Used as an activator reagent in automated DNA and RNA oligonucleotide synthesis. Facilitates phosphoramidite coupling reactions during nucleic acid assembly. Employed in biotechnology pharmaceutical and molecular biology research laboratories. Utilized in the synthesis of modified nucleic acids and gene-related research materials.

Its primary purpose is to enhance the efficiency and rate of phosphoramidite coupling reactions during oligonucleotide synthesis enabling the production of high-purity DNA and RNA sequences for research and therapeutic applications.

0.5 M 5-Ethylthiotetrazole (ETT) solution is a moisture-sensitive reagent prepared by dissolving 5-ethylthiotetrazole in anhydrous acetonitrile. It is commonly used as an activator in phosphoramidite-based synthesis reactions particularly in the production of synthetic oligonucleotides.