1. What is Dimethyl Isosorbide (DMI) and How is it Used in Cosmetics?
Dimethyl Isosorbide (DMI) is a clear, versatile solvent that plays a key role in modern cosmetic formulations. It is primarily used to dissolve and stabilise active ingredients while enhancing their penetration into the skin. This makes it especially valuable for delivering ingredients like Vitamin C derivatives, Ferulic Acid, AHAs, BHAs, and botanical actives more effectively. In skincare, DMI helps improve product performance and stability, making it a staple for formulators who want reliable and consistent results.
2. Dimethyl Isosorbide (DMI) Technical Details and Characteristics
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INCI Name: Dimethyl Isosorbide
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Physical Form: Clear, colourless liquid
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Solubility: Miscible with water, glycols, alcohols, and many oils
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Usage Rate: 1–10% depending on the formula
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pH Stability: Stable between pH 3–9
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Key Properties: Solvent, penetration enhancer, stabiliser for sensitive actives
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Compatibility: Works well with antioxidants, acids, and vitamin derivatives
3. How to Incorporate Dimethyl Isosorbide (DMI) into Formulations
DMI can be used in both water-based and anhydrous systems. It is heat stable and may be added during either hot or cold processing, depending on the needs of your formula. For best results, it is often used to pre-dissolve actives such as Ferulic Acid, Tetrahexyldecyl Ascorbate (THDC), or certain acids before blending them into the main formulation. Always confirm solubility of your chosen active in DMI before use.
4. Where Dimethyl Isosorbide (DMI) is Found in Skincare Products
DMI is widely used in:
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Serums – to stabilise and deliver Vitamin C, antioxidants, and brightening actives
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Creams & Lotions – enhances penetration of active ingredients
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Exfoliating Products – improves solubility and delivery of AHAs/BHAs
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Anhydrous Oils & Balms – helps dissolve and carry fat-soluble actives