Fluorescein Dimer Impurity 3 (isomeric mixture) CAS CATO-C4X-290011
| CAS No. | CATO-C4X-290011 |
| Molecular Formula | C46H26O10 |
| Molecular Weight | 738.69 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Fluorescein Dimer Impurity 3 (isomeric mixture) 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.
CATO supplies Fluorescein Dimer Impurity 3 (isomeric mixture) (CAS CATO-C4X-290011), a pharmacopoeial impurity reference standard (molecular formula C46H26O10, MW 738.69 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system, Fluorescein Dimer Impurity 3 (isomeric mixture) is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 738.69 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
Physical & Chemical Properties
| Molecular Formula | C46H26O10 |
| Molecular Weight | 738.69 g/mol |
| Purity | >80% |
| 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) | 34.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Fluorescein Standards
- Fluorescein-thiourea-PEG6-acid (CAS 2055014-69-0)
- Fluorescein-PEG5-acid (CAS 2183440-40-4)
- Fluorescein-6-carbonyl-Val-Ala-DL-Asp(OMe)-fluoromethylketone (N-1915.0500) (CAS 560094-66-8)
- Fluorescein-PEG3-NH-Boc (CAS 1807534-77-5)
- Fluorescein-PEG5-NHS ester (CAS 2353409-62-6)
- Fluorescein-DBCO (CAS 2054339-00-1)
- Fluorescein di-β-D-glucopyranoside (CAS 129787-66-2)
- Fluorescein di-β-D-galactopyranoside (CAS 17817-20-8)
Recommended Standards
- Cariprazine Impurity 7 (CAS 2450971-05-6)
- 5-O-DMT-5-[N-(2-(trifluoroacetamido)ethyl)-3-E-acrylamido]-2-deoxyuridine (CAS 153512-23-3)
- 2,2'-(9,9-Bis(4-hexylphenyl)-9H-fluorene-2,7-diyl)bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolane) (CAS 1206875-64-0)
- Ligupurpuroside C (CAS 1194056-33-1)
- Propofol Impurity 48 (CAS CATO-C4X-147348)
- Vonoprazan Impurity 270 (CAS CATO-C4X-1020270)
- Empagliflozin Impurity 77 (CAS 2137418-13-2)
- 3-(Hydroxymethyl)-1H-pyrazol-5-ol (CAS 70498-81-6)
- N-(2-Piperidin-1-ylethyl)piperidine-4-carboxamide (CAS 92031-42-0)
- [5-(4-Bromo-phenyl)-4H-[1,2,4]triazol-3-yl]-acetic acid hydrochloride (CAS 1187933-01-2)
- 3-Amino-1-methyl-1H-pyrazole-5-carboxylic acid hydrochloride (CAS 1197237-72-1)
- Valganciclovir Impurity 23 (CAS CATO-C4X-177423)
- 5-(4-Bromophenyl)-5-oxopentanoic acid (CAS 35333-26-7)
- Semaglutide Impurity 148 (CAS CATO-C4X-2226148)
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