PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fluoboric acid; (Tetrafluoroboric acid) | 16872-11-0 | 1775 |
8.00
7.01
11.01
14.01
14.02
4.07
11.00
7.00
4.10
|
|||||||||
| Formula | Synonyms | |||||||||||
| B.F4.H | FLUOBORIC ACID, ACIDE FLUOBORIQUE (DOT FRENCH), ACIDE FLUOROBORIQUE (DOT FRENCH), ACIDO FLUOROBÓRICO (DOT SPANISH), BOROFLUORIC ACID, FLUOBORIC ACID (HBF4), FLUOROBORIC ACID, HYDROGEN TETRAFLUOROBORATE, HYDROGEN TETRAFLUOROBORATE(1-), TETRAFLUOROBORIC ACID | |||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 87.82 | L | 1.84 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.30 | 3.3 | 20 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 0.084 | 0.92 | 5.6 |
Technical Basis
A review of available sources identified acute toxicity data (LD50, LDLo) 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 most preferred species and route toxicity, a rat oral LD50, was selected as the TEEL-3 basis. 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 = Rat oral LD50 (100 mg/kg)
This review generated PAC values inconsistent with Rev. 29A. The Rev. 29A TEEL-3 basis was a weight adjusted fluoride IDLH, while the current TEEL-3 is acute toxicity for fluoroboric acid. All available acute toxicity data evaluated support a more conservative TEEL-3 value. The Rev. 29A and current TEEL-2 use the same methodology with differences due to the change in TEEL-3. The Rev. 29A TEEL-1 basis was a weight adjusted fluoride TLV-TWA, while the current TEEL-1 was derived from the TEEL-2 (Table 3.5).
• PAC-1 = TEEL-1 = TEEL-2/11
• PAC-2 = TEEL-2 = TEEL-3/6
• PAC-3 = TEEL-3 = Rat oral LD50 (100 mg/kg)
This review generated PAC values inconsistent with Rev. 29A. The Rev. 29A TEEL-3 basis was a weight adjusted fluoride IDLH, while the current TEEL-3 is acute toxicity for fluoroboric acid. All available acute toxicity data evaluated support a more conservative TEEL-3 value. The Rev. 29A and current TEEL-2 use the same methodology with differences due to the change in TEEL-3. The Rev. 29A TEEL-1 basis was a weight adjusted fluoride TLV-TWA, while the current TEEL-1 was derived from the TEEL-2 (Table 3.5).
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Tetrafluoroboric-acid
Rat oral LD50. National Technical Information Service., OTS0570943. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Tetrafluoroboric-acid