Plural of chloroform; multiple instances or types of the colorless volatile liquid used as an anesthetic and solvent.
From chloro- (Greek chloros 'greenish-yellow' + Latin formyl) + -s plural marker. The singular chloroform was coined in 1831 and quickly became a dominant chemical name.
Different chloroforms can have varying purity levels and properties—industrial versus pharmaceutical-grade chloroforms behave differently because of trace contaminants, which was a major problem before modern chemical standards were established.
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