Fluorescein impurity 14 CAS CATO-C4X-290014
| CAS No. | CATO-C4X-290014 |
| Molecular Formula | C32H20O7 |
| Molecular Weight | 516.50 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Fluorescein impurity 14 (CAS CATO-C4X-290014) is a certified pharmaceutical impurity reference standard with the molecular formula C32H20O7 and a molecular weight of 516.50 g/mol.
Structurally, Fluorescein impurity 14 (C32H20O7) contains a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system. The molecule exhibits a degree of unsaturation (DBE) of 23.0, corresponding to approximately 23 ring(s) or double-bond equivalent(s). With a molecular weight of 516.50 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 14 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 | C32H20O7 |
| Molecular Weight | 516.50 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 23.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Fluorescein Standards
- Fluorescein Glucuronide (CAS 74804-84-5)
- Fluorescein mono-β-D-galactopyranoside (CAS 102286-67-9)
- Fluorescein impurity 01 (CAS 76579-17-4)
- 6-(Fluorescein-5-carboxamido)hexanoic Acid (CAS 194661-60-4)
- Fluorescein-diacetate-5-isothiocyanate (CAS 118378-76-0)
- Fluorescein diacetate 6-isothiocyanate (CAS 890090-49-0)
- Fluorescein Dibutyrate (CAS 7298-65-9)
- Fluorescein-thiourea-PEG2-azide (CAS 1146195-72-3)
Recommended Standards
- Nitrocefin (>90%) (see C4X-2648) (CAS 41906-86-9)
- N-Nitroso Pemigatinib (CAS CATO-C4X-30242)
- Naphthofluorescein diacetate (CAS 77084-71-0)
- (2Z)-2-[(3,4-Dimethoxyphenyl)methylidene]-3-phenyl-7-[3-(trifluoromethyl)phenoxy]-2,3-dihydro-1H-inden-1-one (CAS 337921-81-0)
- Ethambutol EP Impurity B (2R,2’S-Ethambutol) DiHCl (CAS 32454-69-6)
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- 6,7-Dimethoxy-1-methyl-1,4-dihydroindeno[1,2-c]pyrazole-3-carboxylic acid (CAS 1146292-94-5)
- (Pro3)-Gastric Inhibitory Polypeptide (human) trifluoroacetate salt (CAS 299898-52-5)
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