The Ordinary Salicylic Acid 2% Anhydrous Solution is a water-free, oil-soluble treatment designed specifically for blemish-prone skin. This concentrated formula contains 2% salicylic acid to help clear congested pores, reduce blemishes, and improve skin texture. As this is a direct acid product, it should not be used on sensitive, peeling or compromised skin. A patch test is recommended before first use. The anhydrous (water-free) formula makes it suitable for those who prefer oil-based treatments. When using this product, it's important to apply sunscreen during the day as BHAs can increase skin sensitivity to UV radiation. For best results, use in the evening as part of your skincare routine.