A1287 Sigma-Aldrich


Hybri-Max, γ-irradiated, lyophilized powder, BioXtra, suitable for hybridoma

Synonym: 4-Amino-1-(β-D-ribofuranosyl)-1,3,5-triazin-2(1H)-one, Ladakamycin

  • CAS Number 320-67-2

  • Empirical Formula (Hill Notation) C8H12N4O5

  • Molecular Weight 244.20

  •  Beilstein Registry Number 620461

  •  EC Number 206-280-2

  •  MDL number MFCD00006539

  •  PubChem Substance ID 24890525



Related Categories A - K, Antibacterial, Antibiotics, Antibiotics A to Z, Antibiotics by Application,
grade   Hybri-Max
sterility   γ-irradiated
product line   BioXtra
form   lyophilized powder
impurities   endotoxin, tested
mp   226-232 °C (dec.) (lit.)
suitability   suitable for hybridoma
Mode of action   DNA synthesis | interferes
antibiotic activity spectrum   viruses
storage temp.   −20°C



Used to study the effects of the DNA incorporated molecule on DNA methylation processes.


Reconstitute contents of vial with 10 mL sterile cell culture medium. Stock solution is sufficient to prepare 500ml medium. Final working concentration: 10 μM 5-azacytidine.

Biochem/physiol Actions

A potent growth inhibitor and cytotoxic agent; inhibits DNA methyltransferase, an important regulatory mechanism of gene expression, gene activation and silencing.

General description

Chemical structure: nucleoside

Legal Information

Hybri-Max is a trademark of Sigma-Aldrich Co. LLC

Safety & Documentation

Safety Information

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


Certificate of Analysis

Certificate of Origin

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
How do I get lot-specific information or a Certificate of Analysis?
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
What is the concentration of Product A1287, 5-Azacytidine - Hybri-Max?
The working concentration is 10 μM, so the 50X stock is 500 μM.
How much is contained in the 1 vial of Product A1287, 5-Azacytidine - Hybri-Max?
1 vial contains 1.2 mg.
How is Product A1287, 5-Azacytidine - Hybri-Max, to be dissolved? And once dissolved, is the solution stable?
Dissolve each 1.2 mg vial in 10 mL of culture medium. This compound is very unstable in aqueous solutions; we have found a 10% loss after just 2-3 hours at room temperature in phosphate buffer pH 7.4, even faster loss at 50°C. We generally recommend keeping solutions on ice during the course of a day. If stock solution must be kept, store them in the freezer at -20°C in single use aliquots.
How do I find price and availability?
There are several ways to find pricing and availability for our products.Once you log onto our website, you will find the price and availability displayed on the product detail page.You can contact any of our Customer Sales and Service offices to receive a quote. USA customers: 1-800-325-3010 orview local office numbers.
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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