3DChem.com - Chemistry, Structures & 3D Molecules a visual and interactive website showcasing the beautiful world of chemistry

Ponceau 4R (Molecule of the Month for September 2007)

E124, Food Red 7, C.I. 16255, Cochineal Red A, New Coccine, Acid Red 18, SX purple

Ponceau 4R is a synthetic colourant that may be added to foods. It is denoted by E Number E124. Ponceau 4R is a red azo dye which can be used in a variety of food products.

Ponceau 4R is considered carcinogenic in some countries, including the USA, Norway, and Finland, and it is currently listed as a banned substance by the U.S. Food and Drug Administration (FDA). [2] Since 2000, the FDA has seized Chinese-produced haw flakes (a fruit candy) on numerous occasions for containing Ponceau 4R.

A study commissioned by the UK's Food Standards Agency found that when used in a mixture of other colourants and preservatives, increased levels of hyperactivity in children were observed.

Formal Chemical Name (IUPAC)
trisodium (E)-7-hydroxy-8-((4-sulfonatonaphthalen-1-yl)diazenyl)naphthalene-1,3-disulfonat




Picture of Ponceau 4R 3D model

click on the picture of  Ponceau 4R above to interact
with the 3D model of the
Ponceau 4R structure
(this will open a new browser window)

Picture of Ponceau 4R

C20 H11 N 2Na3 O10 S3

Update by Karl Harrrison
(Molecule of the Month for September 2007 )

Stacks Image 34 All the images on this web site are are made available with a Creative Commons Attribution license and so can be used as long as the attribution © Karl Harrison 3DChem.com is written with the image. High resolution images and illustrations are available on request.