Ostwald

Ostwald may refer to:


 * Friedrich Wilhelm Ostwald, the physico-chemist (awarded the Nobel Prize in Chemistry, 1909)
 * 1) Ostwald's rule of polymorphism: in general, the least stable polymorph crystallizes first
 * 2) The Ostwald Process, a synthesis method for making nitric acid from ammonia
 * 3) Ostwald ripening, a crystallization effect
 * 4) 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