4,5-Dichloro-2,3-dihydroxybenzonitrile CAS 73275-91-9
| CAS No. | 73275-91-9 |
| Molecular Formula | C7H3Cl2NO2 |
| Molecular Weight | 204.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4,5-Dichloro-2,3-dihydroxybenzonitrile (CAS 73275-91-9), a certified reference material (molecular formula C7H3Cl2NO2, MW 204.01 g/mol) for analytical method development and quality control.
The molecular framework of 4,5-Dichloro-2,3-dihydroxybenzonitrile (C7H3Cl2NO2) is characterized by an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C7H3Cl2NO2 |
| Molecular Weight | 204.01 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Dichloro Standards
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Recommended Standards
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- 2-(4-Aminopiperidin-1-yl)cyclopentan-1-ol (CAS 1184385-01-0)
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- 3-ethynyl-3-methyl-azetidine (CAS 2168144-68-9)
- 4-[(3-amino-1h-pyrazol-1-yl)methyl]benzoic acid (CAS 1006348-84-0)
- (-)-Slaframine (CAS 20084-93-9)
- C22H23N5S2Se (CAS 2244940-88-1)
- 4-(4-Nitrophenoxy)phthalic acid (CAS 26190-11-4)
- 5-Ethylpyrimidin-4-ol (CAS 25198-98-5)
- Hexapeptide-11 (CAS 100684-36-4)
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