Fluorescein 5(6)-isothiocyanate

5(6)-异硫氰酸荧光素

Also known as: Fluorescein isothiocyanate (mixture of 5- and 6- isomers), FITC (mixture of isomers), 5(6)-FITC, Fluorescein 5(6)-isothiocyanate, mixture of isomers >90%, Fluorescein Isothiocyanate (Mixture of 5- and 6- isoMers), Isothiocyanatofluorescein, Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 3',6'-dihydroxy-5-isothiocyanato-

Fluorescein 5(6)-isothiocyanate (CAS 27072-45-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C21H11NO5S and a molecular weight of 389.381 g/mol. It is also known as Fluorescein isothiocyanate (mixture of 5- and 6- isomers), FITC (mixture of isomers) and 5(6)-FITC. Key properties include a melting point of >360ºC(lit.), a boiling point of 708.6±60.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 382.4±32.9 °C. GHS signal word: Danger. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

27072-45-3

Jingsj CID

J-46922-3

Molecular Formula

C₂₁H₁₁NO₅S

Chinese Name

5(6)-异硫氰酸荧光素

Molecular Weight

389.381 g/mol

Category

Organic Acids

Last updated

8/21/2026