absolute alcohol Meaning

Absolute Alcohol

Definition: Absolute alcohol refers to ethyl alcohol (ethanol) that has been purified to contain a minimum of 99% v/v (volume/volume) ethanol. It is known as anhydrous ethanol because it contains very little or no water. Absolute alcohol is commonly used in laboratories, in the production of pharmaceuticals, and in various industrial applications.

Usage: Absolute alcohol is used primarily as a solvent for chemicals, for the dilution of substances in analytical chemistry, and as a preservative. It is also employed in the manufacture of perfumes, cosmetics, and as a means of cleaning and disinfecting equipment.

Etymology: The term “absolute” in this context denotes the purity or completeness of ethanol in the composition, signifying that it does not contain any water. The word “alcohol” has its roots in Arabic “al-kuḥl,” which originally referred to a powder used for eyeliner and was later adopted in the European lexicon to refer to distillates and eventually to ethanol.

Pronunciation: /ˈæbsəˌlut ˈæl.kə.hɔl/ or /ˈæb.sə.luːt ˈæl.kə.hɒl/

Synonyms:

• Ethanol
• Anhydrous alcohol
• Pure alcohol

Antonyms:

• Dilute alcohol
• Ethanol solution (lower concentration)
• Fermented liquor (alcohol in a solution with water and other compounds)

Additional Notes:

• Safety and Handling: Absolute alcohol is flammable and toxic, and it must be handled with care, using appropriate laboratory safety protocols.
• Regulations: Due to its high concentration of ethanol, it is subject to various regulations and may require permits for purchase and use in certain jurisdictions.
• Applications in Research: In scientific research, absolute alcohol is often used in the preparation of samples, extraction of compounds, and for the preservation of biological specimens.