2-Bromo-3-hydroxybenzoic acid CAS 91658-91-2
| CAS No. | 91658-91-2 |
| Molecular Formula | C7H5BrO3 |
| Molecular Weight | 217.02 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 2-Bromo-3-hydroxybenzoic acid is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
2-Bromo-3-hydroxybenzoic acid (CAS 91658-91-2) is a high-purity analytical reference standard with the molecular formula C7H5BrO3 and a molecular weight of 217.02 g/mol.
2-Bromo-3-hydroxybenzoic acid (C7H5BrO3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 | C7H5BrO3 |
| Molecular Weight | 217.02 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1983 |
| Halogen Content | Br-containing |
Related Bromo Standards
- 3-Bromo-6,7-dihydro-[1,4]dioxino[2,3-c]pyridazine (CAS 1003944-31-7)
- 6-Bromo-2H-oxazolo[3,2-a]pyrimidin-7(3H)-one (CAS 103022-66-8)
- 2-Bromo-5-nitroaniline (CAS 10403-47-1)
- (E)-3-(5-Bromo-2-furanyl)acrylic Acid (CAS 111252-31-4)
- 5-Bromo-2-pyrimidinylacetic Acid (CAS 1134327-93-7)
- 5-Bromo-3-methyl-2-nitropyridine (CAS 114042-02-3)
- 5-Bromo-2,4-dihydroxybenzaldehyde (CAS 116096-90-3)
- 5-Bromo-4-methyl-2-nitropyridine (CAS 1225278-70-5)
Recommended Standards
- 2-Bromo-3,6-dihydroxybenzaldehyde (CAS 241127-72-0)
- 2-Bromo-3-methyl-4-nitropyridine (CAS 79055-55-3)
- 2-Bromo-3,4-dihydroxybenzaldehyde (CAS 4815-97-8)
- 2-Bromo-3-methyl-5-nitropyridine (CAS 23132-21-0)
- 5-ethynyl-1H-pyrazolo[4,3-b]pyridine (CAS 1374652-56-8)
- 3-(4-Fluorophenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine hydrochloride (CAS 733757-82-9)
- Pentalenolactone O (CAS 93361-64-9)
- (S)-2-Amino-N-(4-bromobenzyl)-N-cyclopropyl-3-methylbutanamide (CAS 1354018-32-8)
- 1-chloro-8-methylpyrrolo[1,2-a]pyrazine (CAS 1613023-03-2)
- (E)-3,7,11-Trimethyldodeca-6,10-dien-1-ol (CAS 51411-24-6)
- Axitinib Impurity 65 (CAS CATO-C4X-107165)
- N1-Isopropyl-N5-(6-methoxy-8-quinolyl)-1,5-pentanediamine (CAS 86-78-2)
- 2-[[4-[[4-[(2,4-Diaminopteridin-6-ylMethyl-Methylamino]Benzoyl]Amino]-2-Fluoro-5-Hydroxy-5-Oxopentanoyl]Amino]Pentanedioic Acid (CAS 124716-15-0)
- Semaglutide Impurity 165 (CAS CATO-C4X-2226165)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com