Used primarily as an intermediate in the synthesis of biotin (vitamin B7), 9-amino-9-oxononanoic acid plays a key role in pharmaceutical and fine chemical manufacturing. It serves as a building block for preparing biotin analogs and derivatives used in nutritional supplements, cosmetics, and medical research. Due to its amino and carboxylic functional groups, it is also employed in the development of peptides and specialty polymers. Its structure allows for easy modification, making it valuable in creating bioactive molecules and enzyme inhibitors.