Substance that turns litmus paper red Crossword Clue

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Here is the answer for the crossword clue Substance that turns litmus paper red last seen in USA Today puzzle. We have found 40 possible answers for this clue in our database. Among them, one solution stands out with a 98% match which has a length of 4 letters. We think the likely answer to this clue is ACID.

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Crossword Answer For Substance that turns litmus paper red:

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40 Potential Answers:

RankAnswerLengthSourceDate
98% ACID Substance that turns litmus paper red (4) USA Today Dec 23, 2021
45% ACIDS Chemical substances that turn litmus paper red (5)
4% ALKALI Substance that turns litmus paper blue (6) (6) Puzzler Apr 23, 2026
4% ACIDIC ____ substances turn litmus paper red (6) The Times Specialist Sunday May 20, 2018
3% SEETHE Turn red (6) Newsday Jun 13, 2026
3% IRRITATE Turn red (8) Newsday Jun 13, 2026
3% MEI "Turning Red" protagonist (3) USA Today Jun 10, 2026
3% DYES Turns a bright shade of red? (4) The Atlantic May 12, 2026
3% DYE Turn red? (3) The Atlantic Apr 2, 2026
3% BASES They turn red litmus paper blue (5) New York Times Dec 14, 2025

Last appeared together with the following clues in USA Today puzzle

Substance that turns litmus paper red Crossword Clue
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An acid is a substance that, when dissolved in water, releases hydrogen ions. Litmus paper turns red in the presence of acids due to the change in pH. Acids are common in everyday items like citrus fruits and vinegar.