cas number glacial acetic acid

Glacial Acetic Acid An Overview

Glacial acetic acid, with the CAS number 64-19-7, is a colorless liquid organic compound that serves as a crucial chemical in industrial applications and laboratory settings. Renowned for its pungent odor and acidic taste, glacial acetic acid is a concentrated form of acetic acid. It contains about 99-100% acetic acid, distinguishing it from various commercial vinegar products, which usually contain around 4-8% acetic acid.

Properties and Characteristics

Glacial acetic acid has a boiling point of 118.1 °C (244.6 °F) and a melting point of 16.6 °C (61.88 °F). When it cools down, it can form solid crystalline structures, hence the term “glacial.” It is hygroscopic, meaning it can absorb moisture from the air, and it is miscible with water, ethanol, and many other organic solvents. Due to its corrosive nature, it is essential to handle glacial acetic acid with care, using appropriate protective equipment to avoid skin and eye contact.

The applications of glacial acetic acid are vast and varied. It is primarily used in the production of various chemicals, including acetate esters, acetic anhydride, and synthetic fibers such as rayon and cellulose acetate. The food industry also utilizes acetic acid as a preservative and flavoring agent, although in diluted forms. Furthermore, glacial acetic acid plays a pivotal role in the production of vinegar—culinary and industrial—through fermentation processes.

One of the significant uses of glacial acetic acid is in the manufacture of plastics and polymers. For instance, it is instrumental in producing polyvinyl acetate (PVA), a widely used adhesive in various industries. Additionally, acetic acid is utilized in the synthesis of various pharmaceuticals, including antibiotics and anti-inflammatory drugs.

Safety and Handling

Given its corrosive nature, glacial acetic acid poses several health risks. Exposure can cause severe burns, respiratory issues, and other health challenges if not handled properly. It is classified as a hazardous material, necessitating strict adherence to safety protocols during storage and usage. Proper ventilation, personal protective equipment (PPE), and safety data sheets (SDS) are essential when working with this substance.

Conclusion

In conclusion, glacial acetic acid is an essential compound in both industrial and laboratory environments. Its diverse applications range from chemical manufacturing to food preservation. As a highly concentrated acid, it must be handled with respect and care to ensure safety. Despite its potential hazards, the benefits and versatility of glacial acetic acid in modern technology and industry cannot be overstated. As research and development continue to evolve, this compound will likely remain a cornerstone in various chemical processes, reflecting the ongoing importance of acetic acid in our everyday lives.