Red 2G
Red 2G is a synthetic red azo dye. It is soluble in water and slightly soluble in glycerol. It usually comes as a disodium salt of 8-acetamido-1-hydroxy-2-phenylazonaphthalene-3,6 disulfonate.
Preparation
Red 2G is produced by azo coupling of Acetyl-H acid and diazonium derivative of Aniline under basic conditions:Uses
Food dye
In the European Union, Red 2G was used as a food dye. However, it was only permitted for use in breakfast sausages with a minimum cereal content of 6% and burger meat with a minimum vegetable and/or cereal content of 4%.Following safety concerns raised by the European [Food Safety Authority] in its opinion of 5 July 2007, the European Commission has prepared a draft Regulation to suspend use of E128 as a food colouring. This proposed course of action was unanimously approved by European Union Member States at a meeting of the Standing Committee of the Food Chain and Animal Health on 20 July 2007. and Commission Regulation No 884/2007 on emergency measures suspending the use of E 128 Red 2G as food colour was published in the Official Journal of the European Union on 27 July 2007.
Red 2G is also banned in Australia, Canada, Japan, Norway, and Malaysia. It was banned in Israel in July 2007.
It is relatively insensitive to the bleaching effect of sulfur dioxide and sodium metabisulfite. In the intestines, Red 2G can be converted to the toxic compound aniline, so there are concerns Red 2G may ultimately interfere with blood haemoglobin, as well as cause cancer.