Multiple choice Alcian blue and luxol fast blue are the examples of ____________ dyes. Diazo compounds Nitro dyes Phthalocyanine dyes Quinone-imine dyes Reveal answer Fill a bubble to check yourself C Correct answer Explanation The phthalocyanine dyes are few in number, but are commonly used. Alcian blue is employed in one of the standard methods for acid mucopolysaccharides. Luxol fast blue is used to demonstrate myelin.