Citric Acid is a multifunctional organic acid used mainly to reduce pH in cosmetic formulas.
It helps you bring cleansers, toners, serums, and emulsions into a skin-friendly pH range and can also support stability by binding small amounts of metal ions.
It is commonly used as a citric acid solution for easier, more controlled pH adjustment during batching.
FEATURES
- pH adjuster – lowers pH quickly and predictably.
- Supports stability – mild chelation support that can reduce metal-driven instability.
- Water soluble – dissolves easily and is simple to use in production.
- Widely compatible – works in most water-based skincare and cleansing systems.
BEST FOR
- pH adjustment
- Toners
- Serums
- Cleansers
- Lotions and creams
- Shampoos and body wash
FORMULATION GUIDELINES
| INCI | Citric Acid |
|---|---|
| Type | pH adjuster (acidifier) + mild chelating helper |
| Solubility | Water soluble |
| Use Rate | q.s. to pH (commonly 0.05–0.5% depending on base formula and target pH) |
| Best Use | Lowering pH in water-based formulas |
| Temperature Tolerance | Stable under normal processing |
| Pro Tip | Prepare a 10–20% citric acid solution in water, then use it to adjust pH in small additions. Always mix thoroughly, then re-check pH after 10–20 minutes, because some systems drift as polymers and surfactants equilibrate. In surfactant systems, adjust pH near the end after viscosity is close, because pH can affect salt curve and clarity. |
| Appearance | White crystalline powder |
| Stability Notes | Over-acidifying can reduce viscosity or destabilise some polymer systems. Adjust in steps and stop once you hit the target pH. |
| Storage | Keep sealed, cool and dry. Protect from humidity. |
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