| 摘要 |
A long-term storage stable tretinoin and 4-hydroxyanisole composition contains low molecular weight polyethylene glycol, antioxidant, a chelating agent, lower alkanol and water. The chelating agent provides at least two of the functions of oxygen scavaging, free radical chain terminating and reducing. The composition has a pH of 2.5 to 5 and a water content of at least 12%. |
