Sodium Ascorbyl Phosphate (SAP)
A stable, water-soluble derivative of Vitamin C that provides antioxidant protection, brightens the skin, and promotes collagen synthesis without the instability of pure ascorbic acid.
Sodium Ascorbyl Phosphate (SAP) is a stable, water-soluble form of Vitamin C that offers the same brightening and antioxidant benefits as pure ascorbic acid, but with improved stability. Unlike ascorbic acid, SAP remains effective in formulations at a broader pH range and is less prone to oxidation, making it an excellent choice for inclusion in skincare products.
SAP promotes collagen production, brightens the skin, and protects against oxidative stress, helping combat the visible signs of aging, such as fine lines, wrinkles, and hyperpigmentation. This ingredient is ideal for sensitive skin types due to its gentle nature, providing the benefits of Vitamin C without irritation.
It is commonly used in serums, moisturizers, and other brightening treatments for its ability to enhance skin tone, texture, and overall radiance.
FEATURES
- Stable Vitamin C derivative – provides Vitamin C benefits with improved stability and reduced irritation.
- Antioxidant protection – helps neutralize free radicals, reducing oxidative stress and environmental damage.
- Brightening – helps even out skin tone and reduce hyperpigmentation over time.
- Collagen synthesis – promotes collagen production, improving skin texture and elasticity.
- Gentle on sensitive skin – less likely to irritate compared to pure ascorbic acid.
BEST FOR
- Brightening serums
- Anti-aging moisturizers
- Hyperpigmentation treatments
- Sensitive skin formulations
- Skin tone-evening products
- Collagen-boosting treatments
FORMULATION GUIDELINES
| INCI | Sodium Ascorbyl Phosphate |
|---|---|
| Type | Stable Vitamin C derivative, antioxidant, skin-brightening agent |
| Solubility | Water soluble |
| Use Rate | 1.0–3.0% typical for brightening and antioxidant effects. |
| Best Phase | Water phase or cool-down phase (below 40°C) |
| pH Compatibility | Works best in formulations with a pH of 5.0–7.0. |
| Temperature Tolerance | Stable at typical formulation temperatures. Add below 40°C to preserve its full activity. |
| Pro Tip | For enhanced results, combine SAP with other brightening agents like niacinamide or alpha-arbutin. It is also effective in combination with other antioxidants to provide broad-spectrum skin protection. Ensure to test your formulations for pH compatibility, as higher or lower pH may degrade the efficacy of the active. |
| Appearance | White to off-white powder |
| Stability Notes | Stable over a wide pH range, but should be stored in a cool, dry place to preserve its potency. Avoid exposure to light and moisture. |
| Storage | Store in a cool, dry place, away from light and moisture in a tightly sealed container. |
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