Teroxirone

Water < 1 (mg/mL)

O.1 N HCl < 1 (mg/mL)

pH 4 buffer 2.5 - 5 (mg/mL)

pH 9 buffer < 1 (mg/mL)

0.1 N NaOH 1 - 2.5 (mg/mL)

10% EtOH < 1 (mg/mL)

Bulk: After heating at 60 °C for 30 days in the dark, the sample purity dropped from > 99% to 93 ± 1 %. (HPLC) Solution: A solution in water decomposed 29% in 72 hours. Aqueous solutions are most stable at pH 6. When acetonitrile was substituted for water as the storage solvent, < 1% decomposition was observed through 72 hours (HPLC).