5-Chloro-2-methylbenzeneboronic Acid CAS 148839-33-2
| CAS No. | 148839-33-2 |
| Molecular Formula | C7H8BClO2 |
| Molecular Weight | 170.40 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 5-Chloro-2-methylbenzeneboronic Acid.
5-Chloro-2-methylbenzeneboronic Acid (CAS 148839-33-2), molecular formula C7H8BClO2 and molecular weight 170.40 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C7H8BClO2, 5-Chloro-2-methylbenzeneboronic Acid contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 170.40 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C7H8BClO2 |
| Molecular Weight | 170.40 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.5 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1999 |
| Halogen Content | Cl-containing |
Related Chloro Standards
- 2-Chloro-4-methylphenylboronic Acid (CAS 145349-62-8)
- 4-Chloro-3-methylphenylboronic Acid (CAS 161950-10-3)
- 3-Chloro-4-methylphenylboronic Acid (CAS 175883-63-3)
- 2-Chloro-5-methylphenylboronic Acid (CAS 193353-35-4)
- (2-Chloro-3-methylphenyl)boronic acid (CAS 915070-53-0)
- (2-chloro-6-methylphenyl)boronic acid (CAS 851756-51-9)
- 3-Chloro-2-methylphenylboronic Acid (CAS 313545-20-9)
- 3-Chloro-5-methylphenylboronic Acid (CAS 913836-14-3)
Recommended Standards
- Bis(trimethylsilyl)acetylene (CAS 14630-40-1)
- (4-(Chloromethyl)phenyl)boronic acid (CAS 164413-77-8)
- Divinyltetramethyldisilane (CAS 1450-29-9)
- [(2-Chlorophenyl)methyl]boronic acid (CAS 1350512-46-7)
- 2-(2-(2-Aminoethoxy)ethoxy)acetic acid (CAS 134978-97-5)
- 4-Methyl-2-nitropyridine-1-oxide (CAS 100047-40-3)
- 8-Bromo-7-fluoroquinolin-2(1H)-one (CAS 1001322-86-6)
- 1-(1H-pyrazol-3-yl)ethan-1-one (CAS 20583-33-9)
- 1-Amino-2-(2-(2-bromophenoxy)ethoxy)-4-hydroxyanthracene-9,10-dione (CAS 72953-52-7)
- N-[2-Fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]pyrimidine-4-carboxamide (CAS 2246677-13-2)
- 8-Ethoxy-1,2,3,5,6,7-hexahydropyrido[3,2,1-ij]quinoline (CAS 182056-26-4)
- N-(4-(4-(2-Ethoxyphenyl)-5-mercapto-4H-1,2,4-triazol-3-yl)phenyl)methanesulfonamide (CAS 917747-31-0)
- Cefamandole Adipic Acid Impurity (CAS CATO-C4X-122128)
- Neuropeptide Y (3-36) (human, rat) trifluoroacetate salt (CAS 150138-78-6)
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