Journal
JOURNAL OF PHARMACEUTICAL SCIENCES
Volume 98, Issue 7, Pages 2448-2463Publisher
ELSEVIER SCIENCE INC
DOI: 10.1002/jps.21626
Keywords
conformational analysis; indomethacin; polymorph; quenching; amorphous; solubility
Funding
- PAPIME [PE201905, PE101907]
- PACIVE: VIASC-103
- CONACYT-Mexico
- PACIVE CONS-101
- Catedras de Investigation: IN1-13
- FESC-UNAM
Ask authors/readers for more resources
Thermal analysis of indomethacin alpha and gamma polymorphs presents a temperature transition at 429.2 and 435.8 K, respectively, although with X-ray diffraction or near infra-red spectroscopy phase transformations were not registered. DSC method for the indomethacin amorphous solid shows an endothermic event; however, the conformational analysis at higher temperature shows a rotational change which may explain such endothermic peak. By heating they polymorph at 483 K (210 degrees C) for 30 min and then quenching into liquid nitrogen the amorphous solid was obtained. The a form shows the highest intrinsic dissolution rate, while the lowest rate was for the amorphous indomethacin. Theoretical calculations (ab initio, Hartree-Fock and density functional theory, DFT) indicate that the double interaction is responsible for the observed difference in solubility. (C) 2009 Wiley-Liss, Inc. and the American Pharmacists Association J Pharm Sci 98:2448-2463, 2009
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available