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.
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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.
Phenylketonuria

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