Synonyms (2E)-3-(4-hydroxyphenyl)prop-2-enoic acid; 4-hydroxycinnamic acid; 3-(4-Hydroxyphenyl)acrylic acid; p-Hydroxy-cinnamic acid; p-Hydroxycinnamic acid; p-Coumaric acid; 3-(4-Hydroxyphenyl)-2-propenoic acid; 2-(4-hydroxyphenyl)prop-2-enoic acid
Molecular Formula C9H8O3
Molecular Weight 164.158
CAS Registry Number 7400-08-0
EINECS 231-000-0
Density 1.279g/cm3
Melting point 210-213
Refractive index 1.6
Characters: A white to light yellow powder. Soluble in hot ether, hot alcohol, slightly soluble in benzene, insoluble in petroleum ether, insoluble in water.
Usage: used as pharmaceutical intermediates and flavor industry.
1, pharmaceutical: expectorant drugs can be used to prime the synthesis of the cuckoo. Coronary heart disease in the pharmaceutical industry for the production of intermediate treatment given Kexin, and local anesthetic used in the manufacture, fungicides, and hemostatic and so on; can inhibit the cervix The role of cancer; also be used to synthesize the anti-adrenergic drugs esmolol.
2, Agriculture: In the pesticide industry for the production of plant growth promoting agents, fungicides, and fresh fruits and vegetables long-term preservative. In addition, hydroxy acid can also be used to determine the uranium and hunger of the chemical reagents, for the production of photosensitive resin, the main raw material of ethylene plug oil hanging IV.
3, the chemical industry:
1) hydroxy acid is very important flavor and fragrance, allows the use of spices, primarily used to configure the spicy cherry, apricot, honey and other spices. Used in daily chemical industry in the preparation of soap and cosmetics fragrance.
2) hydroxycinnamic acid or a strong effect of the conductive material in the liquid crystal display industry, extensive research in recent years. Polyimide by hydroxy hydroxy acid and the grafting reaction of the hydroxy with photosensitive polyimide, and by IR, NMR to determine the photosensitivity of the hydroxyl polyimide structure. The synthetic hydroxy polyimide liquid crystal alignment layer as used in liquid crystal display, the demonstrated good thermal stability.
4, the cosmetics: hydroxy cinnamic acid on the tyrosinase enzyme and two single-phenol phenol activity was inhibited, resulting in a single phenol and two phenol enzyme activity decreased by 50%, used in cosmetics, which inhibit the formation of melanin.
5, the hydroxy acid new research direction: In recent years, many scientists at home and abroad will hydroxy acid is also committed to research and medical fields extended to the micro-organisms - cell differentiation and telomerase activity; cervical cancer inhibition. Hydroxy acid in the future will be more and more into our lives.
The application of liquid crystal displays:
Also has both a good orientation of liquid crystal in the liquid crystal phase transition temperature can have good thermal stability of the new materials.
Orientation based technology for liquid crys
