Pocket sized vials for pH testing.

• Paper strips are 2" in length, 0.25" in width
• Packaged in plastic vials
• 100 paper strips per vial

Red litmus paper will turn blue when it comes into contact with an alkaline solution. Blue litmus paper will turn red or pink when it comes in contact with an acidic solution. Neutral litmus paper turns red in an acid solution and blue in a base solution.