The extraction and properities of orange pigment from umbilicalike orange, which is a variant of sweet orange,were studied. The experimental results show that it has good light resistance at pH=2~6 ,heat resisting property at 40~100 ℃ for 2.5 hours, and it is soluble in water.The effect of Cu2+?Ca2+?Mn2+?Na+?Mg2+on the pigment is not remarkable.The pigment has better endurance capability against oxidizing agent (H2O2), but it has less resistance capability against reducing agent (Na2SO...