4-Boronophthalic acid CAS 1072946-35-0
| CAS No. | 1072946-35-0 |
| Molecular Formula | C8H7BO6 |
| Molecular Weight | 209.95 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-Boronophthalic acid (CAS 1072946-35-0), molecular formula C8H7BO6 and molecular weight 209.95 g/mol, is a CATO reference standard with documented purity and traceability.
4-Boronophthalic acid (C8H7BO6) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C8H7BO6 |
| Molecular Weight | 209.95 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1988 |
Recommended Standards
- (3-Carbamoyl-5-nitrophenyl)boronic acid (CAS 102170-51-4)
- 2-Boronoterephthalic acid (CAS 1351221-58-3)
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- 3,5-Dicarboxyphenylboronic Acid (CAS 881302-73-4)
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- β,3-Dimethylbenzenepropanoic acid (CAS 19355-29-4)
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- 2-(4-Methoxyphenyl)-4-(piperidin-1-yl)quinoline (CAS 853331-11-0)
- 1H-Pyrazole-3-acetic acid, 1-(2-chlorophenyl)-4-[[3-(dimethylamino)phenyl](methylamino)methylene]-4,5-dihydro-5-oxo-, methyl ester (CAS 1640998-04-4)
- Semaglutide impurity 249 (CAS CATO-C4X-2226249)
Why CATO?
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