Nitrazine

Use

• This test is done to ascertain the nature of fluid in the vagina during pregnancy especially when premature rupture of membranes is suspect, however it is not recommended as it poses risk to infant mortality, many countries, such as the UK, are banning the use of nitrazine for such purposes.
• This test involves putting a drop of fluid obtained from the vagina onto paper strips containing nitrazine dye. The strips change color depending on the pH of the fluid. The strips will turn blue if the pH is greater than 6.0. A blue strip means it's more likely the membranes have ruptured.

• To perform a fecal pH test for diagnosing intestinal infections or other digestive problems
• In civil engineering, to determine the carbonatation spread in concrete structures and therefore assess the state of the rebar's passivation film.