litmus paper

litmus paper

  1. (chemistry) paper containing a water-soluble pH indicator composed of a mixture of different dyes extracted from certain lichens. The resulting piece of paper is used to test materials for acidity, turning red when acidic and blue when alkaline.
  • French: papier de tournesol
  • German: Lackmuspapier
  • Italian: cartina tornasole
  • Portuguese: papel de tornassol
  • Russian: ла́кмусовая бума́га
  • Spanish: papel de tornasol

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