4-Chloro-2-hydroxybenzoyl chloride CAS 82944-13-6
| CAS No. | 82944-13-6 |
| Molecular Formula | C7H4Cl2O2 |
| Molecular Weight | 191.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C7H4Cl2O2, 4-Chloro-2-hydroxybenzoyl chloride contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 191.01 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
4-Chloro-2-hydroxybenzoyl chloride (CAS 82944-13-6), molecular formula C7H4Cl2O2 and molecular weight 191.01 g/mol, is a CATO reference standard with documented purity and traceability.
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.
As a certified reference material (CRM), 4-Chloro-2-hydroxybenzoyl chloride meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C7H4Cl2O2 |
| Molecular Weight | 191.01 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1980 |
| Halogen Content | Cl-containing |
Related Chloro Standards
- 5-Chloro-N-hydroxypicolinimidoyl chloride (CAS 1009562-96-2)
- 6-Chloro-2-methylpyrimidine-4-carbonyl chloride (CAS 136518-02-0)
- 5-Chloro-2-hydroxybenzoyl chloride (CAS 15216-81-6)
- 2-Chloro-4-methylpyrimidine-5-carbonyl chloride (CAS 188781-13-7)
- 2-Chloro-4-hydroxybenzoyl chloride (CAS 535962-35-7)
- 2-Chloro-6-methylpyrimidine-4-carbonyl chloride (CAS 306960-81-6)
- 4-Chloro-3-hydroxybenzoyl chloride (CAS 888731-75-7)
- 3-Chloro-4-hydroxybenzoyl chloride (CAS 59595-94-7)
Recommended Standards
- 4,6-Dichloropicolinamide (CAS 98141-39-0)
- 4,6-Dichloronicotinamide (CAS 70593-57-6)
- 4-Chlorophenyl chloroformate (CAS 7693-45-0)
- 4,5-Dichlorosalicylaldehyde (CAS 84388-68-1)
- Ruscogenin (CAS 472-11-7)
- 6-Amino-N-β-D-glucopyranosylhexanamide (CAS 83387-51-3)
- 4-(3,4-Dimethylphenoxy)butan-1-ol (CAS 1156068-58-4)
- Tert-butyl 6-fluoroindoline-1-carboxylate (CAS 1065183-64-3)
- (2-Bromo-4-fluorophenyl)boronic acid (CAS 1217501-12-6)
- 4-(2-(4-(Methylthio)phenyl)acetyl)-3,4-dihydroquinoxalin-2(1H)-one (CAS 952835-99-3)
- Methyl 2,3-diamino-6-fluorobenzoate (CAS 403712-67-4)
- (2-(6-(Ethylthio)pyridin-3-yl)pyrrolidin-1-yl)(phenyl)methanone (CAS 1352493-75-4)
- Ethyl 3-bromo-4-iodobenzoate (CAS 386267-31-8)
- Biotinyl-Glucagon (1-29) (human, rat, porcine) trifluoroacetate salt (CAS 1802086-28-7)
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