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
10360300 Acid-Alkali Universal pH Indicator, Blue Strip (100 pcs) Strip, litmus blue 23.13 USD Add to cart

In Stock Stock on request Limited stock

2600-201A Acid-Alkali Universal pH Indicator, Blue Reel, 7 mm × 5 m Reel, litmus blue 23.13 USD Add to cart

In Stock Stock on request Limited stock

2600-204A Acid-Alkali Universal pH Indicator, Phenolphthalein (100 pcs) Reel, phenophthalein 23.13 USD Add to cart

In Stock Stock on request Limited stock

2600-202A Acid-Alkali Universal pH Indicator, Red Reel, 7 mm × 5 m Reel, litmus red 21.80 USD Add to cart

In Stock Stock on request Limited stock

2600-601 Acid-Alkali Universal pH Indicator, Blue Strip Book, 20 strips each (10 pcs) Litmus blue, 10 books of 20 strips 107.44 USD Add to cart

In Stock Stock on request Limited stock

2600-602 Acid-Alkali Universal pH Indicator, Red Strip Book, 20 strips each (10 pcs) Litmus red, 10 books of 20 strips 107.44 USD Add to cart

In Stock Stock on request Limited stock

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