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P-Hydroxycinnamic Acid

P-hydroxycinnamic acid is a chemical substance with the molecular formula of C9H8O3. It is a hydroxyl derivative with antioxidant properties. P-hydroxycinnamic acid is the main component of lignocellulose. Research shows that it can reduce the formation of carcinogenic nitrosamines and reduce the risk of cancer.

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It can be used for the synthesis of a new expectorant drug rhododendron. It is used in the pharmaceutical industry as an intermediate for the production of the coronary heart disease treatment drug Kexinding, as well as for the manufacture of local anesthetics, bactericides and hemostatic drugs; It can inhibit cervical cancer; It can also be used to synthesize the antiadrenergic drug esmolol


In the pesticide industry, it is used to produce plant growth promoters, long-acting fungicides and preservatives for fruits and vegetables. In addition, p-hydroxycinnamic acid can also be used as a chemical reagent for the determination of uranium and vanadium, as well as vinyl cinnamic acid, the main raw material of photosensitive resin.


P-hydroxycinnamic acid has an inhibitory effect on the activity of tyrosinase monophenolase and diphenolase, resulting in a 50% reduction in the activity of monophenolase and diphenolase. It is used in cosmetics to inhibit the formation of melanin.

Chemical industry

1) P-hydroxycinnamic acid is a very important essence spice. The allowed spices are mainly used to prepare spice cherries, apricots, honey and other spices. In the daily chemical industry, it is used to prepare soap and cosmetics essence.

2) P-hydroxycinnamic acid is also a powerful conductive material, which has been widely studied in the liquid crystal display industry in recent years. The photosensitive p-hydroxy polyimide was synthesized by the graft reaction of hydroxy polyimide and p-hydroxycinnamic acid. The structure of the photosensitive p-hydroxy polyimide was determined by IR and NMR. The synthesized p-hydroxypolyimide was used as liquid crystal orientation layer in liquid crystal display devices, and proved to have good thermal stability.

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