Such as sodium thiosulfate, which functions to be a sulfur donor to the endogenous rhodanese enzyme that detoxifies cyanide by converting it to thiocyanate Hydrolysis (the interaction with water) causes the moist solid to release trace portions of hydrogen cyanide. A typical description with the odor of hydrogen cyanide is https://potassiumcyanidemsds66307.atualblog.com/35709621/getting-my-is-potassium-cyanide-a-conjugate-base-to-work