Accutest 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. It is widely used in hospitals & 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 pH Nitrazine Indicator Paper provides approximately 100 tests. Features & Benefits: The economical alternative to higher priced nitrazine papers; Test papers give instant, easy-to-read results, with clear, bright matches at 0.5 intervals from pH 4.5 to 7.5; Color charts are lab-tested for precision accuracy; Made in the U.S.A. with state-of-the-art materials; An FDA-listed medical test product, used in hospitals & doctors offices.