Red 2G
From Wikipedia, the free encyclopedia
Red 2G, Acid Red 1, Food Red 10, Amidonaphthol red G, azogeranine, azophloxine, azofloxin, or C.I. 18050, is a synthetic red azo dye. It is soluble in water and slightly soluble in ethanol. It usually comes as a disodium salt of 8-actamido-1-hydroxy-2-phenylazonaphthalene-3,6 disulphonate.
When used as a food dye, its E number is E128. It is mainly used in cooked meat products and sausages, and also in some jams, alcoholic beverages, eggs, and milk and dairy products. It is relatively insensitive to the bleaching effect of sulfur dioxide (E220) and sodium metabisulfite (E223). In the intestines it can be converted to aniline, so there are concerns Red 2G may interfere with blood haemoglobin.
It is one of the colourants that the Hyperactive Children's Support Group recommends be eliminated from the diet of children.
In European Union, Red 2G is allowed only in United Kingdom. Red 2G is also banned in Australia, Austria, Canada, Japan, Norway, Sweden, and the United States.
It is also used as a dye for coatings, inks, paper, crepe paper, and fine tissue.
Red 2G can be also used for staining in histology, though rarely, eg. as a component of Masson's trichrome.
Its CAS number is [] and its SMILES structure is OC1=C3C(C=C (S(=O)([O-])=O) C=C3NC(C)=O)=CC (S(=O)([O-])=O)=C1 /N=N/C2=CC=CC=C2.
