Tartrazine n. : An artificial dyestuff obtained as an orange-yellow powder, and regarded as a phenyl hydrazine derivative of tartaric and sulphonic acids.

Example:
What products contain Tartrazine?

Taxonomy
tartrazine, intolerance, sensitivity, 04-15, coloring, food coloring, FD&C Yellow, ncbi.nlm, nlm.nih, additives, free encyclopedia, Products, Foods, research, E102, mice, food colours, 12-03.

Defination from the web:
Tartrazine is a commonly used color all over the world, mainly for yellow, but can also be used with Brilliant Blue FCF (FD&C Blue 1, E133) or ... Products including tartrazine commonly include confectionery, cotton candy, soft drinks (Mountain Dew), energy drinks, instant puddings, flavored ...