PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Zirconium oxide | 1314-23-4 |
15.01
11.01
15.02
|
||||||||||
| Formula | Synonyms | |||||||||||
| O2Zr | ||||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 123.22 | S |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 14 | 110 | 680 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 2.8 | 22 | 130 |
Technical Basis
A review of available sources identified exposure limits for zirconium compounds (as Zr, CASRN: 7440-67-7) including short term exposure limits (PEL, REL, TLV) and an IDLH. Data sources were selected according to the hierarchy listed in Table 3.1. The zirconium IDLH was selected as the TEEL-3 basis and the TLV-STEL as the TEEL-1 basis. A compound adjustment factor was applied to these exposure limits (Section 3.2.2). TEEL-2 values were derived according to Table 3.5.
• TEEL-1 = MW-adjusted TLV-STEL (zirconium, CASRN: 7440-67-7, 10 mg/m3)
• TEEL-2 = TEEL-3/6
• TEEL-3 = MW-adjusted IDLH (1990, CASRN: 7440-67-7, 500 mg/m3)
This review generated TEEL values that are consistent with Rev. 29A*.
• TEEL-1 = MW-adjusted TLV-STEL (zirconium, CASRN: 7440-67-7, 10 mg/m3)
• TEEL-2 = TEEL-3/6
• TEEL-3 = MW-adjusted IDLH (1990, CASRN: 7440-67-7, 500 mg/m3)
This review generated TEEL values that are consistent with Rev. 29A*.
References
https://www.cdc.gov/niosh/idlh/7440677.html
https://www.osha.gov/chemicaldata/547
https://www.americanelements.com/zirconium-oxide-1314-23-4