Radioactive elements for scientific purposes; chemical agents for use in the manufacture of dyestuffs; cryogenic preparations in solid, liquid, or gas state for use in chilling and freezing; electrophoresis gels; Cultures of microorganisms, other than for medical and veterinary use; test paper, chemical; chemical preparations for scientific purposes, other than for medical or veterinary use; biochemical catalysts; chemical substances for analyses in laboratories, other than for medical or vet...