(5-Ethoxy-2-formylphenyl)boronic acid CAS 1003042-89-4
| CAS No. | 1003042-89-4 |
| Molecular Formula | C9H11BO4 |
| Molecular Weight | 193.99 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 193.99 g/mol gives (5-Ethoxy-2-formylphenyl)boronic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
(5-Ethoxy-2-formylphenyl)boronic acid (CAS 1003042-89-4), molecular formula C9H11BO4 and molecular weight 193.99 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of (5-Ethoxy-2-formylphenyl)boronic acid (C9H11BO4) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C9H11BO4 |
| Molecular Weight | 193.99 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 4.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1988 |
Related Ethoxy Standards
- (2-Ethoxy-5-formylphenyl)boronic acid (CAS 1003042-92-9)
- (3-Ethoxy-5-formylphenyl)boronic acid (CAS 1072952-04-5)
- 4-Ethoxy-2-formylphenylboronic acid (CAS 1106867-72-4)
- (2-Ethoxy-6-formylphenyl)boronic acid (CAS 1364685-32-4)
- (2-Ethoxy-4-formylphenyl)boronic acid (CAS 2253871-63-3)
- (4-Ethoxy-3-formylphenyl)boronic acid (CAS 480424-63-3)
- (4-Ethoxy-2,5-dimethylphenyl)boronic acid (CAS 1217500-56-5)
- (4-Ethoxy-2,6-dimethylphenyl)boronic acid (CAS 1315342-15-4)
Recommended Standards
- (2-(2-Methoxy-2-oxoethyl)phenyl)boronic acid (CAS 1001108-67-3)
- 5-Bromo-2,3-difluoropyridine (CAS 89402-44-8)
- 2-Chloro-5-fluoro-3-pyridinecarbonyl chloride (CAS 1020849-13-1)
- 5-Bromo-1,3-oxazinane-2,4-dione (CAS 2767589-85-3)
- N,N'-(Butane-1,4-diyl)diformamide (CAS 50326-52-8)
- 2-Naphthalenecarboxylic acid, 8-(trifluoromethyl)-, ethyl ester (CAS 1092352-45-8)
- Bis(tetrabutylammonium) Bis(maleonitriledithiolato)nickel(II) Complex (CAS 18958-57-1)
- 2-(Bromomethyl)-5-methoxy-1,3,4-trimethyl-benzene 4-Methoxy-2,3,6-trimethylbenzyl Bromide 69877-88-9 (CAS 69877-88-9)
- Methyl (tert-butoxycarbonyl)tyrosinate (CAS 188576-13-8)
- Methyl 5-(p-tolyl)furan-2-carboxylate (CAS 52939-04-5)
- 5-(2-Methoxy-4-(((2-(tetrahydro-2H-pyran-4-yl)ethyl)amino)methyl)phenoxy)pyrazine-2-carboxamide (CAS 676500-67-7)
- 1-Methyl-2-oxocyclopentane-1-carbonitrile (CAS 66984-18-7)
- 1-(Hydroxymethyl)-1,2,3,4-tetrahydronaphthalene-1-carbonitrile (CAS 157736-48-6)
- Peptide 439 (CAS CATO-CPTD788439)
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