Phenistix

Phenistix

 [fen´ĭ-stiks]
trademark for a reagent strip impregnated with ferric chloride and glacial acetic acid; used in screening tests for phenylketonuria and in detection of salicylates and chlorpromazine in the urine.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
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Phenistix reagent strips contain ferric ammonium sulfate, magnesium sulfate, and cyclohexylsulfamic acid.
10 When a Phenistix is dipped into a young child's urine, a purple color develops.