Fast Green FCF

Fast Green FCF
Fast Green FCF.svg
Fast Green FCF ball-and-stick.png
Fast Green FCF ball-and-stick animation.gif
IUPAC name
Other names
Food green 3,
FD&C Green No. 3,
Green 1724,
Solid Green FCF, and
C.I. 42053
3D model (JSmol)
ECHA InfoCard 100.017.356
E number E143 (colours)
Molar mass 765.89 g/mol
R-phrases (outdated) R36 R37 R38
NFPA 704
Flammability code 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g., canola oilHealth code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroformReactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogenSpecial hazards (white): no codeNFPA 704 four-colored diamond
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is ☑Y☒N ?)
Infobox 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.

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] In the United States, Fast Green FCF is the least used of the seven main FDA approved dyes.


This substance has been found to have tumorigenic effects in experimental animals, as well as mutagenic effects in both experimental animals and humans. It furthermore risks irritation of eyes, skin, digestive tract, and respiratory tract in its undiluted form.[3]


  1. ^ "Fast Green FCF". IPCS INchem. Retrieved 2007-10-18.
  2. ^ "Fast Green FCF, INS: 143". Food and Agriculture Organisation of the United Nations. Retrieved 2007-10-18.
  3. ^