Light green to dark green density: 5.21. Dissolve point: 2266 degrees. Boiling point: 4000 degrees. A metal luster, has the magnetic, hiding power is strong, high temperature resistant, resistance to sun exposure, insoluble in water, soluble in acid, in the atmosphere is stable and the general concentration of acid and alkali and sulfur dioxide no effect, with excellent quality and outstanding pigment coptidis thizoma.

Light green to dark green density: 5.21. Dissolve point: 2266 degrees. Boiling point: 4000 degrees. A metal luster, has the magnetic, hiding power is strong, high temperature resistant, resistance to sun exposure, insoluble in water, soluble in acid, in the atmosphere is stable and the general concentration of acid and alkali and sulfur dioxide no effect, with excellent quality and outstanding pigment coptidis thizoma.