Long-chain synthetic acids are chemical compounds with long, linear carbon backbones and a carboxylic acid group at the end, typically ranging from 10 to 50 or more carbons. They are utilized as intermediates in the production of various plastics like polyamides and polyesters, hot-melt adhesives, and lubricants due to the superior properties imparted by their long chains. Production methods include chemical synthesis and biotechnology, with advances in systems metabolic engineering enabling sustainable production from renewable resources like plant oils