Patents Assigned to EPROVA AKTIENGESELLSCGAFT
  • Stable crystalline (6R) -tetrahydrofolic acid
    Publication number: 20010002398
    Abstract: Pure and extremely stable crystalline (6S)- and (6R)-tetrahydrofolic acids, absolutely inert even when exposed to air and elevated temperature without stabilizers being added, are prepared by a crystallization process at a pH of ≧3.5 for the preparation of crystalline (6S)-tetrahydrofolic acid and at a pH of ≧2 for the preparation of crystalline (6R)-tetrahydrofolic acid.
    Type: Application
    Filed: January 8, 2001
    Publication date: May 31, 2001
    Applicant: EPROVA AKTIENGESELLSCGAFT
    Inventors: Hans Rudolf Muller, Martin Ulmann, Rudolf Moser, Thomas Ammann