Azidobutyric acid NHS ester - ≥95% , CAS No.943858-70-6

CAS: 943858-70-6 Cat. No.: A276210 Molecular Weight: 226.19 EC Number: 815-672-8
AVAILABLE TO ORDER
GRADE & PURITY ≥95%
Synonyms
HY-126521 | F80654 | Butanoic acid, 4-aazido-a? 2,a?-adioxo-a?-apyrrolidinyl ester | LCZC461 | (2,5-dioxopyrrolidin-1-yl) 4-azidobutanoate | MFCD22573606 | EN300-265680 | BP-22526 | GS-6342 | 4-Azidobutyric acid N-hydroxysuccinimide ester | SCHEMBL1343354
Storage
Protected from light,Store at -20°C,Desiccated
Shipped In
Ice chest + Ice pads
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
10mg
A276210-10mg
5
$39.90
25mg
A276210-25mg
2
$69.90
50mg
A276210-50mg
3
$96.90
250mg
A276210-250mg
2
$339.90
500mg
A276210-500mg
2
$499.90
Enter a quantity for the sizes you want to add.
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Why this grade

≥95% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Protected from light,Store at -20°C,Desiccated Ships Ice chest + Ice pads Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

N3-C3-NHS ester is a noncleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs). N3-C3-NHS ester is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.

Specifications

Synonyms
HY-126521 | F80654 | Butanoic acid, 4-aazido-a? 2, a?-adioxo-a?-apyrrolidinyl ester | LCZC461 | (2, 5-dioxopyrrolidin-1-yl) 4-azidobutanoate | MFCD22573606 | EN300-265680 | BP-22526 | GS-6342 | 4-Azidobutyric acid N-hydroxysuccinimide ester | SCHEMBL1343354
Specifications & Purity
≥95%
Biochemical and Physiological Mechanisms
Azido-NHS ester for the conversion of proteins, peptides, amino-DNA, and other amines into Click Chemistry reactive azides.
Storage
Protected from light, Store at -20°C, Desiccated
Shipped In
Ice chest + Ice pads
This product requires cold chain shipping. Ground and other economy services are not available.
Note
Need more advice on solubility, usage and handling? Please visit our frequently asked questions (FAQ) page for more details.
Purity
≥95%
Names and Identifiers
Pubchem Sid488201974
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488201974
Canonical SmilesC1CC(=O)N(C1=O)OC(=O)CCCN=[N+]=[N-]
IUPAC Name(2,5-dioxopyrrolidin-1-yl) 4-azidobutanoate
InChIKeyYYULROINNKAMIB-UHFFFAOYSA-N
INCHI1S/C8H10N4O4/c9-11-10-5-1-2-8(15)16-12-6(13)3-4-7(12)14/h1-5H2
Isomeric SMILES C1CC(=O)N(C1=O)OC(=O)CCCN=[N+]=[N-]
Molecular Weight 226.19
Reaxy-Rn 11080188
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=11080188&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganoheterocyclic compounds
ClassPyrrolidines
SubclassPyrrolidones
Intermediate Tree Nodes Not available
Direct ParentPyrrolidine-2-ones
Alternative Parents Dicarboximides  Lactams  Azo imides  Azo compounds  Monocarboxylic acids and derivatives  Azacyclic compounds  Organic zwitterions  Organic salts  Organic oxides  Hydrocarbon derivatives  Carbonyl compounds  
Molecular FrameworkAliphatic heteromonocyclic compounds
Substituents 2-pyrrolidone - Dicarboximide - Azo compound - Azo imide - Lactam - Carboxylic acid derivative - Monocarboxylic acid or derivatives - Azacycle - Organooxygen compound - Organonitrogen compound - Organic nitrogen compound - Hydrocarbon derivative - Organic oxide - Carbonyl group - Organic oxygen compound - Organic zwitterion - Organic salt - Aliphatic heteromonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as pyrrolidine-2-ones. These are pyrrolidines which bear a C=O group at position 2 of the pyrrolidine ring.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

17 results found

Lot NumberCertificate TypeDateItem
H2515042Certificate of AnalysisMay 20, 2026 A276210
C23151152Certificate of AnalysisApr 03, 2026 A276210
C23151179Certificate of AnalysisApr 03, 2026 A276210
C23151181Certificate of AnalysisApr 03, 2026 A276210
C23151183Certificate of AnalysisApr 03, 2026 A276210
C23151185Certificate of AnalysisApr 03, 2026 A276210
D2623078Certificate of AnalysisFeb 26, 2026 A276210
D2623077Certificate of AnalysisFeb 26, 2026 A276210
D2623076Certificate of AnalysisFeb 26, 2026 A276210
D2623074Certificate of AnalysisFeb 26, 2026 A276210
D2623075Certificate of AnalysisFeb 26, 2026 A276210
L2418088Certificate of AnalysisOct 11, 2025 A276210
C23151186Certificate of AnalysisDec 21, 2023 A276210
C23151184Certificate of AnalysisDec 21, 2023 A276210
C23151182Certificate of AnalysisDec 21, 2023 A276210
C23151180Certificate of AnalysisDec 21, 2023 A276210
C23151156Certificate of AnalysisDec 21, 2023 A276210

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Chemical and Physical Properties
SolubilityDMSO DMF
SensitivityLight Sensitive,Moisture Sensitive,Heat Sensitive
Molecular Weight226.190 g/mol
XLogP30.400
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count6
Rotatable Bond Count6
Exact Mass226.07 Da
Monoisotopic Mass226.07 Da
Topological Polar Surface Area78.000 Ų
Heavy Atom Count16
Formal Charge0
Complexity345.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Solution Calculators
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