P 1940 (OTTO) Platinum acetyl acetonate, 97% Cas 15170-57-7 - used with disodium iron tetracarbonyl to form FePt superlattice magnetic nanoparticles in high-boiling hydrocarbon solvents. P 1940 (OTTO) Platinum acetyl acetonate, 97% Cas 15170-57-7 - used with disodium iron tetracarbonyl to form FePt superlattice magnetic nanoparticles in high-boiling hydrocarbon solvents.