Fast Green FCF

• CAT Number: R064766
• CAS Number: 2353-45-9
• Molecular Formula: C37H34N2O10S3 • 2Na
• Molecular Weight: 808.91
• Purity: ≥95%
• Synonyms: NSC 379443
• Storage: Room temperature
• IUPAC Name: disodium;2-[[4-[ethyl-[(3-sulfonatophenyl)methyl]amino]phenyl]-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]-5-hydroxybenzenesulfonate
• InChI: InChI=1S/C37H36N2O10S3.2Na/c1-3-38(24-26-7-5-9-33(21-26)50(41,42)43)30-15-11-28(12-16-30)37(35-20-19-32(40)23-36(35)52(47,48)49)29-13-17-31(18-14-29)39(4-2)25-27-8-6-10-34(22-27)51(44,45)46;;/h5-23H,3-4,24-25H2,1-2H3,(H3,41,42,43,44,45,46,47,48,49)
• InChIKey: RZSYLLSAWYUBPE-UHFFFAOYSA-L
• SMILES: O=S(C(C=C(O)C=C1)=C1/C(C2=CC=C(N(CC)CC3=CC(S([O-])(=O)=O)=CC=C3)C=C2)=C(C=C/4)/C=CC4=[N+](CC)/CC5=CC=CC(S([O-])(=O)=O)=C5)([O-])=O.[Na+].[Na+]

Fast Green FCF(CAT: R064766) is a synthetic triarylmethane dye with a vivid blue-green color, commonly used as a food colorant, biological stain, and analytical reagent. It appears as a dark green powder, soluble in water and slightly soluble in ethanol. In the food industry, it is designated as FD&C Green No. 3 (E143) and approved in certain regions for coloring beverages, candies, and processed foods. In biological applications, Fast Green FCF serves as a protein stain in gel electrophoresis and histology, often as a counterstain to other dyes. It is considered relatively stable to light and heat but should be stored in dry, cool conditions