Understanding pH in Your Formulation

Based on the information provided, the low pH of 3.8 in your formula is caused by Pro-Cysteine.

Perfect-C™ (Ascorbyl Tetraisopalmitate) is not the ingredient causing the low pH. Perfect-C™ is an oil-soluble Vitamin C derivative that is typically used in formulations with a pH range of 5.0-5.5 for optimal stability and effectiveness.

Pro-Cysteine is known to be highly acidic, which is why it significantly lowers the pH of a formulation. When using Pro-Cysteine, it is necessary to use an alkaline substance to adjust the pH to the desired range.

If you are using Pro-Cysteine in your formula, the choice of pH adjuster depends on the concentration of Pro-Cysteine:

• If using Pro-Cysteine at a concentration of more than 2%, Sodium Hydroxide is recommended for pH adjustment because it provides sufficient alkalinity.
• If using Pro-Cysteine at a concentration of 1-2%, Triethanolamine 99% can be used to help adjust the pH.

When incorporating Perfect-C™ into other formulas, you should aim for a pH range of 5.0-5.5, as specified in its usage guidelines. If your formula contains acidic ingredients like Pro-Cysteine, you will need to use an appropriate alkaline pH adjuster (like Sodium Hydroxide or Triethanolamine, depending on the acidic component and its concentration) to bring the pH into the desired range for Perfect-C™.