Sentence Examples


  • A solution of the free acid may be prepared by adding oxalic acid to the solution of the sodium salt.
  • The salts of the acid, however, are stable, the sodium salt in particular being largely used for photographic purposes under the name of "hypo."
  • A sodium cobaltinitrite is also known.
  • 6-trichlor-5-methylpyrimidine by the action of sodium methylate.
  • It is formed by reducing diortho-dinitrodiphenyl with sodium amalgam and methyl alcohol, or by heating diphenylene-ortho-dihydrazine with hydrochloric acid to 150° C. It crystallizes in needles which melt at 156° C. Potassium permanganate oxidizes it to pyridazine tetracarboxylic acid.