Skip to Content
Merck
All Photos(1)

Documents

711489

Sigma-Aldrich

1-Hydroxybenzotriazole hydrate

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

Synonym(s):

HOBt Hydrate

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

Empirical Formula (Hill Notation):
C6H5N3O · xH2O
CAS Number:
123333-53-9
Molecular Weight:
135.12 (anhydrous basis)
Beilstein:
4515
EC Number:
219-989-7
UNSPSC Code:
12352000
PubChem Substance ID:
329763060
NACRES:
NA.22

Assay

97% dry basis

form

powder

quality

wetted with not less than 20 wt. % water

composition

Water content, ~20%

reaction suitability

reaction type: Addition Reactions

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

Looking for similar products? Visit Product Comparison Guide

General description

1-Hydroxybenzotriazolehydrate (HOBt hydrate) is a hydrated form of HOBt. HOBt is a nucleophilic additive commonly used in synthetic chemistry. It is widely employed as acatalyst or stoichiometric additive to accelerate nucleophilic acyl substitution reactions, specifically amidations. Additionally, it is also used in the synthesis of peptides and nucleotides.

Application

1-Hydroxybenzotriazole hydrate is used as an additive:
  • In the oligonucleotide couplings.
  • In the preparation of poly(ethylene glycol)methyl ether-grafted CTS (mPEG-g-CTS).
1-Hydroxybenzotriazole hydrate can also be used:
  • In the solid phase peptide synthesis on TCNEO(tetracyanoethylene oxide)-modified graphite.

Pictograms

FlameExclamation mark
GHS02,GHS07

Signal Word

Danger

Hazard Statements

H207,H319,H412

Hazard Classifications

Aquatic Chronic 3 - Desen. Expl. 2 - Eye Irrit. 2

Storage Class Code

4.1A - Other explosive hazardous materials

WGK

WGK 1

Flash Point(F)

314.6 °F

Flash Point(C)

157 °C

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Customers Also Viewed

Slide 1 of 1

1 of 1

N,N-Diisopropylethylamine purified by redistillation, 99.5%

Sigma-Aldrich

387649

N,N-Diisopropylethylamine

Tetrahedron Letters, 35, 3315-3315 (1994)
Tetrahedron Letters, 34, 6383-6383 (1993)
Synlett, 733-733 (1993)
T Katoh et al.
International journal of peptide and protein research, 42(3), 264-269 (1993-09-01)
3-Dimethylphosphinothioyl-2(3H)-oxazolone (MPTO) was synthesized, and its ability to effect racemization-free couplings and cyclization of a peptide and its C-terminal epimer was examined. MPTO showed good reactivity in aprotic polar solvents such as N,N-dimethylformamide (DMF) and N-methylpyrrolidone. In reactivity MPTO resembles
Donna Wesolowski et al.
Proceedings of the National Academy of Sciences of the United States of America, 108(40), 16582-16587 (2011-09-29)
Basic peptides covalently linked to nucleic acids, or chemically modified nucleic acids, enable the insertion of such a conjugate into bacteria grown in liquid medium and mammalian cells in tissue culture. A unique peptide, derived from human T cells, has
View All Related Papers

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service