Abstract Using synthetic, chromatographic and spectral methods, we studied the side reactions accompanying the preparation of di-2-ethylhexyl phthalate from phthalic anhydride and 2-ethyl-hexane-1-ol in the presence of catalytic amounts of tetra-n-butyl titanate. The catalyst proper was titanium (IV) mono-2-ethylhexyl phthalate. The possibility of a simultaneous gas-chromatographic quantitative determination of mono-2-ethylhexyl ...