Chloroacetic acid: Preparation and chemical properties

chloroacetic acid is acetic acid, in which one of the hydrogen atoms in the methyl group substituted by a free chlorine atom.It is produced by reacting acetic acid with chlorine.

main raw material for production is acetic acid.Chloroacetic acid can also be obtained by hydrolysis of trichlorethylene.

Hydrolysis get chemically pure product.However, this method involves the use of pure, distilled water with no impurities.

chloroacetic acid is used to produce various types of dyes, medicines, vitamins and various pesticides.It is also used as a surface-active agent (surfactant).

the chlorination of acetic acid in a medium of inorganic catalysts (namely acetic anhydride, sulfur and phosphorus) obtained chloroacetic acid, formula-COOH wherein CH2Cl:

CH3-COOH → ↑ + Cl2 = & gt;CH2Cl-COOH + HCl.Physical properties

Chloroacetic acid is hygroscopic, transparent crystal having a melting point of 61.2 ° C and the boiling point 189.5 ° C.The substance is readily soluble (as in alcohol or in an aqueous medium, as well as acetone, benzene, and carbon tetrachloride).

monochloroacetic acid - a toxic and extremely hazardous substance ingestion is often seen death.After contact with skin chloroacetic acid causes severe burns that do not heal for a long time.

Inhalation acid can be observed inflammatory changes in the lungs and in the upper and lower respiratory tract.

Working industrial plants for the production of monochloroacetic acid suffer a violation of smell, chronic rhinopharyngitis, peeling and dryness of the skin.

also in long-term cooperation with the aggressive matter lesions observed epidermis expressed dermatitis on the face, neck, upper and lower extremities, in rare cases - the torso.

chloroacetic acid in the human body turns into tiodiuksusnuyu acid, which is excreted in the feces and urine.

Basic methods precautionary operation:

- is strictly forbidden to breathe fumes, gas, smoke and dust;

- have to use personal protective equipment when performing work associated with any contact with acid (impermeable overalls, safety goggles, rubber boots and gloves);

- in the case of inhalation or contact with acid on the skin should immediately seek qualified help the nearest medical facility.

Maximum allowable theoretically safe concentration of chloroacetic acid in the air of production facilities is about one mg / m3.When transporting

acid, it is packaged in a polymeric container (the container or barrel), fiber drums and steel containers.It can be transported by any type of covered transport.

Note that monochloroacetic acid is flammable and explosive.This substance is highly flammable.