4962. Indocyanine Green

Nomenclature

CAS number: 3599-32-4
2-[7-[1,3-Dihydro-1,1-dimethyl-3-(4-sulfobutyl)-2H-benz[e]indol-2-ylidene]-1,3,5-heptatrienyl]-1,1-dimethyl-3-(4-sulfobutyl)-1H-benz[e]indolium inner salt, sodium salt; anhydro-3,3,3′,3′-tetramethyl-1,1′-bis(4-sulfobutyl)-4,5,4′,5′-dibenzoindotricarbocyanine hydroxide inner salt sodium salt; Fox green; Cardio-Green (Becton Dickinson).
C43H47N2NaO6S2; mol wt 774.96.
C 66.64%, H 6.11%, N 3.61%, Na 2.97%, O 12.39%, S 8.28%.

Description and references

Prepn: Heseltine, Brooker, US 2895955 (1959 to Kodak).

Chemical structure

Properties

A tricarbocyanine type of dye with infrared absorbing properties; peak absorption at about 800 nm. Has little or no absorption in the visible. Commercial product contains moisture and about 5% sodium iodide as contaminant.

Use

In infrared photography; in prepn of Wratten filters.

Therapeutic Category

Diagnostic aid (blood volume determination, cardiac output, hepatic function).

Keywords

Diagnostic Aid