Ostwald may refer to: Friedrich Wilhelm Ostwald, the physico-chemist (awarded the Nobel Prize in Chemistry, 1909) Ostwald's rule of polymorphism: in general, the least stable polymorph crystallizes first The Ostwald Process, a synthesis method for making nitric acid from ammonia Ostwald ripening, a crystallization effect Ostwald color system Wolfgang Ostwald, chemist and biologist, son of Friedrich Wilhelm Ostwald. He studied colloids Martin Ostwald, a German-American classical scholar Ostwald (crater), a crater on the far side of the moon Ostwald, Bas-Rhin, a commune in the Bas-Rhin département in France See also Oswald (disambiguation) Ozwald Boateng