What is Sodium octanoate ? In the pharmaceutical industry, biological agents (human albumin) contain sodium caprylate as an inactive ingredient. In biological aspects, higher acid salts are generally used for special breeding of bacterial species. The reason why salts are used is that salts have greater solubility than higher acids themselves. And the PH value is better adjusted. For example, when breeding bacteria that can degrade caprylic acid, sodium caprylate needs to be added to the culture medium. Application of Sodium octanoate Sodium caprylate is used as a protein stabilizer in biological preparations.