I am looking for spectrophotometer readings for
tartrazine 1934-21-0 / 19140
malachite green orthochlorinated , basic blue 1 , setaglaucin , rhoduline blue 6g 42025
patent blue 3536-49-0 / 42051
crystal violet , basic violet 9 541-62-9 / 42555
erythrosine , acid red 51 561-63-1 / 45430
rose bengal , acid red 94 632-69-9 / 45440

Sigma and others did not help.

Umut