Oil Soap Formulation Issues: Rancidity, Salicylic Acid, Hyaluronic Acid, pH, and Odor Masking

Based on the staff's response regarding your proposed oil soap formula:

• Certain oils like Avocado Oil (#91), Cherry Seed Oil (#1249), and Flaxseed Oil (#1319) are prone to developing rancid odors over time.
• For Salicylic Acid, it is recommended to use the liquid, timed-release version (e.g., #1372, #229) to ensure it dissolves properly in the oil base.
• Hyaluronic Acid (#1351, #189) is not expected to provide significant benefits in a wash-off product like soap because it is rinsed off before it can effectively absorb or coat the skin. The staff recommends removing it from the formula.
• To adjust the pH to 5 using Glycolic Acid (#660), a very low concentration is likely needed, estimated around 0.1-0.2%, not 3.5%.
• To mask the rancid smell from the oils, you should use a fragrance (น้ำหอม) or essential oil. Melon Flavor is not suitable as it is a flavor and not strong enough to mask the odor. The staff also suggested trying Citromask (#1501), which helps mask odors and can also help reduce body odor when used in a wash-off product.