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Physical And Chemical Properties Of Monochloroacetic Acid

Shandong Minji Chemical Co.,Ltd | Updated: May 11, 2017

Chloroacetic acid alias a chloroacetic acid, packaging using polypropylene woven bag lined with double plastic bag. In the Monochloroacetic Acid transport process should prevent direct sunlight, (rain, etc.) damp, packaging damage. Should be stored in a cool, ventilated and dry place, away from the fire, heat, should be with the oxide, alkali, flammable and other items stored separately. At room temperature shelf life of one year, the summer temperature should not be long-term storage.

Physical and chemical properties of monochloroacetic acid

Ingredients: Content: Excellent: ≥99.0%; Grade ≥ 97.5%; Qualified ≥ 96.0%.

Appearance and character: colorless crystal, with deliquescence.

Melting point (° C): 61-63

Boiling point (℃): 188

Monochloroacetic Acid Relative density (water = 1): 1.58 (20/20 ° C)

Relative vapor density (air = 1): 3.26

Saturated vapor pressure (kPa): 0.67 (71.5 ° C)

Ignition temperature (℃):> 500

Lower explosion% (V / V): 8.0

Solubility: soluble in water, ethanol, ether, chloroform, carbon disulfide.

Traits: colorless or white easy to deliquescence crystal. To α, β, γ three forms exist. Soluble in water, soluble in ethanol, ether, benzene, carbon disulfide and chloroform. Relative density of 1.580. Melting point 63 ° C (α type), 55 to 56 ° C (β type), 50 ° C (γ type). The boiling point of 189 ° C. Medium toxic, half lethal dose (rat, oral) 76mg / kg. Corrosive.

Chloroacetic acid use

Determination of zinc, calcium, silicon and titanium. Synthetic caffeine, epinephrine, aminoacetic acid, naphthalene acetic acid. Manufacture a variety of dyes. Rust Remover.

Monochloroacetic Acid For the preparation of pesticides and organic synthesis intermediates. Used as an acidizing agent for starch adhesives. Or intermediates for dyes, pharmaceuticals, pesticides, synthetic resins and other organic synthetic materials. The dye industry is used to produce indigo dyes. Chloroacetic acid is also an important carboxymethylating agent for the preparation of sodium carboxymethyl cellulose, ethylenediamine tetraacetic acid, etc., also used as non-ferrous metal flotation agent and chromatography reagent.

1 for the manufacture of carboxymethylcellulose (CMC).

2, in the pharmaceutical industry for the preparation of synthetic caffeine, epinephrine, amino acid, vitamin B6, chlortetracycline and other intermediates.

3, the pesticide industry for the preparation of dimethoate, naphthalene acetic acid, thiocyanate acetic acid, iszidate, herbicide 2,4D, herbicides and other intermediates.

4, the dye industry for the production of indigo and naphthylacetic acid dyes.

5, for the preparation of carboxymethyl cellulose and analytical chemical synthesis of intermediates.

Preparation: chlorine and acetic acid in the phosphorus, sulfur and other catalysts in the role of the system. It can also be prepared by trichlorethylene hydration or chloroethanol oxidation.

Chloroacetic acid Note:

① sodium acetate crystals easy to absorb moisture, the amount of drugs may be appropriate to increase.

② dust can also make saturated solution crystallization, so the flat bottom flask to be clean, bottle to cover the strict.

③ seed to small, crystal shape is better, so that crystal growth is slow, the phenomenon is clear.

Experimental Objective: To understand the supersaturated solution and supersaturated solution as saturated solution is stable.


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