Microcrystalline Wax – Detailed Description
Microcrystalline Wax is a refined petroleum-derived wax known for its fine crystal structure, high viscosity, and excellent flexibility. Compared to paraffin wax, it has smaller crystals and a higher melting point, which gives it superior binding, plasticity, and moisture-barrier properties. These characteristics make microcrystalline wax an important ingredient in cosmetic, personal care, pharmaceutical, and industrial applications.
In cosmetic formulations, microcrystalline wax is valued for its ability to improve texture, stability, and structure. It helps products maintain shape, enhances consistency, and contributes to a smooth, creamy feel. Its flexibility allows it to blend well with oils, butters, and other waxes, making it ideal for sticks, balms, and anhydrous products.
Chemical & Identification Details
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INCI Name: Microcrystalline Wax
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CAS Number: 63231-60-7
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Chemical Nature: Mixture of high-molecular-weight saturated hydrocarbons
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Chemical Formula: Not a single defined formula (complex hydrocarbon mixture)
Physical Properties
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Appearance: White to off-white solid wax
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Odor: Odorless or very mild
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Texture: Flexible, slightly tacky
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Melting Range: Typically 60–90 °C (grade dependent)
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Solubility: Insoluble in water, soluble in oils and hydrocarbons
Functions & Benefits
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Structuring Agent: Provides firmness and shape to formulations
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Binder: Improves cohesion and prevents crumbling
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Texture Enhancer: Adds smoothness and flexibility
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Stabilizer: Enhances thermal and physical stability
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Moisture Barrier: Helps reduce moisture loss in skin products
Applications
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Lipsticks, lip balms, and solid perfumes
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Creams, ointments, and balms
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Deodorant sticks and sunscreens
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Pharmaceutical topical products
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Industrial uses such as coatings, adhesives, and polishes
Safety & Regulatory
Microcrystalline wax is approved for cosmetic and pharmaceutical use worldwide when refined to appropriate purity standards. It is considered safe, non-reactive, and well tolerated in topical applications.
Summary
Microcrystalline Wax is a versatile, high-performance wax that delivers flexibility, stability, and improved texture. Its unique crystal structure and binding ability make it an essential ingredient in high-quality cosmetic, pharmaceutical, and industrial formulations.

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