Fluorescein-PEG5-acid CAS 2183440-40-4
| CAS No. | 2183440-40-4 |
| Molecular Formula | C34H38N2O12S |
| Molecular Weight | 698.74 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies Fluorescein-PEG5-acid (CAS 2183440-40-4), a certified reference material (molecular formula C34H38N2O12S, MW 698.74 g/mol) for analytical method development and quality control.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, Fluorescein-PEG5-acid is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 698.74 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).
CATO manufactures Fluorescein-PEG5-acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C34H38N2O12S |
| Molecular Weight | 698.74 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1998 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Fluorescein Standards
- 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-DBCO (CAS 2054339-00-1)
- Fluorescein Dimer Impurity 3 (isomeric mixture) (CAS CATO-C4X-290011)
- Fluorescein di-β-D-glucopyranoside (CAS 129787-66-2)
- Fluorescein di-β-D-galactopyranoside (CAS 17817-20-8)
- Fluorescein-thiourea-PEG6-acid (CAS 2055014-69-0)
- Fluorescein-PEG4-acid (CAS 1807518-76-8)
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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