Fluorescein isothiocyanate (FITC) is a derivative of fluorescein used in wide-ranging applications including flow cytometry. FITC is the original fluorescein molecule functionalized with an isothiocyanate reactive group (-N=C=S), replacing a hydrogen atom on the bottom ring of the structure. This derivative is reactive towards nucleophiles including amine and sulfhydryl groups on proteins.

CAS：27072-45-3
中文别名：异硫氰酸荧光素(5-,6-异构体混合物);异硫氰荧光素;异硫氰酸荧光素(FITC);荧光素5(6)-异硫氰酸酯;
英文别名：FITC-I;Fluorescein Isothiosyanate;Isothiocyanatofluorescein;5-FITC;5-Isothionatofluorescein;Fluorescein Isothiocyanate;FITC ISOMER;Fluorescein 5(6)-isothiocyanate;FITC isomer I;FITC;Fluorescein-5-isothiocyanate;fluorescein isothiocyanate isomer 1;
分子式：C21H11NO5S
分子量：389.381
精确质量：389.036
Psa：120.44
Logp：4.4001

UNII：7BUU93N0HM

密度：1.54g/cm3
沸点：708.6ºC at 760mmHg
熔点：>360ºC(lit.)
闪点：382.4ºC
折射率：1.753
储存条件：2-8ºC
蒸汽压：9.53E-21mmHg at 25°C

安全说明：S22
危险类别码：R42/43
WGK Germany：3
危险品标志：Xn
危险性描述：H334
危险性防范说明：P261; P342 + P311
危险标志：GHS08
信号词：Danger