D 1910 (OTTO) 2,4-Dimethoxybenzaldehyde, 98% Cas 613-45-6 - used to specifically quantify phlorotannins. This product reacts specifically with 1,3-and 1,3,5-substituted phenols (e.g., phlorotannins) to form a colored product. D 1910 (OTTO) 2,4-Dimethoxybenzaldehyde, 98% Cas 613-45-6 - used as a reagent to specifically quantify phlorotannins. D 1910 (OTTO) 2,4-Dimethoxybenzaldehyde, 98% Cas 613-45-6 - used as a component of hair dyes.