S 2529 (OTTO) Stannous oxalate, 98% Cas 814-94-8 - used for dyeing and printing textiles. It acts as a catalyst for the esterification reactions between long chain fatty acids and alcohols and in polymerization reactions. S 2529 (OTTO) Stannous oxalate, 98% Cas 814-94-8 - used in stannous oral care compositions. S 2529 (OTTO) Stannous oxalate, 98% Cas 814-94-8 - - used in proteomics research.