Starch succinic half-ester

The benzotriazolide of the succinic half-ester of starch was prepared by reaction with 1-H-benzotriazole in the presence of ci-cyclohexylcarbodiimide. The reaction yield was about 66%, i.e., only about two out of three carboxyl groups were transformed into benzotriazolide groups ... 

Starch succinates [39316-70-6] are also used as thickening agents in foods. The 1-octenylsuccinate half-ester [52906-93-17, sold as its sodium salt [66829-29-6], has surface active (emulsifying) properties. 

Succinic anhydride reacts directly with starch to form a half-ester called starch succinate. Starch can also react with alkyl or alkenyl derivatives of succinic anhydride to form the corresponding succinates, among which one of the most used is starch sodium octenylsuccinate. Due to the presence of hydrophobic and hydrophilic groups, this product has interfacial activity and emulsif5ung properties. Alkenylsuccinates are used in food, pharmaceutical and industrial applications [39]. 

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