1-(2-Chloro-3,4-dihydroxyphenyl)ethan-1-one CAS 56961-48-9
| CAS No. | 56961-48-9 |
| Molecular Formula | C8H7ClO3 |
| Molecular Weight | 186.59 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1-(2-Chloro-3,4-dihydroxyphenyl)ethan-1-one (CAS 56961-48-9) is a high-purity analytical reference standard with the molecular formula C8H7ClO3 and a molecular weight of 186.59 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 1-(2-Chloro-3,4-dihydroxyphenyl)ethan-1-one is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 186.59 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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), 1-(2-Chloro-3,4-dihydroxyphenyl)ethan-1-one 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 | C8H7ClO3 |
| Molecular Weight | 186.59 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°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.) | 1973 |
| Halogen Content | Cl-containing |
Related Chloro Standards
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Recommended Standards
- (S)-2-(4-Chlorophenyl)-2-hydroxyacetic Acid (CAS 76496-63-4)
- 1-(3-Chloro-2,6-dihydroxyphenyl)ethan-1-one (CAS 87953-93-3)
- (S)-2-(3-Chlorophenyl)-2-hydroxyacetic acid (CAS 32222-43-8)
- 1-(5-Chloro-2,4-dihydroxyphenyl)ethan-1-one (CAS 90110-32-0)
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