Patent blue V

Patent Blue V, also called Food Blue 5, Sulphan Blue, Acid Blue 3, L-Blau 3, C-Blau 20, Patentblau V, Sky Blue, or C.I. 42051, is a sky blue synthetic triphenylmethane dye used as a food coloring.

P 1355 (OTTO) Patent blue V Cas 3536-49-0 - used in lymphangiography and sentinel node biopsy as a dye to color lymph vessels. P 1355 (OTTO) Patent blue V Cas 3536-49-0 - used in dental disclosing tablets as a stain to show dental plaque on teeth.