Blue and red litmus paper and phenophthalein strips are mixed-indicator tests designed for fast, accurate, and reliable pH solution testing.

  • Instant pH readings
  • Mixed-indicator
  • Accurate for a wide range of routine pH testing
  • Convenient and portable for field use
  • Choice of blue and red litmus paper or phenophthalein strips
  • Color change in pH solutions ranging from approximately 5 to 8

Universal indicators

Cytiva's acid-alkali litmus paper is impregnated with a mixture of pH indicators. They assume a color specific to sample pH upon contact with a sample.

  • Red litmus paper turns blue in alkaline solutions
  • Blue litmus paper turns red in acidic solutions
  • Phenophthalein strips are colorless in acidic solutions and pink in basic solutions

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Product Product Name
Price
2600-202A Acid-Alkali Universal pH Indicator, Red Reel, 7 mm × 5 m Reel, litmus red 22.45 USD Add to cart

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2600-204A Acid-Alkali Universal pH Indicator, Phenolphthalein (100 pcs) Reel, phenophthalein 23.82 USD Add to cart

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2600-601 Acid-Alkali Universal pH Indicator, Blue Strip Book, 20 strips each (10 pcs) Litmus blue, 10 books of 20 strips 110.66 USD Add to cart

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2600-602 Acid-Alkali Universal pH Indicator, Red Strip Book, 20 strips each (10 pcs) Litmus red, 10 books of 20 strips 110.66 USD Add to cart

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10360300 Acid-Alkali Universal pH Indicator, Blue Strip (100 pcs) Strip, litmus blue 23.82 USD Add to cart

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2600-201A Acid-Alkali Universal pH Indicator, Blue Reel, 7 mm × 5 m Reel, litmus blue 23.82 USD Add to cart

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