Litmus Paper

United Scientific

Regular price $3.99

100 strips each in matching color plastic vials. Individual strips are approximately 2" long and 1/4" wide. Determines whether a substance is an acid or a base.

  • Blue litmus paper turns red at pH 4.5 or less (acidic).
  • Red litmus paper turns blue at pH 8.3 or more (basic).
  • Neutral litmus paper turns from purple to blue or red.