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Sunderland Repository records the research produced by the University of Sunderland including practice-based research and theses.

Physical and chemical characterisation of thermosoftened bases for molten filled hard gelatin capsule formulations

Hawley, A.R., Rowley, G., Lough, John and Chatham, S.M. (1991) Physical and chemical characterisation of thermosoftened bases for molten filled hard gelatin capsule formulations. In: PharmTech Conference 1991, 1991, Bologna, Italy.

Item Type: Conference or Workshop Item (Paper)


Dynafill, Dynasan-114, Lutrol-F68, PEG-10000 and PEG-20000 have been examined as potential bases for the preparation of fusion formed solid dispersions for molten filling into hard gelatin capsules. Investigations included, an examination of thermal effects on crystal structure by DSC and XRD, a theological study to evaluate capsule filling characteristics, dissolution studies on drug/base formulations, chemical analysis for free fatty acid impurities in Dynafill and Dynasan-114, and detailed studies on selected drug/base formulations. PEG-20000 and Dynasan-114 were not examined in detail, after preliminary investigations had shown high viscosity and poor filling characteristics for PEG-20000 and poor dissolution characteristics for Dynasan-114. Dynafill provided good release profiles when formulated with a variety of model drugs (Acetohexamide, Ibuprofen, Indomethacin, Quinidine sulphate and Theophylline). Results from hot stage photomicrography supported by DSC and XRD were used to construct a phase diagram of the Ibuprofen/Lutrol-F68 system. The evidence from the phase diagram indicated the formulation of a simple eutectic system with no solid solubility and a eutectic composition at approximately 35% w/w Ibuprofen.

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Depositing User: Paula Normington


Item ID: 6398

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Catalogue record

Date Deposited: 13 Nov 2017 17:22
Last Modified: 18 Dec 2019 15:39


Author: A.R. Hawley
Author: G. Rowley
Author: John Lough
Author: S.M. Chatham

University Divisions

Faculty of Health Sciences and Wellbeing
Faculty of Health Sciences and Wellbeing > School of Pharmacy and Pharmaceutical Sciences



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