Chlorophyll is a colorant that is a green pigment present in all green plants. it is used in sausage casings, oleomargarine, and shortening.Chlorophyll molecules are theprincipal sites of light absorption inthe light-dependent reactions ofphotosynthesis. They are magnesium-containing porphyrins, chemicallyrelated to cytochrome andhaemoglobin.Chlorophyll is a natural food pigment extracted from clover, nettle and dried silkworm sand. The main components are chlorophyll a, chlorophyll b, sodium copper chlorophyllin. The product is a dark green viscous substance, easily soluble in water and various organic solvents, in neutral or alkaline conditions, the color is stable green.