Investigation was made of oxygen production by means of chemical absorbents which remove oxygen from the air. The particular problem considered is that of obtaining sufficient basic data on the behavior of the absorbent to enable preliminary design of oxygen producing units. Two compounds are discussed ethomine and fluomine. Both compounds are derivatives of the organic chelate salcomine, cobalt salicylaldehyde ethylenediamine. Experimental work on fluomine showed it to have the same general properties as ethomine. The optimum absorption temperature and the equilibrium desorption temperature were approximately the same as those of ethomine, but fluomine had a higher rate of reaction and a higher oxygen capacity. Fluomine showed a life considerably better than either salcomine or ethomine on the basis of oxygen produced. Its rate of deterioration was less than half that of ethomine, and at 50 deterioration, it had produced 70 times its weight of oxygen.