Ascorbic Acid is the pure form of vitamin C used to support brighter-looking skin, improve uneven tone, and antioxidant protection.
It works best in low pH water-based systems where it can stay active, and it is commonly used in brightening serums, antioxidant boosters, and targeted tone correction treatments.
Because it oxidises easily, we recommend designing the full formula around stability: low pH, minimal metals, smart packaging, and an antioxidant support system.
FEATURES
- Brightening support – improves the look of dullness and uneven tone.
- Antioxidant power – helps protect skin from oxidative stress.
- High performance vitamin C – pure, active form when kept stable.
- Best in low pH systems – requires a properly designed acidic formula.
BEST FOR
- Vitamin C serums
- Antioxidant boosters
- Brightening toners
- Spot correction treatments
- Low pH gel serums
FORMULATION GUIDELINES
| INCI | Ascorbic Acid |
|---|---|
| Type | Vitamin C active (water soluble, low pH required) |
| Solubility | Water soluble |
| Use Rate | 5–20% typical. 10–15% is a common sweet spot for high-performance vitamin C serums. |
| pH Compatibility | We recommend finished product pH 2.8–3.5 for best activity and stability. |
| Temperature Tolerance | We recommend dissolving with minimal heat (room temperature to 40°C) and avoiding prolonged heating. |
| Pro Tip | Use deionised water, add a chelator, and keep metals out of the process to reduce oxidation. Build the system first, dissolve ascorbic acid fully, then adjust pH carefully and re-check after 24 hours. Choose packaging that limits oxygen exposure and avoid clear dropper bottles for high-strength formulas. If the formula yellows quickly, you need better oxygen control, better chelation, or a lower processing stress design. |
| Appearance | White crystalline powder |
| Stability Notes | Oxidation shows as yellowing to brown discoloration and odour shift. Design for low pH, low oxygen exposure, and good chelation. |
| Storage | Keep sealed, cool, and dry. Protect from humidity, heat, and direct sunlight. |
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