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Croconic acid is used to prepare 1,3-bis-(2-dimethylamino-5-thienyl)croconine by reacting with dimethyl-thiophen-2-yl-amine. It is also used in organic synthesis and employed as a dye for biological research purposes. Further, it is involved in the preparation of ethers such as dimethyl croconate. In addition to this, it acts as a ligand and form coordination complexes with metals such as barium, copper, silver and lead.
Hooper, J.; Kunkel, D. A.; Zurek, E.; Enders, A. Interplay between Hydrogen Bonding, Epitaxy, and Charge Transfer in the Self-Assembly of Croconic Acid on Au(111) and Ag(111). J. Phys. Chem. C 2015, 119 (47), 26429-26437.
Mukhopadhyay, S.; Gutmann, M.; Alonso, F. F. Hydrogen-bond structure and anharmonicity in croconic acid. Phys. Chem. Chem. Phys. 2014, 16 (47), 26234-26239.
Gefahrenhinweise (EU): H315-H319-H335
Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Wear protective gloves. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.