noun (Pharmaceutical: Excipients) Acetonitrile is a colorless liquid which smells like ether and is used as an extractant (= a liquid used to obtain a substance from another liquid), solvent, and intermediate (= a substance that is formed in one stage of a synthesis, and used in the next stage). ⇒ The colorless solvent acetonitrile mixes well with water and alcohol. ⇒ We tested propanol, methanol, and acetonitrile to find the most suitable solvent for the extraction of unsaturated hydrocarbons. ⇒ Acetonitrile is a colorless liquid which smells like ether and is used as an extractant, solvent, and intermediate.
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