Rutin is yellow or kelly powder or imperceptibility crystal, no smell, no sapor, being deeply in air and brown colloid when heating to 185-192 C. It’s hard to dissolve in water(0.0013%), but can dissolve in hot water(0.55%). It belongs to medicine of vitamin P, having the functions of reducing abnormity general characteristics and brittleness of thin blood vessel. It's mainly used to prevent hypertensive.