Description
Description
Lanolin is a complex wool-derived lipid composed primarily of sterol esters, fatty alcohols, and long-chain acids. Unlike simple triglyceride oils, it has exceptional water-absorption capacity and can form semi-solid water-in-oil structures, which explains its long-standing use in protective balms, lip products, and rich dry-skin systems.
Chemical & Technical Profile
| INCI / Identity | Lanolin |
|---|---|
| CAS No. | 8006-54-0 |
| Molecular Formula | Complex mixture of sterol esters, fatty alcohols, acids, and hydrocarbons |
| Molecular Weight | Not applicable |
| Physical Form | Yellow to amber semi-solid wax |
| Solubility | Insoluble in water; capable of absorbing significant water into W/O structures |
| Functional Category | Occlusive emollient / water-absorbing lipid |
Mechanism of Action / Technical Function
The emollient mechanism combines occlusion, lubrication, and interfacial water absorption. Sterol and alcohol fractions help lanolin incorporate water into the lipid phase, while the waxy matrix reduces transepidermal water loss by forming a persistent hydrophobic film. Its high substantivity also contributes to long-lasting skin and lip feel.
Formulation Guidelines
Melt into the oil phase with other waxes and emollients. Use enough heat for complete liquefaction but avoid unnecessarily prolonged high-temperature exposure, which can intensify odor and color. In W/O systems, lanolin can assist water uptake but should not be treated as a complete emulsifier without stability validation. In lip products, balance tack and drag with lower-viscosity oils.
Compatibility & Stability
Monitor odor, color, peroxide development, graininess, and phase stability. Natural lanolin may contain trace sensitizing components; highly refined grades reduce but do not eliminate formulation considerations. Antioxidant support can improve odor stability.
R&D, Scale-Up & Quality Control
R&D qualification of Lanolin should include Lanolin color, odor, consistency, and oxidation indicators where applicable. For manufacturing scale-up, define and control melting temperature, hot-hold duration, and blending with waxes/emollients rather than transferring only the ingredient percentages. The batch is technically acceptable when no rancid odor, graininess, or phase instability develops in the rich lipid system.
Packaging, Shipping & Storage
Supplied in a sealed container appropriate to the semi-solid material. Store tightly closed, cool, dry, and away from strong heat and oxidizing conditions.
Estimated Delivery: 10–15 Business Days
Applications
Balms, lip care, salves, hand creams, barrier products, W/O emulsions, hair conditioners, and rich dry-skin formulations.
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