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.