7 

 According to Abbott Laboratories (1962), gibberellic acid solubility 

 in various solvents is as follows: 



Solvent Mg/ml Solvent 



Dimethyl Formamide 450 



Ethyl Alcohol 200 



Methyl Acetone 180 



Di acetone Alcohol 120 



Isopropyl Alcohol 80 



Acetone 40 



Tap Water 5 



Since gibberellic acid is readily soluble in numerous compounds 

 including water, it is readily formulated for various commercial applica- 

 tions (Abbott Laboratories, 1962). The potassium, sodium, and ammonium 

 salts of the acid are more soluble than the acid alone due to the buf- 

 fering of the aqueous solutions (Abbott Laboratories, 1962). Stuart and 

 Cathey (1961) indicated that these salts of gibberellic acid were equally 

 as active on the growth of pea and cucumber seedlings as the acid. 



Abbott Laboratories (1962) indicated that dried gibberellic acid 

 powder is stable indefinitely; however, its aqueous solution is rela- 

 tively unstable at room temperatures with a half-life of one month. 

 Stability can be increased by storing the solution at low temperatures 

 or by utilizing sterile water. Gibberellic acid solutions prepared with 

 anhydrous solvents are extremely stable; therefore, commercial con- 

 centrates usually utilize non-phytotoxic organic solvents. 



Commercially, gibberellic acid is produced by culturing 

 Gibberella fungus in a liquid culture medium from which the acid is 



