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Fast Green FCF

Fast Green FCF

IUPAC name	ethyl - [4 - [ [4 - [ethyl -[(3 - sulfophenyl) methyl] amino] phenyl] - (4 - hydroxy - 2 - sulfophenyl) methylidene] - 1 - cyclohexa - 2, 5 - dienylidene] - [(3 - sulfophenyl) methyl] azanium
Other names	Food green 3, FD&C Green No. 3, Green 1724, Solid Green FCF, and C.I. 42053
Identifiers
CAS number	2353-45-9
PubChem	16888
SMILES	CC\[N+](CC5=CC (S(=O)([O-])=O) =CC=C5)=C(C=C3) /C=C\C3=C(C2=C (S(=O)([O-])=O) C=C(O)C=C2)/C1=C C=C(N(CC)CC4=C C=CC(S(=O)([O-]) =O)=C4)C=C1
Properties
Molecular formula	C₃₇H₃₇N₂O₁₀S₃+
Molar mass	765.89 g/mol
Hazards
R-phrases	R36 R37 R38
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Fast Green FCF, also called Food green 3, FD&C Green No. 3, Green 1724, Solid Green FCF, and C.I. 42053, is a sea green triarylmethane food dye. Its E number is E143.

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Fast Green FCF is recommended as a replacement of Light Green SF yellowish in Masson's trichrome, as its color is more brilliant and less likely to fade. It is used as a quantitative stain for histones at alkaline pH after acid extraction of DNA. It is also used as a protein stain in electrophoresis. Its absorption maximum is at 625 nm.

Fast Green FCF is poorly absorbed by the intestines. ^[1] Its use as a food dye is prohibited in European Union and some other countries. It can be used for tinned green peas and other vegetables, jellies, sauces, fish, desserts, and dry bakery mixes at level of up to 100 mg/kg. ^[2]

Notes

^ Fast Green FCF. IPCS INchem. Retrieved on 2007-10-18.
^ Fast Green FCF, INS: 143. Food and Agriculture Organisation of the United Nations. Retrieved on 2007-10-18.

Categories: Triarylmethane dyes | Staining dyes | Food colorings