PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Barium dioxide; (Barium peroxide) | 1304-29-6 | 1449 |
14.01
4.01
11.01
14.02
4.08
11.00
4.09
4.07
4.11
|
|||||||||
| Formula | Synonyms | |||||||||||
| Ba.O2 | BARIUM PEROXIDE, BARIUM BINOXIDE, BARIUM DIOXIDE, BARIUM OXIDE (BAO2), BARIUM SUPEROXIDE, PERÓXIDO DE BARIO (DOT SPANISH), PEROXYDE DE BARYUM (DOT FRENCH) | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 169.34 | S | 450 | 4.96 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 1.8 | 51 | 310 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.26 | 7.4 | 45 |
Technical Basis
A review of available sources identified exposure limits for soluble barium (CASRN: 7440-39-3): TLV-TWA and IDLH (1990, 1994). The 1990 IDLH was evaluated and was selected as the TEEL-3 basis per guidance in the handbook (Table 3.1, Section 3.2). The IDLH was adjusted using a compound adjustment factor (Section 3.2.2). The TEEL-2 was derived according to Table 3.5. The TLV-TWA was selected as the TEEL-1 basis and adjusted using a compound adjustment factor (Section 3.2.2).
• TEEL-1 = MW-adjusted TLV-TWA (0.5 mg/m3, soluble barium, CASRN: 7440-39-3)
• TEEL-2 = TEEL-3/6
• TEEL-3 = MW-adjusted IDLH (1990, 250 mg/m3, soluble barium CASRN: 7440-39-3)
This review generated TEEL-3 and TEEL-2 values that are more conservative than those in Rev. 29A. The Rev. 29A TEEL-3 basis was the revised IDLH, which is a less preferred source than the 1990 values. The current TEEL-1 and Rev. 29A method and values are consistent.
• TEEL-1 = MW-adjusted TLV-TWA (0.5 mg/m3, soluble barium, CASRN: 7440-39-3)
• TEEL-2 = TEEL-3/6
• TEEL-3 = MW-adjusted IDLH (1990, 250 mg/m3, soluble barium CASRN: 7440-39-3)
This review generated TEEL-3 and TEEL-2 values that are more conservative than those in Rev. 29A. The Rev. 29A TEEL-3 basis was the revised IDLH, which is a less preferred source than the 1990 values. The current TEEL-1 and Rev. 29A method and values are consistent.
References
https://www.osha.gov/chemicaldata/530
https://www.cdc.gov/niosh/idlh/7440393.html