Bogen's Universal Indicator solution will change color over a pH range of 1 to 10. Just a few drops added to a liquid sample will indicate its pH according to the following “scale”:
pH 1.0 = Cherry Red
pH 2.0 = Rose
pH 3.0 = Reddish-Orange
pH 4.0 = Orange-Red
pH 5.0 = Orange
pH 6.0 = Yellow
pH 7.0 = Yellowish-Green
pH 8.0 = Green
pH 9.0 = Bluish-Green
pH 10.0 = Blue
This 4oz. bottle ships UPS Ground inside the USA only.