All Photos(1)



(+)-Abscisic acid

≥98% (HPLC)

Dormin, (S)-5-(1-Hydroxy-2,6,6-trimethyl-4-oxo-2-cyclohexen-1-yl)-3-methyl-(2Z,4E)-pentadienoic acid, ABA
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level


≥98% (HPLC)

Featured Industry


storage temp.


SMILES string




InChI key


Looking for similar products? Visit Product Comparison Guide


(+)-Abscisic acid has been used:
  • as a supplement for the germination of Arabidopsis thaliana seeds
  • as a component of buffered nodulation medium to check its effects on lateral root density (LRD) in leguminous and non-leguminous plants
  • as a standard to study its effects on root meristem defects in Medicago truncatula latd mutant


1 mg in glass bottle
250 μg in glass bottle

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.

Storage Class Code

13 - Non Combustible Solids

WGK Germany


Flash Point F

Not applicable

Flash Point C

Not applicable

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

  1. 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. See Shipping and Storage for more information.

  2. 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.

  3. 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.

  4. 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.

  5. How is Product A4906, (+)-Abscisic acid, prepared?

    This product is synthetic. This isomer is isolated from the racemic mixture.

  6. How should Product A4906, (+)-Abscisic acid solutions be stored?

    A solution of (+)-Abscisic acid should be stored in single use aliquots at -20°C.

  7. 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.

  8. 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.

  9. 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.

  10. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

Yan Liang et al.
Developmental biology, 304(1), 297-307 (2007-01-24)
The LATD gene of the model legume, Medicago truncatula, is required for the normal function of three meristems, i.e. the primary root, lateral roots and nitrogen-fixing nodules. In latd mutants, primary root growth eventually arrests, resulting in a disorganized root...
Takuya Miyakawa et al.
Trends in plant science, 18(5), 259-266 (2012-12-26)
The phytohormone abscisic acid (ABA) plays a crucial role in adaptive responses to environmental stresses, such as drought and high salinity, as well as in plant development, such as seed maturation and dormancy. PYR/PYL/RCAR has been identified as a bona...
Response of root branching to abscisic acid is correlated with nodule formation both in legumes and nonlegumes
Liang Y and Harris J M
American Journal of Botany, 92(10), 1675-1683 (2005)
Yan Liang et al.
American journal of botany, 92(10), 1675-1683 (2005-10-01)
Legumes are unique among higher plants in forming a symbiosis with Rhizobium. Phylogenetic studies indicate this symbiosis may have evolved as many as three times within the Fabaceae; alternatively, a predisposition for nodulation evolved early in the history of the...
Regulated expression of Arabidopsis Shaker K+ channel genes involved in K+ uptake and distribution in the plant
Pilot G, et al.
Plant Molecular Biology, 51(5), 773-787 (2003)

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service