CAS 92557-80-7 appears in our catalog under these names: 5-Carboxyfluorescein-N-hydroxysuccinimide Ester, 5-FAM SE/ 98.49% (existing batch purity), 5–FAM SE, 5-Carboxyfluorescein N-Succinimidyl Ester, >90.0%(HPLC), 5-Carboxyfluorescein,succinimidyl ester. Offered by: TRC, TargetMol, GLPBio, TCI, Biosynth. Available pack sizes: 100mg, 25mg, 5mg, 10mg, 50mg, 500mg, 10mM (in 1ml dmso), 20mg.