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Moumoujus

SODIUM PCA.

Valuable CAS 28874-51-3 / ANTISTATIC, HAIR CONDITIONING, HUMECTANT, SKIN CONDITIONING

Sodium PCA is a crucial natural humectant and a principal component of the skin's Natural Moisturizing Factor (NMF). It excels at drawing and binding water molecules to the skin, effectively hydrating and preventing moisture loss. This ingredient is fundamental for maintaining optimal skin barrier function and overall skin health.

Summary

Humectant Skin Conditioning Barrier Strengthening Antioxidant Anti-inflammatory Hair Conditioning

Science

Mechanism of Action

As a prominent component, constituting approximately 12%, of the skin's Natural Moisturizing Factor (NMF), Sodium PCA operates by attracting water molecules from the surrounding air and firmly binding them to the cells in the stratum corneum, the skin's outermost layer. This mechanism locks in moisture, thereby significantly reducing transepidermal water loss and ensuring deep hydration. Its compact molecular size facilitates efficient penetration into the epidermal layers. Beyond its humectant capabilities, Sodium PCA reinforces the skin's barrier integrity by acting as an 'intracellular glue,' which fortifies cell cohesion and offers protection against external irritants like bacteria and allergens. It further supports enzymatic processes crucial for natural exfoliation, exhibits anti-inflammatory effects by balancing the skin microflora, and provides antioxidant protection against free radical damage.

Research

Clinical Evidence

High confidence
Effective range 0.2–3%
Optimal

1.5%

Key findings

  1. 01 Notably reduced the dryness of the skin.
  2. 02 Increased moisturizing efficacy by more than 25% compared to untreated areas.
  3. 03 Reduced symptoms of eczema by 79% and increased hydration levels by 44% after two weeks of regular usage.

Transparency

Dusting Analysis

Not commonly dusted

Sodium PCA is a foundational component of the skin's Natural Moisturizing Factor with well-documented efficacy, making it a genuinely beneficial ingredient rather than one prone to 'dusting' or exaggerated claims. Its established role in hydration and barrier support is consistently observed at standard usage concentrations.

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 6
0 7 14

Stability

For optimal stability and efficacy, Sodium PCA should be formulated within a pH range of 5.0 to 6.0, though it remains effective within a broader range of 4.5 to 7.0. It is a water-soluble ingredient and should always be incorporated into the water phase of cosmetic formulations.

Synergies

  • Other Natural Moisturizing Factor (NMF) components (e.g., amino acids, hyaluronic acid, ceramides) for comprehensive hydration and barrier reinforcement.

Conflicts

  • Nitrosating agents (e.g., DEA, TEA), due to the potential formation of carcinogenic nitrosamines under light or heat.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
2.5%
Pregnancy
Safe
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed its safety for use in cosmetics. However, due to the potential formation of carcinogenic nitrosamines under light or heat, Sodium PCA must not be combined with nitrosating agents like DEA or TEA in formulations. While generally non-irritating, non-sensitizing, and non-comedogenic at typical use concentrations, rare instances of mild irritation or allergic reactions have been reported in individuals sensitive to specific amino acids like proline.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

Sodium PCA is a highly valuable, well-researched humectant and NMF component, offering robust hydration, barrier support, and broad skin compatibility without significant safety concerns at recommended concentrations.

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References

Sources