para nitro phenols

para-nitrophenol

[par-uh-nahy-truh-fee-nawl, -nol]
noun
See under nitrophenol ( def 2 ).
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nitrophenol

[nahy-truh-fee-nawl, -nol]
noun Chemistry.
1.
any compound derived from phenol by the replacement of one or more of its ring hydrogen atoms by the nitro group.
2.
any of three water-soluble, crystalline isomers of such a derivative, having the formula C 6 H 5 NO 3 , occurring in yellow (ortho-nitrophenol) pale-yellow (meta-nitrophenol) and yellowish (para-nitrophenol) solids, used chiefly as intermediates in organic synthesis and as indicators.

Origin:
1850–55; nitro- + phenol

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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