Ehrlich benzaldehyde reaction

Ehr·lich benz·al·de·hyde re·ac·tion

(ār'lik),
a test for urobilinogen in the urine by dissolving 2 g of dimethyl-p-aminobenzaldehyde in 100 mL of 5% hydrochloric acid and adding this reagent to urine; a red color in the cold indicates the presence of an excessive amount of urobilinogen.

Ehr·lich benz·al·de·hyde re·ac·tion

(ār'lik benz-al'dĕ-hīd rē-ak'shŭn)
A test for urobilinogen in the urine, by dissolving 2 g of dimethyl-p-aminobenzaldehyde in 100 mL of 5% hydrochloric acid and adding this reagent to urine; a red color in cold temperatures indicates the presence of an excessive amount of urobilinogen.