Accutest® Nitrazine Indicator Paper in Dispenser 4.5 to 7.5 (1236573_BX) 10/BXAccutest brand nitrazine indicator paper is the economical choice among FDA listed medical pH test products for the in vitro determination of body fluid pH in the 4. 57. 5 range Widely used in hospitals and doctors' offices to detect the presence of amniotic fluid in vaginal secretions during late term pregnancy, a sign of premature amniotic sac rupture Packaged in a convenient, easy to use dispenser, complete with color chart, each roll of Accutest