PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Zinc oxide | 1314-13-2 | 3077 |
11.01
4.08
7.01
11.00
4.07
10.00
5.10
3.11
16.01
16.02
|
|||||||||
| Formula | Synonyms | |||||||||||
| OZn | ZINC OXIDE, CRUDE (ENVIRONMENTALLY HAZARDOUS SUBSTANCES, SOL, ZINC PEROXIDE | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 81.41 | S | 1974 | 5.6 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 10 | 15 | 2500 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 3.0 | 4.5 | 750 |
Technical Basis
A review of available sources identified exposure limits (TWAs, STELs, ceiling limits, IDLH) and acute toxicity data (LC50, LDLo, TCLo) for several species and routes. Data sources were selected according to the hierarchy listed in Table 3.1. Toxicity data were selected according to type of exposure, species, and route according to the hierarchies stated in Sections 3.3.1, 3.3.2, and evaluated using factors in Tables 3.2, 3.3, and 3.4. The IDLH 1990 was selected as the TEEL-3. The REL-C was selected as the TEEL-2. The TLV-STEL was selected as the TEEL-1.
• PAC-1 = TEEL-1 = TLV-STEL (10 mg/m3)
• PAC-2 = TEEL-2 = REL-C (15 mg/m3)
• PAC-3 = TEEL-3 = IDLH 1990 (2500 mg/m3)
This review generated PAC values consistent with Rev. 29A.
• PAC-1 = TEEL-1 = TLV-STEL (10 mg/m3)
• PAC-2 = TEEL-2 = REL-C (15 mg/m3)
• PAC-3 = TEEL-3 = IDLH 1990 (2500 mg/m3)
This review generated PAC values consistent with Rev. 29A.
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Zinc-White.
Exposure limits: https://www.osha.gov/chemicaldata/215
REL-C and IDLH: https://www.cdc.gov/niosh/idlh/1314132.html