Stable S-(+)-Abscisic Acid Nonaqueous Liquid Solutions
Stable S-(+)-abscisic acid (S-ABA) non-aqueous liquid solutions are generally achieved without the use of an effective amount of an antioxidant and/or an ultraviolet absorber to S-(+)-abscisic acid. In a preferred embodiment, the stable S-(+)-abscisic acid (S-ABA) nonaqueous liquid solutions includes at least one organic solvent, such as at least one polyethylene glycol, at least one glycol, and/or at least one lactamide and/or at least one pentanoate.
1 . A nonaqueous liquid solution comprising:
a) about 0.001 to about 25 wt. % of least one form of S-(+) abscisic acid (S-ABA);
b) about 40 to 99.9 wt. % of at least one organic solvent selected from the group consisting of at least one form of polyethylene glycol;
c) optionally, 0 to about 50 wt. % of at least one non-aqueous co-solvent;
d) optionally, 0 to about 20 wt. % at least one surfactant;
e) optionally, additional plant growth regulator(s);
f) optionally, additional plant nutrients;
g) less than 0.1 wt. % antioxidant;
h) less than 0.1 wt. % UV absorber; and
i) ≤10 wt. % water.
2 . The solution of claim 1 , comprising about 75-99.9 wt. % polyethylene glycol with a molecular weight from about 190-410 as said at least one organic solvent.
3 . The solution of claim 1 , comprising about 79.5-90 wt. % polyethylene glycol with a molecular weight from about 190-210 as said at least one organic solvent.
4 . The solution of claim 1 , comprising about 10-20.5 wt. % of one form of S-(+) abscisic acid.
5 . The solution of claim 1 , wherein the at least one form of S-(+) abscisic acid is 2-cis, 4-trans-(S)-abscisic acid.
6 . The solution of claim 1 , comprising <5 wt. % water.
7 - 21 . (canceled)
22 . The solution of claim 1 , wherein said UV absorber is selected from the group consisting of benzophone-3, ethylhexyl methoxycinnamate, and mixtures thereof.
23 . The solution of claim 22 , wherein said UV absorber is benzophone-3.
24 . The solution of claim 22 , wherein said UV absorber is ethylhexyl methoxycinnamate.
25 . The solution of claim 1 , wherein said antioxidant is selected from the group consisting of t-butylhydroquinone (TBHQ), propyl gallate, clove oil, ethoxyquin, and mixtures thereof.
26 . The solution of claim 25 , wherein said antioxidant is t-butylhydroquinone (TBHQ).
27 . The solution of claim 3 , comprising about 10-20.5 wt. % of one form of S-(+) abscisic acid.
28 . The solution of claim 27 , comprising <1 wt. % water.
29 . The solution of claim 1 , comprising ≤1 wt. % water.
30 . The solution of claim 1 , comprising 8-30 wt. % of at least one non-aqueous co-solvent.
31 . The solution of claim 1 , comprising ≤25 wt. % plant growth regulator(s).
32 . The solution of claim 1 , comprising ≤25 wt. % additional plant nutrients.
33 . The solution of claim 1 comprising
a) 10-20.5 wt. % of one form of S-(+) abscisic acid.
b) 79.5-90 wt. % polyethylene glycol with a molecular weight from about 190-210 as said at least one organic solvent
c) 8-30 wt. % of at least one non-aqueous co-solvent
d) optionally, 0 to about 20 wt. % at least one surfactant;
e) optionally, additional plant growth regulator(s);
f) optionally, additional plant nutrients;
g) less than 0.1 wt. % antioxidant;
h) less than 0.1 wt. % UV absorber; and
i) ≤1 wt. % water.
34 . The solution of claim 33 wherein the at least one form of S-(+) abscisic acid is 2-cis, 4-trans-(S)-abscisic acid.