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711489 Sigma-Aldrich

1-Hydroxybenzotriazole hydrate

wetted with not less than 20 wt. % water, 97%

Synonym: HOBt Hydrate

  • CAS Number 123333-53-9

  • Empirical Formula (Hill Notation) C6H5N3O · xH2O

  • Molecular Weight 135.12 (anhydrous basis)

  •  Beilstein/REAXYS Number 4515

  •  EC Number 219-989-7

  •  PubChem Substance ID 329763060

  •  NACRES NA.22

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Properties

Related Categories Active Esters/Additives, Chemical Synthesis, Coupling, Synthetic Reagents
Quality Level   200
assay   97%
  97.0-103.0% (T)
quality   wetted with not less than 20 wt. % water
impurities   ≥20% water
mp   155-158 °C (lit.)
solubility   DMF: 0.1 g/mL, clear
SMILES string   [H]O[H].On1nnc2ccccc12
InChI   1S/C6H5N3O.H2O/c10-9-6-4-2-1-3-5(6)7-8-9;/h1-4,10H;1H2
InChI key   PJUPKRYGDFTMTM-UHFFFAOYSA-N

Description

Packaging

50, 250 g in poly bottle

Application

Additive used in oligonucleotide couplings and in racemization-free peptide couplings.

Safety & Documentation

Safety Information

Symbol 
Signal word 
Warning-Warning
Hazard statements 
Supplemental Hazard Statements 
EUH001 - EUH044EUH001 - EUH044
RIDADR 
UN3474 - class 4.1 - PG 1 - 1-Hydroxybenzotriazole, monohydrate
WGK Germany 
nwg
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Protocols & Articles

Articles

COMU—Safer and More Efficient Peptide Coupling Reagent

Proteins and peptides are ubiquitous in all living systems. The chemical synthesis of peptidic structures for scientific research or drug discovery relies heavily on efficient coupling reagents. This...
Dr. Matthias Junkers
Aldrich Chemfiles, 2010 Volume 10 Article 1
Keywords: Calorimetry, Coupling reactions, Drug discovery, Epimerizations, Microwave synthesis, Peptide synthesis, Racemizations, Reductions, Solid phase peptide synthesis, Solvents

Related Content

Indoles, Purines, and Their Isosteres

Substituted indoles and purines have frequently been referred to as “privileged structures” since they are capable of binding to multiple receptors with high affinity, and thus have applications acro...
Keywords: Building blocks, Medicinal chemistry

Peer-Reviewed Papers
15

References

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