Cytiva
Cytiva - Model Acid-Alkali -pH Indicators
FromCytiva
Blue and red litmus paper and phenophthalein strips are mixed-indicator tests designed for fast, accurate, and reliable pH solution testing.
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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