Lanolin (CAS 8006-54-0) Cosmetic Raw Material Introduction
Lanolin (CAS 8006-54-0), a natural wax-like substance extracted from the wool of sheep (Ovis aries), is a cornerstone raw material in the cosmetic and personal care industry. Obtained through the scouring and purification of wool, cosmetic-grade lanolin is a pale yellow to off-white semi-solid with a mild, characteristic odor. Its unique molecular composition—primarily a complex mixture of esters, alcohols, and fatty acids—closely resembles the sebum of human skin, endowing it with exceptional biocompatibility and moisturizing capabilities. As a multifunctional ingredient, it acts as an emollient, occlusive moisturizer, and skin barrier enhancer, making it indispensable in a wide range of skincare, lip care, and hair care formulations.
A key advantage of lanolin lies in its ability to form a breathable protective film on the skin’s surface, reducing transepidermal water loss (TEWL) without clogging pores. It can absorb and retain up to twice its weight in water, delivering long-lasting hydration to dry, rough, or chapped skin. Additionally, its compatibility with most cosmetic ingredients (including oils, fats, and surfactants) makes it a versatile additive in both water-in-oil (W/O) and oil-in-water (O/W) emulsions. It is particularly valued in premium formulations for its ability to enhance the texture, spreadability, and stability of products.
Technical Specifications
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Parameter
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Specification
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Test Method
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CAS Number
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8006-54-0
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Chemical Abstracts Service
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Appearance
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Pale yellow to off-white semi-solid
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Visual & Olfactory Inspection
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Melting Point
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38–42°C
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USP <741>
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Acid Value
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≤1.0 mg KOH/g
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USP <401>
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Saponification Value
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90–105 mg KOH/g
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USP <401>
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Iodine Value
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18–36 g I₂/100g
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USP <401>
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Moisture Content
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≤0.25%
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Karl Fischer Titration
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Gardner Color
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≤10
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ASTM D1544
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Density (20°C)
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0.930–0.945 g/cm³
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Pycnometer Method
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Flash Point
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≥200°C
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Closed Cup (ASTM D93)
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Heavy Metals
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≤10 ppm
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ICP-MS
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Lanolin is widely applied in cosmetic formulations such as cold creams, lip balms, hand creams, anti-chapping products, hair conditioners, and baby care items. It is also used in medical cosmetics to soothe and repair damaged skin barriers. For storage, it should be kept in a cool, dry, and well-ventilated area below 25°C, away from direct sunlight and heat sources. When properly stored in sealed packaging, its shelf life is 24 months, complying with USP, EP, and FDA standards for cosmetic use.
This ingredient’s natural origin, superior moisturizing performance, and broad compatibility make it a preferred choice for formulators aiming to create high-quality, skin-friendly products. Its safety profile is well-documented, with no known irritancy or sensitization issues for most users when used in standard cosmetic concentrations.
