Indocyanine green

Indocyanine green
Names
	IUPAC name sodium 4-[2-[(1E,3E,5E,7Z)-7-[1,1-dimethyl-3-(4-sulfonatobutyl)benzo[e]indol-2-ylidene]hepta-1,3,5-trienyl]-1,1-dimethylbenzo[e]indol-3-ium-3-yl]butane-1-sulfonate
	Other names Cardiogreen; Foxgreen; Cardio-Green; Fox Green; IC Green; Spy Agent Green
Identifiers
CAS Number	3599-32-4 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	4115884
ChEBI	CHEBI:31696 ;
ChEMBL	ChEMBL1646 ;
ChemSpider	18108 ;
ECHA InfoCard	100.020.683
EC Number	222-751-5;
IUPHAR/BPS	4844;
KEGG	D01342;
PubChem CID	5282412;
UNII	IX6J1063HV ;
CompTox Dashboard (EPA)	DTXSID2023145 ;
	InChI InChI=1S/C43H48N2O6S2.Na/c1-42(2)38(44(28-14-16-30-52(46,47)48)36-26-24-32-18-10-12-20-34(32)40(36)42)22-8-6-5-7-9-23-39-43(3,4)41-35-21-13-11-19-33(35)25-27-37(41)45(39)29-15-17-31-53(49,50)51;/h5-13,18-27H,14-17,28-31H2,1-4H3,(H-,46,47,48,49,50,51);/q;+1/p-1 Key: MOFVSTNWEDAEEK-UHFFFAOYSA-M ; InChI=1/C43H48N2O6S2.Na/c1-42(2)38(44(28-14-16-30-52(46,47)48)36-26-24-32-18-10-12-20-34(32)40(36)42)22-8-6-5-7-9-23-39-43(3,4)41-35-21-13-11-19-33(35)25-27-37(41)45(39)29-15-17-31-53(49,50)51;/h5-13,18-27H,14-17,28-31H2,1-4H3,(H-,46,47,48,49,50,51);/q;+1/p-1 Key: MOFVSTNWEDAEEK-REWHXWOFAS;
	SMILES [Na+].[O-]S(=O)(=O)CCCC[N+]=3c2ccc1c(cccc1)c2C(C=3C=CC=CC=CC=C6N(c5ccc4ccccc4c5C6(C)C)CCCCS([O-])(=O)=O)(C)C;
Properties
Chemical formula	C43H47N2NaO6S2
Molar mass	774.96 g/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Pharmacology
ATC code	V04CX01 (WHO)
Pregnancy; category	AU: B2;
Legal status	AU: S4 (Prescription only);
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Indocyanine green (ICG) is a cyanine dye used in medical diagnostics. It is used for determining cardiac output, hepatic function, liver and gastric blood flow, and for ophthalmic and cerebral angiography. It has a peak spectral absorption at about 800 nm. These infrared frequencies penetrate retinal layers, allowing ICG angiography to image deeper patterns of circulation than fluorescein angiography. ICG binds tightly to plasma proteins and becomes confined to the vascular system. ICG has a half-life of 150 to 180 seconds and is removed from circulation exclusively by the liver to bile.

ICG is a fluorescent dye which is used in medicine as an indicator substance (e.g. for photometric hepatic function diagnostics and fluorescence angiography) in cardiac, circulatory, hepatic and ophthalmic conditions. It is administered intravenously and, depending on liver performance, is eliminated from the body with a half life of about 3 to 4 minutes. ICG sodium salt is normally available in powder form and can be dissolved in various solvents; 5% (< 5% depending on batch) sodium iodide is usually added to ensure better solubility. The sterile lyophilisate of a water-ICG solution is approved in many European countries and the United States under the names ICG-Pulsion and IC-Green as a diagnostic for intravenous use.