CAS 117548-22-8 appears in our catalog under these names: 5(6)-Carboxyfluorescein N-Hydrosuccinimide ester, 5(6)-FAM SE/ 94.29% (existing batch purity), 5(6)-Carboxyfluorescein N-hydroxysuccinimide ester, 98.00%, 5(6)-Carboxyfluorescein succinimidyl ester, mixture of isomers, 5(6)-FAM SE 95% (isomer mixture). Offered by: Chemat Brand, TargetMol, Chemat, Biosynth, Ambeed. Available pack sizes: on request, 10mg, 50mg, 100mg, 200mg, 500mg, 0,25g, 0,1g.