VC-SAP

VC-SAP is a highly sought-after active ingredient found in advanced cosmetic skincare products. As a stable derivative of vitamin C, it plays a crucial role in protecting the skin and enhancing its overall appearance.
By breaking down enzymes within the skin, Sodium Ascorbyl Phosphate releases active vitamin C, thereby exerting potent antioxidant properties. This mechanism enables it to effectively safeguard cells from the detrimental effects of free radicals, thereby preventing cellular damage.

INCI NAME:Sodium Ascorbyl Phosphate

INCI NAME:Sodium Ascorbyl Phosphate
Molecular weight:322.05
CAS:66170-10-3

Molecular Formula C6H6Na3O9P
Appearance:  White-to off-white powder

Sodium Ascorbyl Phosphate (SAP) is a stable, water-soluble derivative of Vitamin C. It is the sodium salt of ascorbyl phosphate, a stabilized form of ascorbic acid (Vitamin C), developed to overcome the oxidative instability and degradation issues associated with pure Vitamin C. Due to its increased stability, SAP is commonly used in cosmetic, pharmaceutical, and dermatological formulations for its skin benefits.


Mechanism of Action:

  1. Antioxidant Protection:
    Like other Vitamin C derivatives, SAP acts as a potent antioxidant by scavenging free radicals and reactive oxygen species (ROS). These molecules, generated by environmental stressors such as UV radiation, pollution, and smoke, can cause skin aging and damage. By neutralizing these free radicals, SAP helps reduce oxidative damage, supporting healthier and more resilient skin.

  2. Melanin Inhibition and Skin Brightening:
    SAP inhibits the enzyme tyrosinase, which is responsible for the production of melanin. By reducing melanin production, it can help lighten hyperpigmentation, age spots, acne scars, and other types of skin discoloration, resulting in a more even and radiant complexion.

  3. Collagen Synthesis:
    SAP, like other Vitamin C derivatives, promotes collagen synthesis. Collagen is a key structural protein in the skin that provides strength and elasticity. By stimulating collagen production, SAP helps improve skin texture, reduce fine lines and wrinkles, and maintain skin firmness.

  4. Skin Repair and Healing:
    Vitamin C is crucial for wound healing and tissue repair. SAP contributes to faster recovery by promoting the regeneration of skin cells and supporting the repair of damaged tissues. This makes SAP beneficial in post-procedure skincare (e.g., after laser treatments or minor skin surgeries).

  5. Stability and Skin Penetration:
    SAP is a more stable alternative to pure ascorbic acid. It remains effective in a variety of formulations, particularly those involving aqueous systems, due to its resistance to oxidation. Moreover, SAP has good skin penetration, allowing it to deliver the benefits of Vitamin C effectively to deeper skin layers.


Applications in Cosmetic and Pharmaceutical Formulations:

  1. Brightening and Whitening Products:

    • Serums and Creams: SAP is widely used in products designed to address hyperpigmentation, age spots, melasma, and post-acne scars. It helps to brighten and even out skin tone by inhibiting the formation of excess melanin.
    • Skin Tone Correctors: Products containing SAP are commonly marketed as skin brighteners and tone correctors for individuals with uneven pigmentation or dull skin.
  2. Anti-Aging Products:

    • Anti-wrinkle Creams: SAP’s collagen-boosting effect makes it ideal for inclusion in anti-aging products aimed at reducing the appearance of fine lines and wrinkles.
    • Firming Products: SAP also promotes skin elasticity and firmness, supporting formulations that target sagging skin and loss of skin vitality.
  3. Acne Treatment Products:

    • Post-Acne Hyperpigmentation: SAP is often included in acne treatment regimens to fade post-inflammatory hyperpigmentation (PIH) caused by acne lesions.
    • Acne Scar Treatment: Its collagen-boosting properties help with skin regeneration and reducing the appearance of acne scars over time.
  4. Sensitive Skin Formulations:

    • Due to its gentle nature compared to pure ascorbic acid, SAP is suitable for sensitive skin and can be found in formulations designed for delicate or reactive skin types.
  5. Skin Repair and Healing Products:

    • Wound Healing and Post-Treatment Care: SAP can be used in pharmaceutical applications, such as wound healing ointments, scar treatment creams, and after-care products following dermatological procedures (e.g., chemical peels, laser treatments).

Formulation Considerations:

  1. Stability:
    SAP is more stable than pure ascorbic acid (ascorbic acid is prone to oxidation and degradation), making it an excellent choice for water-based formulations. However, although it is more stable, it should still be stored in airtight containers and kept away from direct sunlight to maximize its shelf life.

  2. pH Range:
    SAP is most stable at a slightly neutral to alkaline pH (around 7 to 8). This pH range supports the integrity of the ingredient, making it compatible with a variety of other actives and suitable for a wide range of skincare formulations.

  3. Compatibility with Other Ingredients:

    • Compatible Ingredients: SAP is compatible with many active ingredients commonly used in skincare, such as peptides, niacinamide, hyaluronic acid, and sunscreens.
    • Incompatible Ingredients: SAP is generally stable when combined with other Vitamin C derivatives but may lose potency when combined with strong acids (such as pure ascorbic acid) or products with a very low pH.
  4. Delivery Systems:
    Incorporating SAP into advanced delivery systems such as liposomes or encapsulation can enhance its skin penetration and stability. This can provide sustained release and improve the overall efficacy of the formulation.


Safety Profile:

  • Irritation:
    SAP is typically well-tolerated by most skin types, including sensitive skin. It is less likely to cause irritation compared to pure ascorbic acid. However, as with any active ingredient, a patch test is recommended for individuals with sensitive or reactive skin.

  • Regulatory Status:
    Sodium Ascorbyl Phosphate is widely accepted for use in cosmetic formulations and has been reviewed for safety by various international regulatory bodies such as the FDA, European Commission (EC), and the Cosmetic Ingredient Review (CIR). It is considered safe for topical use in concentrations up to 2-5%.


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