Medium chrome yellow, also known as lead chrome yellow. Yellow pigment containing lead chromate PbCrO4. Products generally include lemon chrome yellow, light chrome yellow, medium chrome yellow, deep chrome yellow and orange chrome yellow. The color light varies with the ratio of raw materials and preparation conditions. The main component of chrome yellow is lead chromate. Light chrome yellow is a isomorphic crystal of lead chromate and lead sulfate. Orange chrome yellow (i.e. Chrome Orange) is alkaline lead chromate. Bright color, high coloring power and strong covering power. Insoluble in water and oil, easily soluble in inorganic strong acid and alkali solutions. It reacts to hydrogen sulfide. Poisonous! Used for coloring paint, ink, rubber, plastic, cultural and educational supplies, etc.