A rectified spirit, rectified alcohol, or neutral spirit is highly concentrated ethanol which has been purified by means of repeated distillation, a process that is called rectification. It typically contains 95% alcohol by volume (ABV). Rectified spirits are used in mixed drinks, in the production of liqueurs, for medicinal purposes, and as a household solvent.
The purity of rectified spirit has a practical limit of 95.6% ABV (191.2 US proof) when produced using conventional distillation processes, because a mixture of ethanol and water becomes an azeotrope at this concentration.
Neutral grain spirits are rectified spirits made from grain. However, rectified spirits are also made from other kinds of plant material, such as sugar beets, potatoes, and sugar cane. Rectified spirits are illegal for nonmedical purposes in some nations (including India), and were banned until recently in Canada, but they are legal in most Western nations.
Read more about Rectified Spirit: United States, Poland, Germany
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—Mark Twain [Samuel Langhorne Clemens] (1835–1910)