Alcian blue is the most specific stain showing acidic mucus substances. This cationic dye forms salt linkage with acidic groups. The different pH values of the stain liquid can be used to distinguish the mucous substance. When the pH is 1, the carboxyl group (-COOH) is not stained, and the sulfonic acid group (-SO3H) is stained. When the pH is 2.5, the carboxyl group stained well but the sulfuric acid mucus stained.
Product Advantages
a)Bright staining Color
b)No precipitates and insoluble substances in each component reagent; Great stability.