perchloric acid in glacial acetic acid_

why is pure acetic acid known as glacial

Glacial acetic acid has several unique properties due to its high purity. It has a low melting point (16.7°C or 62.1°F), which is lower than that of water, another characteristic that contributes to the ice-like appearance when it transitions from liquid to solid. Its high acidity, strong smell, and ability to dissolve many substances make it valuable in various industrial applications, including the production of vinegar, dyes, pharmaceuticals, plastics, and even in the purification of gold and silver.

Conclusion

Food grade acetic acid, commonly referred to as food additive E260, is a highly versatile and useful component in the food and drink industry being a key ingredient in the production of fermented food and drinks such as vinegar, kombucha and Lambic beer. It also possesses excellent food preservation properties helping to inhibit the growth of bacteria.
 
Other uses of acetic acid in food include as a pH adjuster to increase the acidity of certain drinks and as a flavour enhancer where it imparts a sharp, sour taste.

Glacial Acetic Acid Producers and Their Impact on Industry Growth and Sustainability Practices

Environmental and Safety Considerations