CAS Registry Number

CAS 518-47-8 — Fluorescein disodium salt (insoluble, 50-53% dye content)

Fluorescein disodium salt (insoluble, 50–53% dye content) is a fluorescent dye used in biological staining, diagnostic assays, and tracer studies. It exhibits strong green fluorescence when excited by blue light. Available in powder form with a molecular formula of C20H10Na2O5, molecular weight of 376.28 g/mol, and CAS number 518-47-8. Stable at ambient temperature and suitable for applications requiring high purity and consistent performance. Molekula supplies Fluorescein disodium salt (insoluble, 50–53% dye content) from research to bulk quantities with full documentation and ISO 9001:2015 traceability.

Also known as: Fluorescein disodium salt (soluble, 40-50% dye content) · Fluorescein Sodium Salt 20% solution