Salicylic Acid in Bar Soap: Product and Usage
Question
Seeking recommendations for a liquid Salicylic Acid product suitable for bar soap formulation, including the recommended usage percentage and calculation for 80g soap bars and 1kg soap base.
Answer
Salicylic Acid for Bar Soap
For adding Salicylic Acid in liquid form to bar soap, the recommended product is Liquid Salicylic Acid (40% Active Salicylic, Cationic For Wash-Off). This product is suitable because it is in liquid form, water-soluble, and designed for wash-off formulations like soap.
This liquid product contains 40% active Salicylic Acid.
Recommended Usage Rate:
The general usage rate for Salicylic Acid in wash-off products is typically 1-2% active Salicylic Acid in the final product.
Based on the Liquid Salicylic Acid (40% Active Salicylic, Cationic For Wash-Off) product, the recommended usage rate is 2.5% to 5% of the liquid product in your soap formulation. This corresponds to:
- 2.5% of the liquid product: Provides 1% active Salicylic Acid in the final soap.
- 5% of the liquid product: Provides 2% active Salicylic Acid in the final soap.
Calculation for your soap:
Per 80g bar of soap:
- To get 1% active Salicylic Acid (using 2.5% of the liquid product): Use 2.5% of 80g = 2 grams of Liquid Salicylic Acid (40% Active Salicylic, Cationic For Wash-Off).
- To get 2% active Salicylic Acid (using 5% of the liquid product): Use 5% of 80g = 4 grams of Liquid Salicylic Acid (40% Active Salicylic, Cationic For Wash-Off).
Per 1kg (1000g) of soap base:
- To get 1% active Salicylic Acid (using 2.5% of the liquid product): Use 2.5% of 1000g = 25 grams of Liquid Salicylic Acid (40% Active Salicylic, Cationic For Wash-Off).
- To get 2% active Salicylic Acid (using 5% of the liquid product): Use 5% of 1000g = 50 grams of Liquid Salicylic Acid (40% Active Salicylic, Cationic For Wash-Off).
Always mix the Liquid Salicylic Acid thoroughly into your soap base according to your formulation process.
