Quinoline yellow, Quinoline Yellow WS, C.I. 47005, or Food Yellow 13, is a yellow food dye. Chemically it is a mixture of disulfonates (principally), monosulfonates and trisulfonates of 2-(2-quinolyl) indan-1,3-dione. It is also listed under CAS number .
Quinoline Yellow SS (Spirit Soluble) is its form insoluble in water. It lacks the sulfonate group.
It is more commonly known as E104
in terms of E numbers
. It is a food colorant
that induces a dull yellow, or greenish yellow colour. It can be found in ices, cough sweets, scotch eggs
and smoked haddock
. It is one of the colors that the Hyperactive Children's Support Group
recommends be eliminated from the diet of children. It may cause contact dermatitis
. While being a commonly used color in the UK
, its use is banned in Japan
and the United States
. It was banned in Australia
but its use has been permitted since 2003.
It is used as a pigment for tattoos.
A study commissioned by the UK's Food Standards Agency
found that when used in a mixture of other preservatives, increased levels of hyperactivity
and decreased levels of intelligence in children were observed.