Stabilisation of metastable polymorphs: the case of paracetamol form III.

نویسندگان

  • Richard Telford
  • Colin C Seaton
  • Alexander Clout
  • Asma Buanz
  • Simon Gaisford
  • Gareth R Williams
  • Timothy J Prior
  • Chidera H Okoye
  • Tasnim Munshi
  • Ian J Scowen
چکیده

The design of a melt synthesis of the first air-stable formulation of the metastable form III of paracetamol is derived from thermo-spectroscopic and thermo-diffraction experiments. Melt crystallisation in the presence of β-1,4-saccharides produces form III selectively and the excipients appear to act as stabilising 'active' templates of the metastable polymorph.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Crystallization of Metastable Orthorhombic Paracetamol by Specially Designed Seeding Technique

Elusive metastable orthorhombic paracetamol single crystals were obtained by specially designed seeding technique from conventional slow evaporation method. Seeds were prepared at optimized conditions under different cooling rates from seed preparation unit and Powder x-ray diffraction (PXRD) was performed to ensure the polymorphic form of seeds. Saturated paracetamol solutions with three diffe...

متن کامل

Characterizing the Carbamazepine Polymorphs, Solubility and Metastable Zone Measurement

Introduction Polymorphism is a phenomenon related to the crystallized solid state which is problematic for many industries. A successful industrial crystallization typically requires the development of a robust process in the laboratory including the knowledge of the solubility curve and the stability of the solution in the vicinity of the equilibrium point, as indicated by the metastable zone ...

متن کامل

Surface Mediated Structures: Stabilization of Metastable Polymorphs on the Example of Paracetamol

The preparation of typically thermodynamically unstable polymorphic structures is a challenge. However, solid surfaces are well established aids for the formation and stabilization of polymorphic structures within, for instance, organic electronics. In this study, we report the stabilization of a pharmaceutically relevant substance via a solid surface at ambient conditions. Form III of paraceta...

متن کامل

Polymorph selection in 2D crystals by phase transition blocking.

A phase transition between two-dimensional polymorphs of the buckybowl corannulene on a Cu(111) surface can be suppressed by spatial confinement, allowing stabilisation of the metastable polymorph over the stable one.

متن کامل

The Pressure-Temperature Phase Diagram of Metacetamol and Its Comparison to the Phase Diagram of Paracetamol.

Understanding the polymorphic behavior of active pharmaceutical ingredients is important for formulation purposes and regulatory reasons. Metacetamol is an isomer of paracetamol and it similarly exhibits polymorphism. In the present article, it has been found that one of the polymorphs of metacetamol is only stable under increased pressure, which has led to the conclusion that metacetamol like ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Chemical communications

دوره 52 81  شماره 

صفحات  -

تاریخ انتشار 2016