Crystalline forms of imidoalkanpercarboxylic acids

Details Crystalline forms of imidoalkanpercarboxylic acids Crystalline forms of imidoalkanpercarboxylic acids

C - Chemistry, Metallurgy

07

D

C07D 209/48 (2006.01) A01N 43/38 (2006.01) C07D 205/02 (2006.01) C11D 3/28 (2006.01) C11D 3/39 (2006.01) C11D 7/32 (2006.01)

Patent

CA 2492263

.epsilon.-phthalimido-peroxyhexanoic acid in a crystalline form, herein called alpha, stable at storage at the solid state, but when dispersed in water transformed into crystals of the known crystalline form, herein called beta, stable in aqueous environment, said crystals of beta crystalline form having average sizes lower than 30 microns, said alpha crystalline form being characterized with respect to the known beta crystalline form by the following chemico-physical parameters: - at X rays: peaks at 17.5 and 19.0 and quadruplet at 24.2 -25.0 [°2.theta.], - at IR/S spectrum: peak with maximum absorption in the 1707 - 1712 cm-1 zone, for anhydrous crystals, having a water absorption at 3450 - 3500 cm-1 lower than 5%. Also, the invention relates to compositions of .epsilon.-phthalimido- peroxyhexanoic acid, process of preparation of said E-phthalimido-peroxyhexanoic acid and use of said .epsilon.--phthalimido-peroxyhexanoic acid, especially in bleach or disinfection applications.

L'invention concerne des acides imidoalkancarboxyliques représentés par la formule (I), dans laquelle A, X et M sont définis dans l'application. Ces acides qui se présentent sous forme cristalline font croître des cristaux de taille inférieure à 30 microns lorsqu'ils sont en contact avec de l'eau.

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