【CAS No.】:77-06-5
【CAS】:(1α,2β,4aα,4bβ,10β)-2,4a,7-trihydroxy-1-methyl-8-methylenegibb-3-ene-1,10-dicarboxylic acid 1,4a-lactone
【Molecular Formula】:C19H22O6

【Molecular weight】:346.4g/mol; 
【Physical form】:Crystalline solid. 
【Melting point】:223-225℃( decomp.); 
【pKa】:4.0; 
【Solubility】:In water 5 g/l (room temperature). Soluble in methanol, ethanol, acetone, and aqueous alkalis; slightly soluble in diethyl ether and ethyl acetate. Insoluble in chloroform. Potassium, sodium, and ammonium salts: Readily soluble in water (potassium salt 50; 
【Stability】:Dry gibberellic acid is stable at room temperature, but slowly undergoes hydrolysis in aqueous or aqueous-alcoholic solutions, DT50 (20℃) c. 14 d ( pH 3-4), 14 d ( pH 7)