Do you know the acidity and alkalinity of substances? This pH strip is a measurement of the level of acid or alkali in a solution or substance. It turns red when it touches an acid and blue when it touches an alkali. In the pH range of 1 to 14 a reading of below 7 shows an acid and of above 7 shows an alkali, 7 is neutral. ✿ Ideal for Scientific Enlightenment: The acid-base test paper turns red when it touches an acid and blue when it touches an alkali. It is very suitable for teaching and daily use. It is not only a pH monitoring tool, but also an interesting scientific enlightenment prop. ✿ Note: This test universal indicator paper pH1-14 is not suitable for solutions with concentrations below 0.01%. ✿ Tips for Storage: The pH 1-14 test paper for urine, saliva and drinking water needs to be stored in a dry place away from light. Specification Material: Litmus paper Color: Yellow Size: 5x1cm (2x0.4in) Package Contents: 3 Packs of 240 pH Test Strips
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