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Fouchets Reagent has been formulated using precise amounts of trichloroacetic acid and 10% ferric chloride solution. It is used for detection of bile in urine by oxidation method. This reagent works by oxidizing bilirubin that has been precipitated by barium chloride. Positive test produces green color after test completion. Fouchets Reagent appears as clear yellow colored solution that must be stored at temperature between 10 to 30 degrees Celsius. The green colored compound formed by this reagent in presence of TCA is known as biliverdin.