CAS number：122-88-3
molecular formula：C8H7ClO3
molecular weight：186.59
EINECS number：204-581-3

English synonyms

2-(4-Chloro-phenoxy)acetic acid;RARECHEM AL BO 0389;P-CHLOROPHENOXYACETIC ACID;p-Monochlorophenoxy acetic acid;(2-chlorophenoxy)ethanoicacid;kyselina4-chlorfenoxyoctova;Marks 4-cpa;marks4-cpa

Related categories

Biochemical reagents; pesticide residues, veterinary drugs and fertilizers; agricultural raw materials; pesticide raw materials; food additives; plant hormones and nucleic acids; pesticides; feed additives; plant growth hormones; plant growth regulators; aromatics; analytical standards; general reagents; Acids; herbicides; pesticide intermediates; biochemical reagents - plant hormones and nucleic acids; organic chemical raw materials; agricultural and veterinary raw materials; raw materials; other raw materials; chemical raw materials; agricultural raw materials - herbicides; additives; Alcohols (substituted);Organic acids;PLANT GROWTH REGULATOR;Auxins;Biochemistry;Plant Growth Regulators;General biochemical reagents-plant hormones;Chemical materials;Pesticides

Introduction

p-Chlorophenoxyacetic acid is a systemic, efficient and multifunctional plant growth regulator, which can promote biosynthesis and biotransfer in plants, not only prevent flower and fruit drop, improve fruit production rate, increase fruit growth speed, and promote early Mature can also achieve the purpose of improving plant quality. At the same time, it also has the function of herbicide. It is mainly used in tomatoes, grapes, vegetables, etc., which can improve the yield and quality of crops, and has great practical value.

Chemical properties

White crystals. The melting point is 157-159°C. Soluble in ethanol, acetone and benzene, slightly soluble in water. Has a clear fragrance.

Use

●  Plant growth hormone, used as a growth regulator, fruit drop preventer, herbicide, can be used in tomatoes, vegetables, peach trees, etc., and also used as a pharmaceutical intermediate.

●  Plant growth hormone, used as a growth regulator, anti-fruit drop agent, herbicide, and also used as a pharmaceutical intermediate.

●  p-Chlorophenoxyacetic acid can be used to synthesize a new class of hypoxia-inducible factor-1 inhibitors.

Production method

●  It is obtained by chlorination after condensation of phenol and chloroacetic acid. 1. Condensation Mix the molten phenol with 15% sodium hydroxide solution, and neutralize the chloroacetic acid aqueous solution with sodium carbonate, put the two into the reaction pot and mix, heat and reflux for 4 hours. After the reaction is complete, add hydrochloric acid to adjust the pH to 2-3, stir and cool, crystallize, filter, wash with ice water, and dry to obtain phenoxyacetic acid. 2. Chlorination Mix and dissolve phenoxyacetic acid and glacial acetic acid, add iodine tablets, and pass chlorine at 26-34°C. Leave it overnight after the chlorine pass through, precipitate crystals in cold water the next day, filter, wash with water until neutral, and dry to obtain the finished product.

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