1-Hydroxybenzotriazole Hydrate CAS 123333-53-9

CAS Number: 123333-53-9
Name: 1-Hydroxybenzotriazole Hydrate
Molecular Formula: C6H7N3O2
Molecular Weight: 153.14
EINECS: 602-929-2

*For Research or Industrial Use Only, Not for Diagnostic or Therapeutic Use.


Identified by the CAS number 123333-53-9, 1-Hydroxybenzotriazole Hydrate, abbreviated as HOBt hydrate, is a kind of HOBt reagent. Characterized by the molecular formula C6H5N3O2·H2O and a molecular weight of 155.14 g/mol, this compound exhibits solubility in common organic solvents while displaying limited solubility in water.

1-Hydroxybenzotriazole Hydrate CAS 123333-53-9 Product Information:

Product Name:

1-Hydroxybenzotriazole hydrate


HOBTM;HOBT HYDRATE;HOBT H2O;1H-1,2,3-benzotriazol-1-ol hydrate solution;1-HYDROXYBENZOTRIAZOLE 15 WT. % SOLUTI&;1H-Benzo[d][1,2,3]triazol-1-ol xhydrate;1H-benzo[d][1,2,3]triazol-1-ol hydrate;HOBT.H2O1-Hydroxybenzotriazole hydrate









Melting point


Boiling point

248.8℃ (rough estimate)


1.065 g/cm

storage temp.

Keep in dark place,Inert atmosphere,Room temperature


DMF: 100 mg/mL, clear




White to Off-White

Water Solubility

slightly soluble

1-Hydroxybenzotriazole Hydrate CAS 123333-53-9 Use:

Chemical Synthesis: Integral in synthesizing various compounds crucial for diverse industrial processes.

Peptide Chemistry: Used in peptide synthesis as a coupling reagent, enhancing the efficiency of peptide bond formation.

Polymer Industry: Influential in polymerization processes, shaping the characteristics of resulting polymers for diverse applications.

Specialty Chemicals: Crucial in the production of specialty chemicals, enabling the creation of materials with unique properties tailored to specific industrial needs.

Dye and Pigment Manufacturing: Utilized in the production of dyes and pigments, actively contributing to the coloration of various materials.


In summary, CAS 123333-53-9 1-Hydroxybenzotriazole Hydrate (HOBt Chemical) stands as a meticulously formulated fine chemical raw material. Its significance spans chemical synthesis, peptide chemistry, polymerization, specialty chemicals, and dye and pigment manufacturing across diverse industrial sectors.


Oceania 2 in Australia
Europe 1 in German 1 in Netherland
Russia 1 in Mosco

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