A1287 Sigma


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



Related Categories A - K, Antibacterial, Antibiotics, Antibiotics A to Z, Antibiotics A-F,
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


Frequently Asked Questions

Frequently Asked Questions are available for this Product.


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.

Legal Information

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

Price and Availability

All labs need water
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. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option:
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 or view 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, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
  What kind of solution is the A5955 - Antibiotic Antimycotic Solution (100×), Stabilized product suspended in?
A5955 - Antibiotic Antimycotic Solution (100×), Stabilized is supsended in a sodium citrate buffer solution. Source: Israel production group
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Protocols & Articles
Peer-Reviewed Papers


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