4-Chloro-3-hydroxybenzoyl chloride CAS 888731-75-7
| CAS No. | 888731-75-7 |
| Molecular Formula | C7H4Cl2O2 |
| Molecular Weight | 191.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 191.01 g/mol gives 4-Chloro-3-hydroxybenzoyl chloride distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 4-Chloro-3-hydroxybenzoyl chloride (CAS 888731-75-7), a certified reference material (molecular formula C7H4Cl2O2, MW 191.01 g/mol) for analytical method development and quality control.
Based on its molecular formula C7H4Cl2O2, 4-Chloro-3-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. 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.
As a certified reference material (CRM), 4-Chloro-3-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.) | 1987 |
| 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-2-hydroxybenzoyl chloride (CAS 82944-13-6)
- 3-Chloro-4-hydroxybenzoyl chloride (CAS 59595-94-7)
Recommended Standards
- 4-Chlorophenyl chloroformate (CAS 7693-45-0)
- 4,6-Dichloropicolinamide (CAS 98141-39-0)
- 5,6-Dichlorobenzo[d][1,3]dioxole (CAS 6120-31-6)
- 4,6-Dichloronicotinamide (CAS 70593-57-6)
- 4-Oxo-1(4H)-cinnolinepropanoic acid (CAS 4320-73-4)
- Methyl 8-(benzyloxy)-4-(2-hydroxyethyl)-2-naphthoate (CAS 144003-49-6)
- 8-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)isoquinolin-6-ol (CAS 2768872-07-5)
- 2-(Azepan-1-yl)-2-phenylacetic acid (CAS 897446-11-6)
- (2-Nitroethyl)cyclobutane (CAS 1036931-21-1)
- 5-Chloro-1-methyl-1H-pyrazolo[3,4-b]pyridin-4(7H)-one (CAS 1602896-54-7)
- 1-(tert-Butoxycarbonyl)cyclopent-3-ene-1-carboxylic acid (CAS 635318-61-5)
- 2-Bromo-5-methoxy-4-methylphenol (CAS 99768-19-1)
- Ethyl [1,3]dioxolo[4,5-b]pyridine-6-carboxylate (CAS 76470-36-5)
- Tau Peptide (74-102) (Exon 3/Insert 2 Domain) trifluoroacetate salt (CAS 1322695-34-0)
Why CATO?
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