Abscisic acid

Abscisic acid
Stereo, skeletal formula of abscisic acid
Names
Preferred IUPAC name
(2Z,4E)-5-[(1S)-1-Hydroxy-2,6,6-trimethyl-4-oxocyclohex-2-en-1-yl]-3-methylpenta-2,4-dienoic acid[3]
Other names
(2Z,4E)-(S)-5-(1-Hydroxy-2,6,6-trimethyl-4-oxo-2-cyclohexen-1-yl)-3-methyl-2,4-pentanedienoic acid; Dormic acid;[citation needed] Dormin[1][2]
Identifiers
3D model (JSmol)
3DMet
Abbreviations ABA
2698956
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.040.275 Edit this at Wikidata
EC Number
  • 244-319-5
MeSH Abscisic+Acid
RTECS number
  • RZ2475100
UNII
  • InChI=1S/C15H20O4/c1-10(7-13(17)18)5-6-15(19)11(2)8-12(16)9-14(15,3)4/h5-8,19H,9H2,1-4H3,(H,17,18)/b6-5+,10-7-/t15-/m1/s1 checkY
    Key: JLIDBLDQVAYHNE-YKALOCIXSA-N checkY
  • OC(=O)\C=C(\C)/C=C/[C@@]1(O)C(C)=CC(=O)CC1(C)C
Properties
C15H20O4
Molar mass 264.321 g·mol−1
Appearance Colorless crystals
Density 1.193 g/mL
Melting point 163 °C (325 °F; 436 K)[4]
log P 1.896
Acidity (pKa) 4.868
Basicity (pKb) 9.129
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H315, H319, H335
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Abscisic acid (ABA or abscisin II[5]) is a plant hormone. ABA functions in many plant developmental processes, including seed and bud dormancy, the control of organ size and stomatal closure. It is especially important for plants in the response to environmental stresses, including drought, soil salinity, cold tolerance, freezing tolerance, heat stress and heavy metal ion tolerance.[6]

  1. ^ O'Neil, Maryadele J; Heckelman, PE; Koch, CB; Roman, KJ (2006). The Merck Index, 14th.
  2. ^ 21293-29-8
  3. ^ "Abscisic Acid - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 16 September 2004. Identification and Related Records. Retrieved 22 October 2011.
  4. ^ "ChemSpider database - Abscisic acid - Properties". Retrieved 27 December 2012. The melting point is decided by experimental data by Tokyo Chemical Industry Ltd.
  5. ^ Cite error: The named reference Davis-1972 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Finkelstein-2013 was invoked but never defined (see the help page).