A high-melting-point mineral wax used to provide structural integrity and thermal stability to stick-based cosmetics. This ingredient functions as a potent occlusive agent, forming a protective barrier on the skin’s surface to mitigate moisture loss without a greasy residue.
- INCI Name:
- Ceresin
- Chemical/Scientific Name:
- Purified Ozokerite; Complex mixture of hydrocarbons
- Common Aliases:
- Earth Wax, Mineral Wax, Cerosin
| Category: | Texture Enhancers |
| Source Origin: | Mineral (Naturally occurring ozokerite) |
| Comedogenic Rating: | 0 |
| Primary Industries: | Cosmetics, Pharmaceuticals, Dental Supplies |
| Solubility: | Oil-soluble |
At a Glance: Properties & Effects
| Texture Enhancement: | |
| Formula Stability: | |
| Barrier Repair: | |
| Irritation Risk: |
Primary Benefits:
- Prevents emulsion separation by stabilizing the oil phase.
- Increases the melting point of stick products, ensuring they remain solid in warm climates.
- Reduces the brittleness of waxes like Candelilla Wax, improving stick flexibility.
- Acts as a physical occlusive to prevent dehydration.
Potential Risks:
- May feel heavy in high concentrations if not balanced with lightweight emollients.
- Requires oil-based cleansing for thorough removal due to its water-insoluble nature.
Biological Action & Cosmetic Profile
Saturated hydrocarbon chains comprise the primary structure of this mineral derivative, making it exceptionally stable against oxidative rancidity. Unlike vegetable waxes containing esters, these hydrocarbons do not degrade when exposed to light or air. When applied to the epidermis, the wax molecules are too large to penetrate the stratum corneum. Instead, they arrange into a cohesive, hydrophobic film that mimics the skin’s natural lipid barrier. This physical shield effectively traps water within the skin, a process vital for treating xerosis and maintaining elasticity.
Rheological properties are significantly enhanced when this wax is incorporated into anhydrous formulations. It functions as a “structure builder,” creating a crystalline lattice that holds liquid oils in place. This prevents “sweating” in lipsticks—a common defect where oils migrate to the surface. Furthermore, the ingredient modifies the crystalline structure of other waxes, resulting in a smoother, more uniform application during use. Its non-polar nature ensures compatibility with a wide range of cosmetic lipids, including Squalane and various silicone derivatives.
Broader Applications & Origins
Geological deposits of ozokerite serve as the raw material for this ingredient. Through a process of treatment with sulfuric acid and filtration through charcoal, the crude mineral wax is refined into a high-purity substance. While it shares some similarities with Paraffin Wax, the refined mineral version typically possesses a finer crystalline structure and higher tenacity. Beyond skincare, its ability to provide a moisture-proof seal makes it valuable in pharmaceutical salves and dental molding waxes.
Routine Integration
Synergies:
- Combines effectively with Petrolatum to create medical-grade occlusive ointments.
- Works alongside Mineral Oil to adjust the viscosity and spreadability of heavy creams.
- Pairs with Beeswax to optimize the “payoff” and glide of color cosmetics.
Conflicts:
- Generally exhibits no chemical conflicts; however, it may impede the absorption of water-based actives if applied in a thick layer beforehand.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel has categorized this mineral wax as safe for use in cosmetics. Extensive toxicological testing confirms that it is non-sensitizing and non-irritating, even for those with compromised skin barriers. Because it is chemically inert, it does not react with other active ingredients in a formula. Clinical data supports its use in hypoallergenic products, as its lack of biological activity minimizes the potential for adverse immune responses. Regulatory bodies, including the SCCS (Scientific Committee on Consumer Safety), recognize its safety profile in leave-on applications such as lip care and facial moisturizers.
Is Ceresin vegan and cruelty-free?
Since it is derived from mineral sources (earth wax) rather than animal by-products, the ingredient is considered vegan. Most modern suppliers adhere to cruelty-free standards, though consumers should verify the final brand’s certifications.
Will this ingredient cause acne or clogged pores?
Dermatological assessments typically assign this wax a comedogenic rating of 0. Because the molecules are inert and too large to enter the pore lining, they do not contribute to the formation of comedones.
How does it differ from paraffin?
While both are hydrocarbons, this material is derived from ozokerite and generally has a higher melting point and a more microcrystalline structure. This makes it more effective at hardening sticks and preventing them from becoming mushy compared to standard paraffin.