Abscisic acid
Plant hormone / From Wikipedia, the free encyclopedia
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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]
Quick Facts Names, Identifiers ...
Names | |
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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[1] | |
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[2][3] | |
Identifiers | |
3D model (JSmol) |
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3DMet | |
Abbreviations | ABA |
2698956 | |
ChEBI | |
ChEMBL | |
ChemSpider |
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ECHA InfoCard | 100.040.275 |
EC Number |
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MeSH | Abscisic+Acid |
PubChem CID |
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RTECS number |
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UNII | |
CompTox Dashboard (EPA) |
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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: | |
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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