Myrj™ S40-PA-(SG) (PEG-40 Stearate) is a white to off-white waxy solid that punches well above its weight in the emulsifier category — a nonionic surfactant from Croda’s trusted Myrj series that brings both emulsifying and solubilizing capability to a wide range of cosmetic formulation systems. Its stearate ester backbone gives it a naturally waxy, skin-compatible character, while the 40-unit PEG chain provides the hydrophilicity needed to bridge oil and water phases effectively in O/W emulsions.
In practice, it’s the kind of emulsifier that makes formulations feel finished. In creams and lotions, it contributes to a smooth, creamy consistency that spreads evenly and absorbs cleanly. In serums and lighter emulsions, it helps maintain clarity and stability without adding heaviness. As a solubilizer, it enables the incorporation of oils, fragrances, and oil-soluble actives into water-based systems — keeping formulations clear and uniform over time. Its waxy solid form melts cleanly into the oil phase, making it straightforward to work with at standard processing temperatures. A reliable, versatile emulsifier for professional cosmetic formulation.
Key Benefits
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Strong O/W Emulsification – effectively blends oil and water phases into stable, uniform emulsions
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Improved Texture & Consistency – enhances creaminess, smoothness, and spreadability in finished formulations
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Solubilizing Ability – helps incorporate oils, fragrances & actives into water-based systems
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Stability Enhancement – prevents ingredient separation and extends product shelf life
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Versatile – suitable for creams, lotions, serums, cleansers & cosmetic emulsions
Applications
- Creams, lotions & moisturizers
- Serums & lightweight emulsions
- Cleansers & face washes
- Cosmetic emulsions & personal care formulations
- Fragrance & active solubilization systems
Recommended Usage Levels
| Application |
Usage Level |
| Creams & Lotions |
1% – 5% |
| Emulsions |
1% – 6% |
| Solubilizer Systems |
1% – 4% |
Technical Profile
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INCI: PEG-40 Stearate
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Trade Name: Myrj™ S40-PA-(SG)
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Manufacturer: Croda
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Appearance: White to off-white waxy solid / flakes
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Type: Nonionic emulsifier / solubilizer
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Function: Emulsifier, solubilizer, stabilizer
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Solubility: Dispersible in water and oils
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Grade: Cosmetic
Formulation Tips
Add to the oil phase and heat to 70–75°C alongside other wax-phase ingredients — the waxy solid form melts readily at these temperatures. For best emulsion stability, combine with a co-emulsifier such as Cetearyl Alcohol or GMS to build a more robust lamellar emulsifier system. In solubilizer applications, pre-mix with the oil or fragrance before adding to the water phase for the clearest result. Compatible with most cosmetic actives, humectants, and preservative systems across a wide pH range.
