5,8-dichloro-3,4-dihydro-2H-1-benzopyran-4-one CAS 22406-36-6
| CAS No. | 22406-36-6 |
| Molecular Formula | C9H6Cl2O2 |
| Molecular Weight | 217.05 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5,8-dichloro-3,4-dihydro-2H-1-benzopyran-4-one (CAS 22406-36-6) is a high-purity analytical reference standard with the molecular formula C9H6Cl2O2 and a molecular weight of 217.05 g/mol.
5,8-dichloro-3,4-dihydro-2H-1-benzopyran-4-one (C9H6Cl2O2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. Halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
CATO manufactures 5,8-dichloro-3,4-dihydro-2H-1-benzopyran-4-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H6Cl2O2 |
| Molecular Weight | 217.05 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Halogen Content | Cl-containing |
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Recommended Standards
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- 6,8-Dichlorochroman-4-one (CAS 49660-60-8)
- Ethyllithium, typ. 8 % solution in Dibutyl Ether (typ. 1.7 M) 811-49-4 (CAS 811-49-4)
- (R)-6-methylchroman-4-amine hydrochloride (CAS 730980-47-9)
- 1-Methyl-2-oxoindoline-3-carbonyl chloride (CAS 67342-11-4)
- 4,6-Dibromochromane (CAS 1882373-48-9)
- 2-Hydroxy-5-(2-(pyrrolidine-3-carbonyl)phenyl)isonicotinic acid (CAS 1261892-42-5)
- 3-(aminomethyl)-1-methyl-1,2-dihydropyrazin-2-one dihydrochloride (CAS 2060060-78-6)
- n-(4-Ethoxyphenyl)tetrahydrothiophen-3-amine (CAS 1019617-48-1)
- (3S,5S)-5-(Hydroxymethyl)pyrrolidin-3-ol (CAS 108315-39-5)
- Methyl 6-amino-4-(2-chlorophenyl)-5-cyano-2-(((3-cyano-6-methylpyridin-2-yl)thio)methyl)-4H-pyran-3-carboxylate (CAS 387831-28-9)
- Semaglutide (CAS 910463-68-2)
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