Blue Litmus pH Test Paper for Acid Detection

Blue Litmus Paper is an acid indicator used for pH testing within the 4.3 to 6.8 range. Each vial contains 100 test strips, with each strip measuring approximately 0.25" x 1.75". When dipped into an acidic solution with a pH lower than 7, the blue paper turns red or pink, providing a quick visual confirmation of acidity. This indicator paper is a standard tool in science classrooms and laboratories for basic acid-base testing. The compact vial format keeps strips dry and accessible for repeated use throughout experiments and demonstrations.