Ammonium sulfate is added to a red colored urine.The urine had a positive reaction for blood,but there were no red blood cells in the sediment.After centrifugation,the sedimented ammonium sulfate is red.The abnormal color is caused by:

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Quizplus · Accepted Answer

The red color in the urine is due to hemoglobin. When ammonium sulfate is added, hemoglobin precipitates, causing the sediment to be red. This indicates the presence of hemoglobinuria, not myoglobinuria, as myoglobin would not precipitate with ammonium sulfate.

Ammonium Sulfate Is Added to a Red Colored Urine