Diatrizoic acid is an iodinated radiocontrast agent. In Vivo: Diatrizoic acid is an iodinated radiocontrast agent. Histological examination of rat lung tissue shows no acute toxicity or inflammation after insufflation of Diatrizoic acid nanoparticle agglomerates. Diatrizoic acid nanoparticle agglomerates offers a promising radiocontrast agent for safe and effective lung visualization^[1].