1-Hydroxybenzotriazole hydrate

It acts by forming active esters with carboxylic acids, which reduces racemization and enhances reaction efficiency when coupled with agents like DCC or EDC. HOBt hydrate is a white to off-white crystalline solid, water-soluble, and improves yields and purity in peptide and ester synthesis reactions. 1-Hydroxybenzotriazole hydrate (HOBt·xH₂O) is a coupling additive widely used in peptide synthesis and amide bond formation.

CAS No 123333-53-9
Molecular Formula C6H7N3O2
Molecular Weight 153.14 g/mol
Synonyms 1-hydroxybenzotriazole;hydrate