PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cerium oxalate | 139-42-4 |
15.01
11.01
15.02
7.00
4.09
4.07
7.10
3.09
3.07
|
||||||||||
| Formula | Synonyms | |||||||||||
| Ce.(C2.O4)2 | ||||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 316.1592 | S |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 120 | 1300 | 7900 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 9.3 | 100 | 610 |
Technical Basis
A review of available sources did not identify exposure limits or acute toxicity data for cerium oxalate. Reported GHS health hazard ratings (H302 and H312, Category 4) with acute toxicity oral and dermal data, indicate a low-level health hazard, approximately equivalent to an HHR=1. Analysts assumed an HHR=1 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=1
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=1, from analysis of GHS health hazard statements, from which TEEL-2 and TEEL-1 were derived (Table 3.5).
• PAC-1 = TEEL-1 = TEEL-2/11
• PAC-2 = TEEL-2 = TEEL-3/6
• PAC-3 = TEEL-3 = HHR=1
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=1, from analysis of GHS health hazard statements, from which TEEL-2 and TEEL-1 were derived (Table 3.5).
References
Chemical information and GHS Hazard statements: https://pubchem.ncbi.nlm.nih.gov/compound/Cerium-oxalate