Fluorescein-PEG6-NHS ester CAS 1818294-35-7

Description

Compared with other compounds in its class, the molecular weight of 839.86 g/mol gives Fluorescein-PEG6-NHS ester distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Fluorescein-PEG6-NHS ester (CAS 1818294-35-7), molecular formula C40H45N3O15S and molecular weight 839.86 g/mol, is a CATO reference standard with documented purity and traceability.

Based on its molecular formula C40H45N3O15S, Fluorescein-PEG6-NHS ester contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 839.86 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

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

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