Clerodendron trichotomum Thunb.: Blue Pigment Production for Food Color
Clerodendron trichotomum Thunb. (Fig. 1), whose Japanese name is kusagi, meaning bad-smelling tree, belongs to the Verbenaceae and grows wild in fields and mountains in Japan and China. It has a stalk of more than 3 m in height and a wide egg-shaped leaf. It blossoms in August, has many white flowers with five red sepals, and the fruits assume a sky-blue pigment when they ripen in October. Formerly, the blue pigment of the fruit was used to color clothes in sky-blue and its extract was used as a herbal medicine. Clerodendrine A, B and clerodenronine A, B are contained in the leaf, and clerodron and clerodon triterpenoids are contained in the root. These substances are effective in the treatment of hypertension, rheumatism, diarrhea, etc.
KeywordsHeat Stability Indigo Carmine Blue Pigment Color Tone Lithospermum Erythrorhizon
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