(5R,6R)-3,4-Dichloro-5,6-dihydroxycyclohexa-1,3-dienecarboxylic acid CAS 205587-32-2
| CAS No. | 205587-32-2 |
| Molecular Formula | C7H6Cl2O4 |
| Molecular Weight | 225.03 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(5R,6R)-3,4-Dichloro-5,6-dihydroxycyclohexa-1,3-dienecarboxylic acid (CAS 205587-32-2), molecular formula C7H6Cl2O4 and molecular weight 225.03 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of (5R,6R)-3,4-Dichloro-5,6-dihydroxycyclohexa-1,3-dienecarboxylic acid (C7H6Cl2O4) 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. 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).
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.
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 | C7H6Cl2O4 |
| Molecular Weight | 225.03 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2015 |
| Halogen Content | Cl-containing |
Recommended Standards
- 4-Bromo-1-(2,2-difluoroethyl)-5-methyl-1H-pyrazole (CAS 1946828-50-7)
- 3-((2-Fluorophenyl)(hydroxy)boryl)benzonitrile (CAS 718642-07-0)
- 4-Bromo-3-(difluoromethyl)-1-ethyl-1H-pyrazole (CAS 1856095-62-9)
- 3-(Bromomethyl)-5-(difluoromethyl)-1-methyl-1H-pyrazole (CAS 2167461-71-2)
- (Z)-Tetradec-12-en-1-yl acetate (CAS 35153-20-9)
- 1-(3-Fluoro-4-methoxyphenyl)-1-propanone (CAS 586-22-1)
- Sulfosulfuron (CAS 141776-32-1)
- Sodium 2-hydroxy-2-(5-methylthiophen-2-yl)acetate (CAS 1354960-71-6)
- (3,5-Difluoro-4-((tetrahydro-2H-pyran-4-yl)oxy)phenyl)methanamine (CAS 1393330-71-6)
- Ethyl 2-acetyl-5-bromopentanoate (CAS 106447-94-3)
- 3-Acetyl-6,8-dibromo-2H-chromen-2-one (CAS 2199-92-0)
- 2-Bromo-6-chloro-4-(trifluoromethyl)aniline (CAS 109919-26-8)
- 4,4,5,5-tetramethyl-2-(4-(p-tolyloxy)phenyl)-1,3,2-dioxaborolane (CAS 1358754-78-5)
- Semaglutide impurity 331 (CAS CATO-C4X-2226231)
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