CAS 956579-01-4 appears in our catalog under these names: 800CW NHS ester, 800CW NHS ester 90%, Sodium 2-(2-(3-(2-(3,3-dimethyl-5-sulfonato-1-(4-sulfonatobutyl)indolin-2-ylidene)ethylidene)-2-(4-sulfonatophenoxy)cyclohex-1-en-1-yl)vinyl)-1-(6-((2,5-dioxopyrrolidin-1-yl)oxy)-6-oxohexyl)-3,3-dimethyl-3H-indol-1-ium-5-sulfonate, 98%, 98%, 800CW NHS ester, 95.0%. Offered by: GLPBio, Ambeed, Chemat, MedChemExpress. Available pack sizes: 1mg, 50mg, 5mg, 10mg, 25mg, 5 mg, 25 mg, 1 mg.