Patent Blue V Dye

**Semantic type:** Indicator, Reagent, or Diagnostic Aid|Organic Chemical

**Definition:** A synthetic dye with imaging and food coloring property. It is a sodium or calcium salt of [4-(alpha-(4-diethylaminophenyl)-5-hydroxy- 2,4-disulfophenyl-methylidene)-2,5-cyclohexadien-1-ylidene] diethylammonium hydroxide inner salt. Patent blue V dye is used in sentinel lymph node (SLN) technique to guide nodal dissection or other imaging procedures.

**Synonyms:** - dye, patent blue V - dye, patent blue violet - patent blue violet dye