Congo Red Test Paper The Congo Red test paper is used to test narrow-range acidic solutions. Used in acid washes for metal plating where pH values are very low (pH 1.0-3.0). The Congo Red indicator remains blue below pH 3.0, then gradually turns bright brilliant red above pH 5.2.

Reviews (0)


There are no reviews yet.

Be the first to review “CONGO RED PAPER”

Your email address will not be published.