https://axispharm.com/product/apdye-647-nhs-ester/ Catalog #: AP12453 Name: APDye Fluor 647 NHS Ester Chemical Formula: C40H46N3Na3O16S4 Molecular Alexa Fluor 647 Molecular Weight: 1022 CAS: 407627-60-5 Solubility: Water, DMSO, DMF Abs/Em Maxima: 649/671 nm Extinction coefficient: 270,000 cm-1M-1 Spectrally similar dyes: Cy5, DyLight® 649, Purity: ≥95% Availability: In StockAll Rights Reserved