11. Many lake pigments are azo dyes . 12. Because this azo dyes are cheap, Sudan dyes are likeable for food coloring as well. 13. Orthanilic acid is a structural component of some azo dyes which consequently have poor bacterial degradation. 14. With suitable adjustment of dyebath conditions the two components react to produce the required insoluble azo dye . 15. However, Allura Red AC is banned in many European countries because it is an azo dye . 16. Azo dyes derived from benzidine are carcinogens; exposure to them has classically been associated with bladder cancer.17. The compound is produced as an intermediate to the pesticide chlordimeform and a precursor to some azo dyes . 18. It is used in the synthesis of azo dyes such as Rocceline ( a . k . a. 19. The first major class of antibiotics was the sulfa drugs, derived by German chemists originally from azo dyes . 20. Most brands of CD-R use this dye except Taiyo Yuden ( now azo dyes , respectively ).
