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    Effect of cocrystallization techniques on compressional properties of caffeine/oxalic acid 2:1 cocrystal

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    Publication date
    2013
    Author
    Aher, Suyog
    Dhumal, Ravindra S.
    Mahadik, K.R.
    Ketolainen, J.
    Paradkar, Anant R.
    Keyword
    Caffeine
    ; Chemical precipitation
    ; Crystallisation
    ; Drug compounding
    ; Elasticity
    ; Microscopy
    ; Oxalic acid
    ; Solvents
    ; Surface properties
    ; Tablets
    ; Ultrasonography
    ; X-Ray diffraction
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    Peer-Reviewed
    Yes
    
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    Abstract
    Caffeine/oxalic acid 2:1 cocrystal exhibited superior stability to humidity over caffeine, but compressional behavior is not studied yet. To compare compressional properties of caffeine/oxalic acid 2:1 cocrystal obtained by different cocrystallization techniques. Cocrystal was obtained by solvent precipitation and ultrasound assisted solution cocrystallization (USSC) and characterized by X-ray powder diffraction and scanning electron microscopy. Compaction study was carried out at different compaction forces. Compact crushing strength, thickness and elastic recovery were determined. Compaction was in order, caffeine > solvent precipitation cocrystal > USSC cocrystal. Caffeine exhibited sticking and lamination, where solvent precipitation compacts showed advantage. Caffeine and solvent precipitation compacts showed sudden drop in compactability, higher elastic recovery with severe lamination at 20,000 N. This was due to overcompaction. Crystal habit of two cocrystal products was same, but USSC cocrystals were difficult to compact. Uniform needle shaped USSC cocrystals must be difficult to orient in different direction and fracture during compression. Elastic recovery of USSC cocrystals was also more compared to other powders indicating less fracture and poor bonding between particles resulting in poor compaction. Cocrystal formation did not improve compressional property of caffeine. Cocrystals exposed to different crystallization environments in two techniques may have resulted in generation of different surface properties presenting different compressional properties.
    URI
    http://hdl.handle.net/10454/10107
    Version
    No full-text available in the repository
    Citation
    Aher S, Shumal R, Mahadik K et al (2013) Effect of cocrystallization techniques on compressional properties of caffeine/oxalic acid 2:1 cocrystal. Pharmaceutical Development and Technology. 18(1): 55-60.
    Link to publisher’s version
    http://dx.doi.org/10.3109/10837450.2011.618950
    Type
    Article
    Collections
    Life Sciences Publications

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