6,7-Dichloro-4-oxo-4H-chromene-3-carbaldehyde CAS 64481-11-4
| CAS No. | 64481-11-4 |
| Molecular Formula | C10H4Cl2O3 |
| Molecular Weight | 243.04 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
6,7-Dichloro-4-oxo-4H-chromene-3-carbaldehyde (CAS 64481-11-4), molecular formula C10H4Cl2O3 and molecular weight 243.04 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 6,7-Dichloro-4-oxo-4H-chromene-3-carbaldehyde is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 243.04 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.
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 | C10H4Cl2O3 |
| Molecular Weight | 243.04 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1975 |
| Halogen Content | Cl-containing |
Related Dichloro Standards
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- 3,4-Dichloro-2-(difluoromethoxy)benzyl alcohol (CAS 1803714-02-4)
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Recommended Standards
- 5-Iodoindolizine (CAS 2206741-99-1)
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- 5-Iodo-2-methylbenzonitrile (CAS 52107-68-3)
- E5112AA0T0 6306-39-4 1,2-Dichloro-4,5-dinitrobenzene Benzene, 1,2-dichloro-4,5-dinitro- 4-05-00-00747 (Beilstein Handbook Reference) AI3-19504 BRN 2460868 4,5-Dichloro-1,2-dinitrobenzene NSC 22945 Parazol UNII-E5112AA0T0 (CAS 6306-39-4)
- 4-Bromo-N-(2,5-dimethoxyphenyl)benzamide (CAS 21353-80-0)
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- Trifluridine Impurity 11 (CAS CATO-C4X-205611)
- 2-(5-(2-Nitrophenyl)-1,3,4-oxadiazol-2-yl)benzoic acid (CAS 56894-42-9)
- N-(4-(((4-(2,4-Dimethylphenyl)-5-(pyridin-3-yl)-4H-1,2,4-triazol-3-yl)thio)methyl)-2-oxo-2H-chromen-7-yl)acetamide (CAS 733788-35-7)
- 1-Methyl-3-(1,3-oxazol-2-yl)-1H-pyrazole-5-carboxylic acid (CAS 2091447-00-4)
- (E)-N'-(2-fluorophenyl)-3-(quinolin-3-yl)acrylohydrazide (CAS 478039-64-4)
- 4-Chloro-2-(difluoromethyl)phenol (CAS 1261647-92-0)
- Semaglutide impurity 32 (CAS CATO-C4X-222632)
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