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 non-aqueous liquid solution comprising:
a) about 10 to about 40 wt.% of at least one form of S-(+) abscisic acid (S-ABA);
b) about 20 to 90 wt.% of an organic solvent, which is N,N-dimethyl lactamide;
c) optionally, 0 to about 50 wt.% of at least one non-aqueous co-solvent;
d) optionally, 0 to about 20 wt.% of 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) 5 wt.% water;
wherein the average amount of S-ABA does not decline to less than 95% of the average content measured prior to storage stability performed at 54±2° C. for 14 days.
2. The solution of claim 1 , comprising 60-90 wt.% N,N-dimethyl lactamide as the organic solvent.
3. The solution of claim 2 , wherein the at least one form of S-(+) abscisic acid is 2-cis,4-trans-(S)-abscisic acid.
4. The solution of claim 3 , comprising ≤2 wt.% water.
5. The solution of claim 1 , wherein said UV absorber is selected from the group consisting of benzophone-3, ethylhexyl methoxycinnamate, and mixtures thereof.
6. The solution of claim 5 , wherein said UV absorber is benzophone-3.
7. The solution of claim 5 , wherein said UV absorber is ethylhexyl methoxycinnamate.
8. 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.
9. The solution of claim 8 , wherein said antioxidant is t-butylhydroquinone (TBHQ).
10. The solution of claim 1 , comprising ≤1 wt.% water.
11. The solution of claim 1 , comprising 8-30 wt.% of at least one non-aqueous co-solvent.
12. The solution of claim 1 , comprising ≤25 wt.% plant growth regulator(s).
13. The solution of claim 1 , comprising ≤25 wt.% additional plant nutrients.
14. A non-aqueous liquid solution comprising:
a) about 10 to about 40 wt.% of at least one form of S-(+) abscisic acid (S-ABA);
b) about 60 to 90 wt.% of an organic solvent, which is N,N-dimethyl lactamide;
c) 8-30 wt.% of at least one non-aqueous co-solvent;
d) optionally, 0 to about 20 wt.% of at least one surfactant;
e) 25 wt.% plant growth regulator(s);
f) 25 wt.% additional plant nutrients;
g) less than 0.1 wt.% antioxidant;
h) less than 0.1 wt.% UV absorber; and
i) 2 wt.% water;
wherein said non-aqueous liquid solution has a stability performance of ±5% for S-ABA in said non-aqueous liquid solution when subjected to an elevated temperature of 54° C. for 14 days.
15. The solution of claim 14 , wherein said UV absorber is selected from the group consisting of benzophone-3, ethylhexyl methoxycinnamate, and mixtures thereof.
16. The solution of claim 14 , wherein said antioxidant is selected from the group consisting of t-butylhydroquinone (TBHQ), propyl gallate, clove oil, ethoxyquin, and mixtures thereof.
17. The solution of claim 14 , wherein the at least one form of S-(+) abscisic acid is 2-cis, 4-trans-(S)-abscisic acid.
18. The solution of claim 16 , comprising about 16 to about 40 wt. % of at least one form of S-(+) abscisic acid (S-ABA).