Fluorescein Impurity 10 CAS CATO-C4X-290010
| CAS No. | CATO-C4X-290010 |
| Molecular Formula | C20H14O8S |
| Molecular Weight | 414.39 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Fluorescein Impurity 10 is closely related to a flavonoid core, a sulfone group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies Fluorescein Impurity 10 (CAS CATO-C4X-290010), a pharmacopoeial impurity reference standard (molecular formula C20H14O8S, MW 414.39 g/mol) used for the identification and quantification of trace impurities in APIs.
Fluorescein Impurity 10 (C20H14O8S) contains a flavonoid core, a sulfone group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Fluorescein Impurity 10 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 | C20H14O8S |
| Molecular Weight | 414.39 g/mol |
| Purity | >90% |
| 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 |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Sulfur Atoms | 1 |
Related Fluorescein Standards
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- Fluorescein-O'-acetic Acid (CAS 233759-98-3)
Recommended Standards
- 6-(Pyridin-3-yl)quinolin-2(1H)-one (CAS 99470-74-3)
- Pyrazosulfuron-Ethyl (CAS 93697-74-6)
- 2-(5-Nitrofuran-2-yl)-N-(triphenylphosphoranylidene)ethenamine (CAS 84839-43-0)
- p-Vinylphenyl O-[beta-D-apiofuranosyl-(1-6)]-beta-D-glucopyranoside (CAS 112047-91-3)
- Formoterol Impurity 24 (CAS 49861-92-9)
- Brivaracetam impurity 86 (CAS CATO-C4X-200786)
- Formoterol impurity 134 (CAS CATO-C4X-1525134)
- 2-[N-(2-methylphenyl)methanesulfonamido]acetic acid (CAS 362695-40-7)
- Ametryn Impurity 4 (CAS 30358-19-1)
- 4-Cyclopropoxy-2-ethyl-1-nitrobenzene (CAS 1243482-16-7)
- 5,9-Dithia-1,7-diazatricyclo[6.3.0.0,2,6]undeca-2(6),3,7,10-tetraene-4-carboxylic acid (CAS 874787-48-1)
- 1-Benzyl 2-(tert-butyl) pyrazolidine-1,2-dicarboxylate (CAS 57699-89-5)
- Rebamipide Impurity 14 (CAS 619-56-7)
- Semaglutide impurity 77 (CAS CATO-C4X-222677)
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