4,5-Dichloro-2-methylmandelic acid CAS 1806284-45-6
| CAS No. | 1806284-45-6 |
| Molecular Formula | C9H8Cl2O3 |
| Molecular Weight | 235.06 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.
4,5-Dichloro-2-methylmandelic acid (CAS 1806284-45-6) is a high-purity analytical reference standard with the molecular formula C9H8Cl2O3 and a molecular weight of 235.06 g/mol.
Based on its molecular formula C9H8Cl2O3, 4,5-Dichloro-2-methylmandelic acid 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 235.06 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), 4,5-Dichloro-2-methylmandelic 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.
Physical & Chemical Properties
| Molecular Formula | C9H8Cl2O3 |
| Molecular Weight | 235.06 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 |
| 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.) | 1995 |
| Halogen Content | Cl-containing |
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Recommended Standards
- 2,5-Dichloro-3-methylmandelic acid (CAS 1806284-10-5)
- 2,6-Dichloro-3-methylmandelic acid (CAS 1806304-37-9)
- Ethyl 3,6-dichloro-2-hydroxybenzoate (CAS 1805224-98-9)
- 2,5-Dichloro-4-methylmandelic acid (CAS 1806347-56-7)
- 2-Amino-6-methyl-4,5,6,7-tetrahydro-benzo[b]thiophene-3-carboxylic acid amide (CAS 95211-68-0)
- tert-Butyl 3-amino-2-(hydroxymethyl)piperidine-1-carboxylate (CAS 2089706-35-2)
- (2E)-2-[(4-Chlorophenyl)methylidene]-4,4-dimethyl-3-oxopentanenitrile (CAS 958266-54-1)
- 16-(2H-tetrazol-5-yl)hexadecanoic Acid (CAS 873874-15-8)
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- 5-Fluoro-2-(1-methyl-2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione (CAS 2230957-36-3)
- tert-Butyl ((1S,2R)-2-hydroxy-1,2-diphenylethyl)carbamate (CAS 813459-59-5)
- 5-(Trifluoromethyl)nicotinic Acid (CAS 131747-40-5)
- Peptide Impurity 27 (CAS 1350456-68-6)
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