This is a method to prepare DL-isocitric acid from DL isocitric acid-lactone but can also be used to convert DL isocitric acid-lactone to DL isocitric acid in various samples.

To prepare 0.05 M DL isocitric acid: add 435 mg DL isocitric acid-lactone into 10 mL distilled water and pH to 9 using 1 M KOH. Heat in a boiling water bath for 10 min keeping the pH above 7.  Cool and adjust to pH 7.4 with 2 M HCl and dilute to 25 mL.


Product Page (K-ISOC)