cas number glacial acetic acid

Understanding Glacial Acetic Acid CAS Number and Its Applications

Glacial acetic acid, known for its unique properties, is a vital chemical-reagent used in various industrial applications. With the Chemical Abstracts Service (CAS) number 64-19-7, it is widely recognized in the chemical community. This article delves into the significance of glacial acetic acid, its uses, safety measures, and the importance of its CAS number in chemical identification.

What is Glacial Acetic Acid?

Glacial acetic acid is a colorless liquid organic compound with a distinct pungent smell, often described as vinegar-like. It is a highly concentrated form of acetic acid, containing at least 99% acetic acid by volume. The term glacial refers to its ability to form ice-like crystals at temperatures slightly above 16.6 degrees Celsius (62 degrees Fahrenheit). This property, along with its high purity, distinguishes it from the more diluted version found in household vinegar.

Chemical Properties

The molecular formula for glacial acetic acid is C2H4O2. It is classified as a carboxylic acid, exhibiting both acidic and slightly polar characteristics. Its high acidity allows it to donate protons (H⁺ ions), making it an effective solvent and reagent in various chemical reactions. Glacial acetic acid is miscible with water, ethanol, and ether, further broadening its application range in chemical synthesis and manufacturing.

Industrial Applications

1. Chemical Synthesis Glacial acetic acid is an essential precursor for producing various chemicals. It serves as a key raw material in the synthesis of acetates, which are used in the manufacture of plastics, solvents, and fibers. For instance, cellulose acetate, derived from acetic acid, is a significant component in the production of photographic film and textiles.

2. Food Industry Though less common than its diluted counterpart, glacial acetic acid is utilized in food processing as a preservative and flavoring agent. It can inhibit microbial growth, thus prolonging the shelf life of certain food products.

3. Pharmaceuticals In the pharmaceutical industry, glacial acetic acid plays a crucial role in the synthesis of various medicinal compounds. It is involved in the manufacture of pain relievers, anti-inflammatory drugs, and even certain antibiotics.

4. Laboratory Reagent As a laboratory reagent, glacial acetic acid is essential for various analytical procedures. It's utilized in titrations, particularly when determining acidity levels in different solutions.

5. Textile and Leather Industries Glacial acetic acid is used in dyeing processes and as a pH modifier in textile manufacturing. Additionally, it is instrumental in the tanning process within the leather industry.

Safety Measures

Despite its widespread application, glacial acetic acid poses certain health risks that necessitate strict safety measures. It is classified as a hazardous substance due to its corrosive properties, which can cause skin burns, eye damage, and respiratory issues upon exposure. Therefore, proper personal protective equipment (PPE) such as gloves, goggles, and respiratory masks should be worn when handling this chemical.

Moreover, since glacial acetic acid can vaporize and form acetic acid vapors, it is crucial to work in well-ventilated areas to minimize inhalation risks. In case of accidental spills, appropriate protocols must be followed immediately to contain and neutralize the substance.

The Importance of CAS Numbers

The CAS number, a unique numerical identifier for chemical substances, plays a fundamental role in ensuring clarity and standardization within the scientific community. For glacial acetic acid, the CAS number 64-19-7 aids researchers, manufacturers, and regulatory bodies in identifying and cataloging the chemical unambiguously. This facilitates communication across industries, streamlines the procurement process, and enhances regulatory compliance in various applications.

Conclusion

Glacial acetic acid, identified by its CAS number 64-19-7, is an indispensable chemical in multiple sectors. Its unique properties, industrial relevance, and safety considerations underline the importance of understanding and handling this compound with care. Whether in pharmaceuticals, food processing, or textile manufacturing, glacial acetic acid continues to play a pivotal role in advancing various chemical applications while emphasizing safety and regulatory compliance. As we delve further into chemistry's complexities, acknowledging the significance of such compounds will remain paramount in driving innovation and ensuring safety in chemical practices.