Grünenthal prohibited the research and manufacture of penicillin by German companies. When the ban was lifted, Grünenthal was the first company to introduce penicillin in the postwar period into the German market. This investment achieved a big financial boost for the company. Chemie Grünenthal synthesized thalidomide in 1954 and acquired a 20-year patent. Soon after obtaining a patent in April 1954, the company started clinical trials, and as early as November 1956, marketed the drug for the treatment of respiratory infections under the trade name Grippex, a combination drug that contained thalidomide, quinine, vitamin C, phenacetin, and acetylsalicylic acid. Researchers at
Phosphoric acid Phosphoric acid Phosphoric acid (also known as orthophosphoric acid or phosphoric(V) acid) is a weak acid with the chemical formula HPO. Orthophosphoric acid refers to "phosphoric acid", which is the IUPAC name for this compound. The prefix "ortho-" is used to distinguish the acid from related phosphoric acids, called polyphosphoric acids. Orthophosphoric acid is a non-toxic acid, which, when pure, is a solid at room temperature and pressure. The conjugate base of phosphoric acid is the dihydrogen phosphate ion, , which in turn has a conjugate base of hydrogen phosphate, , which has a conjugate base of phosphate, . Phosphates