Chemical additives for dyes; chemical reagents for production of dyes, other than for medical or veterinary purpose; chemicals, namely, phosphor powder; chemical preparations for scientific purposes, other than for medical or veterinary use; cryogenic preparations in solid, liquid or gas state for use in chilling and freezing; biochemical catalysts; radioactive elements for scientific purposes; reagent paper, other than for medical or veterinary purposes; enzyme preparations for industrial pu...