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Moumoujus

PETROLATUM.

Essential CAS 8009-03-8 / ANTISTATIC, SKIN CONDITIONING - EMOLLIENT

Petrolatum is a highly effective occlusive agent that creates a protective, water-resistant barrier on the skin's surface. This barrier is instrumental in preventing transepidermal water loss (TEWL), thereby sealing in essential moisture and fostering an optimal environment for skin healing and repair. It simultaneously functions as an emollient, promoting noticeably softer and smoother skin.

Summary

Emollient Occlusive

Science

Mechanism of Action

As a potent occlusive agent, Petrolatum forms a robust, hydrophobic film across the skin's outermost layer. This physical barrier profoundly reduces transepidermal water loss (TEWL), effectively locking in hydration and sustaining a moist environment crucial for epithelization. Its emollient properties also contribute to a smoother skin texture by filling intercellular spaces in the stratum corneum.

Research

Clinical Evidence

High confidence
Effective range 30–100%
Optimal

30%

Key findings

  1. 01 Clinical data indicates that topical formulations with 44.28% petrolatum are highly effective at maintaining skin hydration and facilitating the healing of minor skin abrasions by forming a protective barrier.
  2. 02 Products containing at least 30% petrolatum are recognized as the most effective occlusive moisturizers available for preventing transepidermal water loss and offering temporary protection for chafed, chapped, or cracked skin.
  3. 03 Consistent application of petroleum jelly has demonstrated a 170% improvement in skin hydration over two weeks, proving more effective at reducing TEWL than many conventional commercial moisturizers.

Transparency

Dusting Analysis

Not commonly dusted

Petrolatum is a highly functional ingredient with well-established efficacy at specific concentrations (30-100% for OTC skin protectant claims). It is not typically 'dusted' at ineffective levels but rather formulated at concentrations where its occlusive and emollient benefits are fully realized.

The Formula

Formulation

Solubility
Oil
Optimal pH 4.5 – 8
0 7 14

Stability

Petrolatum exhibits inherent stability due to its unreactive hydrocarbon composition. Potential stability issues, such as discoloration and odor, are primarily linked to impurities that can oxidize upon light exposure. The integration of antioxidants (e.g., butylated hydroxyanisole, butylated hydroxytoluene, or alpha-tocopherol) can effectively mitigate this oxidation. Avoid prolonged heating above 70°C.

Synergies

  • Antioxidants (e.g., BHA, BHT, alpha-tocopherol) to enhance stability and prevent oxidation of impurities.

Conflicts

  • Strong oxidizing agents
  • Propylene (due to its plasticizing effect on polypropylene)

Safety

Safety Profile

CIR Status
Safe as used
Max tested
100%
Sensitization risk Low

The FDA approves Petrolatum as an over-the-counter (OTC) skin protectant at concentrations from 30% to 100%. When refined to meet USP grade standards, it is considered non-carcinogenic with no known health concerns. Safety concerns arise only from inadequate refinement, which may lead to carcinogenic polycyclic aromatic hydrocarbons (PAHs), with the EU limiting PAH content in cosmetics to 0.005%.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
No Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Essential

Petrolatum is an essential and highly effective occlusive agent, clinically proven to prevent moisture loss, promote healing, and protect compromised skin, making it a cornerstone for barrier repair and intense hydration.

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