The Ordinary Glycolic Acid 7% Toning Solution 240 ml TRUSTPILOT_REVIEWS CERAMIDE 2

CERAMIDE 2

inner elbows

Provides All-Day-Long Comfort & Support

Polyquaternium-7

Now in four new Limited Edition sparkling shades

The Ordinary Glycolic Acid 7% Toning Solution 240 ml TRUSTPILOT_REVIEWS CERAMIDE 2This pH of this formula is approximately 3. 6 and Glycolic Acid has a pKa of 3. 6. The pKa is the most important aspect to consider when formulating with acids as it implies acid availability. When pKa is close to pH, there is an ideal balance between salt and acidity, maximising the effectiveness of the acid and reducing the potential of developing irritation. Higher pH values in such a case would increase the concentration of salt, which counter