5,8,11,14-Tetraoxa-2-azahexadecanedioic acid is a specialty chemical intermediate characterized by a dicarboxylic acid structure incorporating multiple ether (tetraoxa) and aza linkages in a 16-carbon chain. It appears as a colorless to light yellow viscous liquid with a purity of 98%, confirmed by infrared spectrum, NMR, and structural conformity tests. This compound is used in advanced organic synthesis, particularly for pharmaceuticals, polymers, and niche additives.