Mineral oil contributes to the stability of cosmetic raw materials in several key ways:

1. Chemical Stability
Mineral oil is highly refined and chemically stable. It does not oxidize or go rancid over time, which helps maintain the effectiveness and quality of cosmetic raw materials. This stability is particularly important for products with a long shelf life.

2. Non-Reactivity
Mineral oil is inert, meaning it does not react with other ingredients in the formulation. This makes it an ideal base ingredient for a wide range of cosmetic raw materials, as it does not interfere with the performance of other active ingredients.

3. Emollient and Occlusive Properties
Mineral oil acts as an occlusive moisturizer, forming a protective barrier on the skin’s surface to prevent water loss. This property not only enhances the moisturizing effect but also contributes to the overall stability of the product by maintaining a consistent texture.

4. Compatibility with Other Ingredients
Mineral oil is highly compatible with a wide range of other cosmetic ingredients, including emulsifiers, preservatives, and fragrances. This versatility allows formulators to create stable and effective mixtures.

5. Regulatory Compliance
The use of mineral oil in cosmetic raw materials is regulated to ensure safety. In Europe, for example, mineral oils used in cosmetics must comply with specific purity specifications regarding polycyclic aromatic hydrocarbons (PAHs) and other safety requirements. This regulatory oversight ensures that the mineral oil used in cosmetics is of high quality and does not pose health risks.

6. Cost-Effectiveness
Mineral oil is generally less expensive than many natural oils, making it a cost-effective choice for cosmetic formulations. This allows manufacturers to produce stable and effective products at a lower cost.

7. Non-Comedogenic
Mineral oil is considered non-comedogenic, meaning it does not clog pores. This property makes it suitable for use in products designed for acne-prone skin, further enhancing its stability and safety profile.

Conclusion
Mineral oil’s chemical stability, non-reactivity, emollient properties, compatibility with other ingredients, regulatory compliance, cost-effectiveness, and non-comedogenic nature make it a valuable and stable component in cosmetic formulations.