Stable S-(+)-Abscisic Acid Nonaqueous Liquid Solutions

Abstract

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.