CAS Registry Number

CAS 2592-95-2 — HOBT anhydrous (1-Hydroxybenzotriazole anhydrous)

HOBT anhydrous (1-Hydroxybenzotriazole anhydrous) is a widely used coupling reagent in peptide synthesis, facilitating amide bond formation with high efficiency and minimal racemization. It is also employed in organic synthesis to activate carboxylic acids for ester and amide formation. HOBT anhydrous has a CAS number of 2592-95-2, a molecular formula of C6H5N3O, and a molecular weight of 135.1234 g/mol. It requires storage at +4°C or below and carries no signal word for hazard classification. Molekula supplies HOBT anhydrous from research to bulk quantities with full documentation and ISO 9001:2015 traceability.