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  • A2169 - 3′-Azido-3′-deoxythymidine

A2169 Sigma-Aldrich


≥98% (HPLC)

Synonym: AZT, Azidothymidine, ZDV, Zidovudine

  • CAS Number 30516-87-1

  • Empirical Formula (Hill Notation) C10H13N5O4

  • Molecular Weight 267.24

  •  Beilstein Registry Number 3595791

  •  MDL number MFCD00006536

  •  PubChem Substance ID 24278143



Biochem/physiol Actions

Reverse transcriptase inhibitor active against HIV-1 virus.

Azidothymidine (AZT), a thymidine analogue, is a reverse transcriptase inhibitor against the HIV-1 virus. Azidothymidine has been shown to decrease CRISPR-mediated homology-directed repair (HDR) efficiency.


1 g in glass bottle

100, 250 mg in glass bottle

25 mg in glass insert

Features and Benefits

This compound is a featured product for ADME Tox research. Click here to discover more featured ADME Tox products. Learn more about bioactive small molecules for other areas of research at sigma.com/discover-bsm.

This compound is also offered as part of Sigma′s Library of Pharmacologically Active Compounds (LOPAC®1280), a biologically annotated collection of high-quality, ready-to-screen compounds. Click here to learn more.

Legal Information

LOPAC is a registered trademark of Sigma-Aldrich Co. LLC

Safety & Documentation

Safety Information

GHS08  GHS08
Signal word 
Hazard statements 
Precautionary statements 
NONH for all modes of transport
WGK Germany 


Certificate of Analysis

Certificate of Origin

Milli-Q® Water Purification Solutions
Protocols & Articles


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Small Molecule CRISPR Enhancers

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Keywords: Bioactive small molecules, Chemical biology, Cyclizations, Genetic, Recombination, Transcription

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Peer-Reviewed Papers


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