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Sigma-Aldrich

1-Hydroxy-7-azabenzotriazole solution

~0.6 M in DMF, for peptide synthesis

Synonym(s):

3H-[1,2,3]-Triazolo[4,5-b]pyridin-3-ol, HOAt

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About This Item

Empirical Formula (Hill Notation):
C5H4N4O
CAS Number:
39968-33-7
Molecular Weight:
136.11
Beilstein:
1211115
MDL number:
MFCD00210053
UNSPSC Code:
12352005
PubChem Substance ID:
57650093
NACRES:
NA.22
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Product Name

1-Hydroxy-7-azabenzotriazole solution, ~0.6 M in DMF

form

liquid

Quality Level

100

reaction suitability

reaction type: Addition Reactions

concentration

~0.6 M in DMF

impurities

<1.0% water

refractive index

n20/D 1.441

density

0.978 g/mL at 20 °C

application(s)

peptide synthesis

SMILES string

On1nnc2cccnc12

InChI

1S/C5H4N4O/c10-9-5-4(7-8-9)2-1-3-6-5/h1-3,10H

InChI key

FPIRBHDGWMWJEP-UHFFFAOYSA-N

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General description

1-Hydroxy-7-azabenzotriazole solution, also known as 3H-[1,2,3]-triazolo[4,5-b]pyridin-3-ol, is a benzotriazolic additive that is commonly used as a coupling reagent for amino acids and peptides. It is also used to minimize epimerization. [1] [2]

Application

1-Hydroxy-7-azabenzotriazole solution is used as a reagent in the solid-phase synthesis of chiral peptide nucleic acids. [3]

Other Notes

Coupling additive for efficient racemization-free coupling in peptide synthesis;[4][5][6] segment coupling.[7]

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Inhalation - Eye Irrit. 2 - Flam. Liq. 3 - Repr. 1B

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

136.4 °F - closed cup

Flash Point(C)

58 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCN0107
BCCK9699
BCCL1807
BCCJ9637
BCCH0686

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Y. Nishiyama et al.
Tetrahedron Letters, 42, 8789-8789 (2001)
L.A. Carpino et al.
The Journal of Organic Chemistry, 60, 3561-3561 (1995)
Oxyma-B, an excellent racemization suppressor for peptide synthesis
Yahya JE,et al.
Organic & Biomolecular Chemistry, 12, 8379-8385 (2014)
Hsuan-Ni Lin et al.
Journal of orthopaedic research : official publication of the Orthopaedic Research Society, 34(11), 1883-1893 (2016-02-27)
Fracture healing is regulated by a variety of inflammatory mediators and growth factors which act over time to regenerate the injured tissue. This study used a mouse femur fracture model to quantify the temporal expression pattern of lipid mediators, cytokines
Synthesis of chiral peptide nucleic acids using Fmoc chemistry
Yun W and Jie-Cheng X
Tetrahedron, 57, 8107-8113 (2001)
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Questions

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  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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