4-Chloro-3-hydroxybenzoic Acid CAS 34113-69-4
| CAS No. | 34113-69-4 |
| Molecular Formula | C7H5ClO3 |
| Molecular Weight | 172.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4-Chloro-3-hydroxybenzoic Acid 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.
CATO supplies 4-Chloro-3-hydroxybenzoic Acid (CAS 34113-69-4), a certified reference material (molecular formula C7H5ClO3, MW 172.57 g/mol) for analytical method development and quality control.
4-Chloro-3-hydroxybenzoic Acid (C7H5ClO3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine 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.
Physical & Chemical Properties
| Molecular Formula | C7H5ClO3 |
| Molecular Weight | 172.57 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°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.) | 1966 |
| Halogen Content | Cl-containing |
Related Chloro Standards
- 3-Chloro-5-methyl-2-nitropyridine (CAS 1210909-07-1)
- 6-Chloro-3-methyl-2-nitropyridine (CAS 1211516-41-4)
- 6-Chloro-5-methyl-3-pyridazinecarboxylic acid (CAS 1211516-60-7)
- 6-Chloro-N-hydroxypyridine-2-carboxamide (CAS 125309-38-8)
- Methyl 5-chloro-3-pyridazinecarboxylate (CAS 1256786-31-8)
- 6-Chloro-N-hydroxynicotinamide (CAS 1263094-64-9)
- 5-Chloro-N-hydroxypicolinamide (CAS 1289026-43-2)
- 6-Chloro-2-methylpyrimidine-4-carboxylic acid (CAS 136518-06-4)
Recommended Standards
- 3-Chloro-4-Nitroaniline (CAS 825-41-2)
- 2-Chloro-5-methyl-4-nitropyridine (CAS 97944-45-1)
- 4-Chloro-2-Nitroaniline (CAS 89-63-4)
- 4-Amino-6-chloropicolinic acid (CAS 546141-56-4)
- 4-[(3-Chlorobenzyl)oxy]benzoyl chloride (CAS 1160250-21-4)
- 1-Cyclopentyl-3-(trifluoromethyl)pyrazole-4-boronic acid (CAS 2304634-13-5)
- 1-(6-(tert-Butyl)pyridin-3-yl)ethan-1-one (CAS 56029-46-0)
- 8-Bromo-1,7-naphthyridine (CAS 63845-72-7)
- 2-Hydroxy-4-(3-methylbutanamido)benzoic acid (CAS 100391-79-5)
- n-(2-(Piperidin-1-yl)ethyl)cyclopentanamine (CAS 1184741-03-4)
- 3,3,3-trifluoro-2-(trifluoromethyl)propanoic acid 3,3,3-tris(fluoranyl)-2-(trifluoromethyl)propanoic acid 564-10-3 A831037 (CAS 564-10-3)
- n-Hexyltetrahydro-2h-thiopyran-3-amine (CAS 1343120-01-3)
- 352546-68-0 Europium(III) tris(1,3-diphenyl-1,3-propanedionato) mono(5-amino-1,10-phenanthroline) Tris(dibenzoylmethane) mono(5-amino-1,10-phenanthroline)europium (lll) (CAS 352546-68-0)
- Hexapeptide-9 (CAS 1228371-11-6)
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