Niacinimide, also known as vitamin B3, is a water-soluble vitamin with applications in nutrition and skin care. It is a common treatment for Niacin deficiency and can reduce the risk of some forms of skin cancer. In skincare it is an anti-inflammatory, used to treat acne and a host of other applications.
Potassium ferricyanide is bright red salt with the formula K3[Fe(CN)6]. It contains the octahedrally coordinated [Fe(CN)6]3− ion. It is used in a variety of applications including iron and steel, electroplating, etching, dying wool as well as a common reagent.