What does mold smell like?

Musty, perfumy, dirty, Old Basement, Farm, rancid, rotten. The list goes on and on depending on the persons sense of smell that’s describing the odor. More accurately, your smelling M.V.O.C’s. Micro volatile organic compounds. Because mold is organic, it uses oxygen and re-produces. During the reproduction cycle, mold emits gasses. There are over 200 types of MVOC’s. Mold’s smell is directly linked to the MVOC’s they give off.