Chemical, biochemical and biotechnological products for scientific and laboratory research purposes, namely, nucleic acids, enzymes and polymererases for laboratory and research use, [ diagnostic reagents and chemical buffers used for the isolation, purification or separation of nucleic acids, oligonucleotides or proteins, and protein arrays none of the foregoing for medical or veterinary purposes; ] chemical reagents [ and aromatic solvents ] for [ sample preparation, modification and manipu...