3,5-Dichloro-2,4-dihydroxy-benzoic acid CAS 59119-79-8
| CAS No. | 59119-79-8 |
| Molecular Formula | C7H4Cl2O4 |
| Molecular Weight | 223.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies 3,5-Dichloro-2,4-dihydroxy-benzoic acid (CAS 59119-79-8), a certified reference material (molecular formula C7H4Cl2O4, MW 223.01 g/mol) for analytical method development and quality control.
The molecular framework of 3,5-Dichloro-2,4-dihydroxy-benzoic acid (C7H4Cl2O4) is characterized by 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 polarity and ionization state of its functional 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.
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 | C7H4Cl2O4 |
| Molecular Weight | 223.01 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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.) | 1973 |
| Halogen Content | Cl-containing |
Related Dichloro Standards
- 2-(4,5-Dichloro-6-oxopyridazin-1(6H)-yl)acetic acid (CAS 107186-13-0)
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Recommended Standards
- 3-(Cyclopropylcarbamoyl)-2-fluorophenylboronic acid (CAS 2096353-44-3)
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- 3-Bromo-5-(difluoromethyl)phenol (CAS 770718-98-4)
- 1-Benzyl-3-iodo-1H-indazole (CAS 205643-28-3)
- N-(4-Aminophenyl)-4-(isopentyloxy)benzamide (CAS 1020054-04-9)
- 1-(3,4-Dichlorophenyl)-2-(phenylsulfonyl)ethan-1-one (CAS 344266-52-0)
- Lifibrate - API Standards (CAS 22204-91-7)
- 4-(4-(Dimethylamino)phenyl)butan-2-ol (CAS 120049-61-8)
- 4-(Azepan-1-ylmethyl)-5-methylthiophene-2-carbaldehyde (CAS 889973-25-5)
- Troxerutin Impurity 5 (CAS 125092-04-8)
- 1-(pyrrolidine-1-sulfonyl)propan-2-ol (CAS 1909313-56-9)
- N-(2-(3-(Thiophen-2-yl)acrylamido)phenyl)-2-(trifluoromethyl)benzamide (CAS 1203432-11-4)
- 3AEEA-Semaglutide(Endo-AEEA-Semaglutide) (CAS CATO-C4X-2226265)
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