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Glacial Acetic Acid

Issuing time:2020-06-16 15:56


Glacial acetic acid (pure substance), namely anhydrous acetic acid, acetic acid is one of the important organic acids and organic compounds. It solidifies into ice shape at low temperature, commonly known as glacial acetic acid. The expansion of volume during solidification may cause the container to break. The flash point is 39 ℃, the explosion limit is 4.0% - 16.0%, and the maximum allowable concentration in the air is not more than 25mg / m3. Pure acetic acid will freeze into ice crystal when it is lower than the melting point, so anhydrous acetic acid is also called glacial acetic acid.

Uses: mainly used in the synthesis of vinyl acetate, acetate fiber, acetic anhydride, acetate, metal acetate and haloacetic acid. It is also an important raw material for pharmaceutical, dyestuff, pesticide and other organic synthesis. In addition, it also has a wide range of applications in the fields of photographic medicine manufacturing, cellulose acetate, textile printing and dyeing, rubber industry, etc., solvents for manufacturing plastics and dyes, photography, medicine, pesticides and other organic synthetic raw materials.

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Acetic acid, about 30%, is liquid at room temperature. The content of glacial acetic acid is more than 98%, which can be regarded as pure acetic acid. This kind of acetic acid is liquid when it is higher than 14 ℃. It is solid when it is lower than 14 ℃. Its appearance is very similar to ice, so it is called glacial acetic acid. Even if there is no freezing weather in the north, we should pay attention to antifreeze.

The vinegar we eat contains about 3% acetic acid, and white vinegar is made by mixing with acetic acid. It has enough acidity and poor taste. However, there are many flavor substances in brewing vinegar, which has a good taste.

The freezing point of glacial acetic acid should be 16.6 degrees, and the solid state is below 16 degrees, just like the ice formed by water.

Standard description this standard is applicable to industrial glacial acetic acid prepared from acetylene, ethanol and ethylene; it is also applicable to industrial glacial acetic acid produced by the CO oxidation of trioxaldehyde and xylene.

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