2＇,7＇-Dichlorodihydrofluorescein Diacetate CAS 4091-99-0
| CAS No. | 4091-99-0 |
| Molecular Formula | C24H16Cl2O7 |
| Molecular Weight | 487.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 2＇,7＇-Dichlorodihydrofluorescein Diacetate is closely related to a flavonoid core, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 2＇,7＇-Dichlorodihydrofluorescein Diacetate (CAS 4091-99-0), a certified reference material (molecular formula C24H16Cl2O7, MW 487.29 g/mol) for analytical method development and quality control.
The molecular framework of 2＇,7＇-Dichlorodihydrofluorescein Diacetate (C24H16Cl2O7) is characterized by a flavonoid core, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C24H16Cl2O7 |
| Molecular Weight | 487.29 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
Recommended Standards
- Sitagliptin Impurity 25 (CAS CATO-C4X-114425)
- (4-(4-Iodophenyl)-1,1-dioxido-4H-benzo[b][1,4]thiazin-2-yl)(phenyl)methanone (CAS 1114886-20-2)
- 5-(Dimethylamino)pyrimidine-2,4(1H,3H)-dione (CAS 37454-51-6)
- 5-(3,4-Dichlorophenyl)-4-(3-fluoro-4-methoxybenzoyl)-3-hydroxy-1-(pyridin-3-ylmethyl)-1H-pyrrol-2(5H)-one (CAS 609793-47-7)
- 7,7-Bis(Pentafluoroethyl)-1,3,5-Cycloheptatriene (CAS 17838-67-4)
- Rizatriptan Dimer (CAS 1135479-44-5)
- Tetracaine Impurity 3 (CAS 2169-41-7)
- 2-(4-Fluorophenyl)-5-methyloxazole-4-carboxylic acid (CAS 61152-03-2)
- 3-(methoxymethyl)oxolane-3-carboxylic acid (CAS 1566654-21-4)
- 4-(Aminomethyl)-1-benzyl-1,2,3,6-tetrahydropyridine (CAS 153196-51-1)
- (2-Methoxyphenyl)hydrazine xhydrochloride (CAS 57396-67-5)
- 3-Bromo-2-(propan-2-ylsulfanyl)-5-(trifluoromethyl)pyridine (CAS 1881328-03-5)
- 6-(2,4-Dichlorophenyl)-2-methyl-4-pyrimidinol (CAS 178430-10-9)
- Liraglutide(14-22)TFA Salt (CAS CATO-C4X-199212)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com