A4906 Sigma

(+)-Abscisic acid

≥98% (HPLC)

Synonym: (S)-5-(1-Hydroxy-2,6,6-trimethyl-4-oxo-2-cyclohexen-1-yl)-3-methyl-(2Z,4E)-pentadienoic acid, ABA, Dormin



Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Biochem/physiol Actions

Plant hormone and growth regulator that is involved in several physiological mechanisms including seed dormancy, leaf abscission, stomatal movement, and plant stress responses. Through complex interactions with several intracellular signaling systems, it can regulate the expression of hundreds of plant genes.

Other Notes

Natural isomer of the abscission-accelerating plant hormone.


1 mg in glass bottle

250 μg in glass bottle


(+)-Abscisic acid is a plant hormone and growth regulator involved in several physiological mechanisms including seed dormancy, leaf abscission, stomatal movement, and plant stress responses such as drought. Abscisic acid has been used in a study to learn about expression analysis of four peroxiredoxin genes from Tamarix hispida.

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Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis

Certificate of Origin

Frequently Asked Questions

How does the storage temperature relate to shipping conditions?
The storage conditions that a Sigma-Aldrich catalog and label recommend for products are deliberately conservative. For many products, long-term storage at low temperatures will increase the time during which they are expected to remain in specification and therefore are labeled accordingly. Where short-term storage, shipping time frame, or exposure to conditions other than those recommended for long-term storage will not affect product quality, Sigma-Aldrich will ship at ambient temperature. The products sensitive to short-term exposure to conditions other than their recommended long-term storage are shipped on wet or dry ice. Ambient temperature shipping helps to control shipping costs for our customers. At any time, our customers can request wet- or dry-ice shipment, but the special handling is at customer expense if our product history indicates that the product is stable for regular shipment.
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 solvents can be used with Product A4906, (+)-Abscisic acid?
Abscisic acid, Product No. A4906, is soluble in ethanol (10 mg/mL), yielding a clear, colorless solution. For plant cell culture, it can be solubilized in a small amount of 1 N NaOH and diluted with water or medium.
How is Product A4906, (+)-Abscisic acid, prepared?
This product is synthetic. This isomer is isolated from the racemic mixture.
How should Product A4906, (+)-Abscisic acid solutions be stored?
A solution of (+)-Abscisic acid should be stored in single use aliquots at -20°C.
What concentration of Product A4906, (+)-Abscisic acid, is used in plant cell culture?
(+)-Abscisic acid is used at 0.1 to 10 mg/L for plant cell culture.
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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. 
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