PAC Database - Detailed Chemical Data
Chemical Identity
| Chemical | CAS# | UN# | Health Code Numbers | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sodium metaborate | 7775-19-1 |
15.01
11.01
15.02
4.08
4.05
7.01
8.00
4.09
4.06
4.10
|
||||||||||
| Formula | Synonyms | |||||||||||
| Na-B-H-O2 | ||||||||||||
Physical Properties
| Mol Wt | State | MP (°C) | BP (°C) | VP (Hg) | VP (°C) | SG | LEL (ppm) |
|---|---|---|---|---|---|---|---|
| 66.81 | S | 966 | 1434 | 2.36 |
PAC Values
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 7.0 | 77 | 460 |
| PAC-1 | PAC-2 | PAC-3 |
|---|---|---|
| 2.6 | 28 | 170 |
Technical Basis
A review of limited sources identified a rat oral LD50 that was evaluated using factors in Tables 3.2, 3.3, and 3.4. 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 (2330 mg/kg)
This review generated PAC-3 and PAC-2 values consistent with Rev. 29A, and a PAC-1 value inconsistent with Rev. 29A. The Rev. 29A TEEL-1 basis is a weight adjusted TLV-STEL, reportedly for "inorganic borate compounds“; analysts determined this value is restricted to specific borates containing BO3, BO4 and BO5, and is not applicable to general inorganic borate compounds. Instead, analysts derived the TEEL-1 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 (2330 mg/kg)
This review generated PAC-3 and PAC-2 values consistent with Rev. 29A, and a PAC-1 value inconsistent with Rev. 29A. The Rev. 29A TEEL-1 basis is a weight adjusted TLV-STEL, reportedly for "inorganic borate compounds“; analysts determined this value is restricted to specific borates containing BO3, BO4 and BO5, and is not applicable to general inorganic borate compounds. Instead, analysts derived the TEEL-1 from the TEEL-2 (Table 3.5).
References
Chemical information: https://pubchem.ncbi.nlm.nih.gov/compound/Sodium-metaborate
Rat LD50. Pesticide Manual., 9(88), 1991. Retrieved from: https://pubchem.ncbi.nlm.nih.gov/compound/Sodium-metaborate