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Polyphosphoric acid is used as a dehydrating agent, cyclizing agent, acylating agent, analytical reagent and as a ring closing reagent. It is used in the production of phosphate esters, acid phosphates and pharmaceuticals. It is involved in metal treatment and as an asphalt and a bitumen additive. Furthermore, it is employed for the determination of tryptophan and used a reagent for the alkylation and acylation reactions of aromatic and alkenic compounds.
Promotes the rearrangement of 1-arylindoles to 5H-dibenzo[b,f]azepines: Tetrahedron, 51, 2091 (1995).
Niemczak, M.; Czerniak, K.; Kopczyński, T. Preparation of 1-methyl-3-phenylisoquinoline derivatives from oximes using polyphosphoric esters. New J. Chem. 2015, 39 (3), 1868-1873.
Xiao, D.; Pan, R.; Li, S.; He, J.; Qi, M.; Kong, S.; Gu, Y.; Lin, R.; He, H. Porous carbon quantum dots: one step green synthesis via L-cysteine and applications in metal ion detection. RSC Adv. 2015, 5 (3), 2039-2046.
Dichiarazioni di rischio (UE): H314-H318
Causes severe skin burns and eye damage. Causes serious eye damage.
Dichiarazioni precauzionali: P280-P303+P361+P353-P305+P351+P338-P310a
Wear protective gloves/protective clothing/eye protection/face protection. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.