4',5'-Dichloro-3',6'-dihydroxy-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one CAS 2320-96-9
| CAS No. | 2320-96-9 |
| Molecular Formula | C20H10Cl2O5 |
| Molecular Weight | 401.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4',5'-Dichloro-3',6'-dihydroxy-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one (C20H10Cl2O5) contains a flavonoid core, a hydroxyl group, an ether linkage, chlorine substitution. 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.
CATO supplies 4',5'-Dichloro-3',6'-dihydroxy-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one (CAS 2320-96-9), a certified reference material (molecular formula C20H10Cl2O5, MW 401.20 g/mol) for analytical method development and quality control.
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), 4',5'-Dichloro-3',6'-dihydroxy-3H-spiro[isobenzofuran-1,9'-xanthen]-3-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 | C20H10Cl2O5 |
| Molecular Weight | 401.20 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
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Recommended Standards
- 3-(1H-Indol-3-yl)-6-iodo-2-methylquinazolin-4(3H)-one (CAS 655250-50-3)
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- 1-(Tert-butyl) 6-methyl 3-iodo-1H-indole-1,6-dicarboxylate (CAS 850374-94-6)
- 2',7'-Dichlorofluorescein (CAS 76-54-0)
- 4-(Methylthio)-N-(pentan-2-yl)aniline (CAS 1019512-94-7)
- 3-Oxo-4-pyrrolidin-1-yl-butyric acid ethyl esterhydrochloride (CAS 1228070-76-5)
- (S)-2-(Benzo[b]thiophen-3-ylmethyl)-1-(tert-butoxycarbonyl)pyrrolidine-2-carboxylic acid (CAS 1217803-69-4)
- Fezolinetant Impurity 19 (CAS CATO-C4X-327019)
- N-Acetyl-3-(4-(p-methoxyphenyl)piperazinyl)azetidine (CAS 223381-95-1)
- 3-Nitro-4-(1-pyrazolyl)benzoic Acid (CAS 162848-25-1)
- Betahistine Impurity 19 (CAS 32635-81-7)
- 2-(4-Bromo-2,6-difluorophenyl)acetic acid (CAS 537033-54-8)
- Ethyl 6-bromo-4-oxo-1,4-dihydroquinoline-3-carboxylate (CAS 79607-23-1)
- Pancreatic Polypeptide (rat) (CAS 90419-12-8)
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