pH Indicators
A pH indicator is a halochromic compound added in small amounts to a solution to allow a visual measurement of the pH (acidity or basicity) of the solution.

PHBOOK-114
Accurately test acidity with universal and special range ph paper.
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From $1.99 /unit
Ph Paper Book, Universal And Special Ranges 1-14
Accurately test acidity with universal and special range ph paper.
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