chemical substance

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chemical substance

Pharmacology Any substance including alcohol, drugs, or medications–eg, those taken pursuant to a valid prescription for legitimate medical purposes, and in accordance with the prescriber's direction, as well as those taken illegally. See Substance abuse.
References in periodicals archive ?
After separation, pure substances from the ether solution exit the GC column one by one and enter a mass spectrometer.
Suitability for collecting chromatographic fractions (= pure substances or partially purified chemical compounds from mixtures of substances).
In particular, surface properties and pure substances of imported products are closely monitored.
The instruments allow users to quickly identify unknown chemicals from a vast sample library of more than 10,000 pure substances including: explosives, toxic industrial chemicals (TICs), toxic industrial materials (TIMs), chemical warfare agents (CWAs), white powders, narcotics, precursors and more.
into pure substances, and changes substances that are prohibited into lawful and permissible substances.