Answer

Other methods to dissolve Kinetin:
 Dissolve in a small volume of dilute HCl (0.1 - 1M), heating slightly until dissolved. Then dilute to required volume with distilled water.
 OR
 Dissolve in a small volume of dilute NaOH (0.5 - 1M). Dilute to required volume with distilled water.
 OR
 Can use a small volume 1M KOH & dilute down to final volume.
 Solutions are best stored in a fridge.