the cationic carbocyanine dye , 1-ethyl-2- [ 3- ( 1-ethylnaphtho [ 1 , 2d ] -thiazolin-2-ylidene ) -2-methylpropenyl ] -naphtho [ 1 , 2d ] thiazolium bromide , interacts with several classes of anionic polymers , exhibiting metachromasia .
C0006222
bromide
C0003075
anionic