Abstract: Composition of matter and process effecting a nitrogen-containing material that flows freely and resists caking even on prolonged storage. It can be manufactured to yield a desired percent nitrogen upon analysis characterized by the nitrogen-containing material in its normal manufactured form having on the external surface thereof an amount that is sufficient to reduce its normal caking tendencies an alkene sulfonate containing from 6 to 26 carbon atoms, inclusive. Further reduced caking tendency is effected by including on the surface of the nitrogen-containing material an inert material, such as clay. Also disclosed are the effective and optimum amounts of the respective materials that are added, the amounts being given as an average percent by weight basis.