Ponceau 4R (Acid Red 18) is red to deep red powder, water solution is red, odorless. Soluble in water, soluble in glycerol, slightly soluble in ethanol, insoluble in oil. Light resistance, good acid resistance, stable to citric acid and tartric acid, poor bacterial resistance, heat resistance, reduction resistance is quite poor. Brown in alkaline solution. Acid red 18 (AR18), also known as neocarmine,
Application:
Ponceau 4R is a common synthetic pigment added in candy, cakes, drinks, used as food coloring agent, medicine and cosmetics coloring agent.