18.
    发明专利
    未知

    公开(公告)号:DE19842914A1

    公开(公告)日:2000-03-23

    申请号:DE19842914

    申请日:1998-09-18

    Applicant: BASF AG

    Abstract: 1,3-Bis(pyrrolidon-1-yl) butane (I) is used as a dispersant or solvent in a test system for characterising the compatibiity of biologically active substances with polyvinylpyrrolidone (PVP) in a solid dispersion. Independent claims are also included for the following: (1) a test system for characterising the compatibility of biologically active substances with PVP in a solid dispersion, consisting of one or more biologically active substances and (I); (2) a method for characterising the compatibility of biologically active substances with PVP in a solid dispersion, comprising dissolving or dispersing one or more biologically active substances in (I) and spectroscopically evaluating the solution or dispersion.

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