1. Some dyes such as indigo carmine may discolour the feces temporarily. 2. In obstetric surgery, indigo carmine solutions are sometimes employed to detect amniotic fluid leaks. 3. This reaction can be repeated many times, but it needs additional oxygen or indigo carmine . 4. Indigo carmine , or indigo, is an indigo derivative which is also used as a colorant.5. One of the early formulas consists of glucose, sodium hydroxide, indigo carmine , and water. 6. Treatment with sulfuric acid converts indigo into a blue-green derivative called indigo carmine ( sulfonated indigo ). 7. In urologic surgery, intravenous injection of indigo carmine is often used to highlight portions of the urinary tract. 8. The chief utility of indigo carmine is in the identification of dysplastic cells in individuals with chronic ulcerative colitis. 9. Substituted 2-nitrobenzaldehydes can also be used to yield other important compounds based on indigo, such as indigo carmine . 10. The primary contrast stain is indigo carmine , administered at varying concentrations between 0.1 % and 0.8 %.
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