PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pentaborane | 19624-22-7 | 1380 |
18.00
14.01
4.01
11.01
15.02
4.05
7.01
7.00
4.07
3.05
|
|||||||||
| Formula | Synonyms | |||||||||||
| B5H9 | PENTABORANE, (9)-PENTABORON NONAHYDRIDE, BORANE (B5H9), BORON HYDRIDE (B5H9), NONAHYDROPENTABORANE, PENTABORANE (B5H9), PENTABORANE (DOT FRENCH), PENTABORANE(9), PENTABORANO (DOT SPANISH), PENTABORON NONAHYDRIDE | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 63.14 | L | -46.6 | 60 | 170 | 25 | 0.61 @ 0°C | 4200 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.015 | 0.14 | 0.51 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.039 | 0.36 | 1.3 |
Technical Basis
A review of available sources identified exposure limits for this chemical including a TLV-TWA, TLV-STEL, AEGL-2 and AEGL-3. The AEGLs were selected as the TEEL-3 and TEEL-2 due to their priority among the emergency exposure limits (Section 1). Due to insufficient data, an AEGL-1 was not published; therefore, the TLV-STEL was selected as the TEEL-1.
• TEEL-1 = TLV-STEL (0.015 ppm)
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL values consistent with Rev. 29A.
• TEEL-1 = TLV-STEL (0.015 ppm)
• TEEL-2 = AEGL-2
• TEEL-3 = AEGL-3
This review generated TEEL values consistent with Rev. 29A.
References
AEGLs (Table 4-1) and chemical information (Table 4-2) retrieved from: https://www.epa.gov/aegl/pentaborane-results-aegl-program
TLV-STEL and TLV-TWA: https://www.osha.gov/chemicaldata/304