Understanding pH Adjustment for Creams with Sym-White™

Based on your question and the previous response, here is information regarding pH adjustment for your cream formulation containing Sym-White™ (Phenylethyl Resorcinol):

What are pH Calibration Buffers?

pH Calibration Buffers 4.00 and 6.86 are used to calibrate your pH meter. Over time, pH meters can become less accurate, and using calibration buffers helps reset the meter to ensure it provides precise pH readings. They are not ingredients to add to your cream to change its pH.

Adjusting pH for Sym-White™ Formulations

Sym-White™ (Phenylethyl Resorcinol) is most stable and effective in a cream formulation with a pH range of 4-5. To achieve this, you should:

1. Prepare your cream formulation according to your recipe.
2. Once the cream is fully mixed, measure its pH using a pH meter or pH paper.
3. If the measured pH is higher than 5, you need to lower it. You can use a weak acid like Citric Acid or Lactic Acid. Add a very small amount gradually, mix thoroughly, and re-measure the pH. Repeat until the pH is within the 4-5 range.
4. If the measured pH is lower than 4, you need to raise it. You can use a weak base like Triethanolamine. Add a very small amount gradually, mix thoroughly, and re-measure the pH. Repeat until the pH is within the 4-5 range.

Always adjust pH slowly and measure frequently, as adding too much acid or base can drastically change the pH and may affect the stability or texture of your cream.