Analytical Reagents Organic Dyes, Stains and Indicators Dyes, Stains and Indicators 2081 METHYLENE BLUE SOLUTION METHYLENE BLUE SOLUTION 0.05% AQUEOUS C16H18N3ClS•3H2O 373.91 7220,79,3 7220793 79,3 722079,3 7220 79 3 NR 1.000 24801 23.80 500 ML Suitability as indicator Pass Test