
THE STORY OF NANOESTER OS
Nanoester OS: The UV-B Absorbing Emollient for Smooth, Sun-Safe Formulations
Nanoester OS (also known as Ethylhexyl Salicylate) is a UV-B absorbing organic sun filter commonly used in sunscreens and daily skincare products.
It provides broad photostability, enhances UV protection, and offers a light emollient feel, improving spreadability of sunscreens and lotions.
Widely used in sun creams, daily moisturizers, lip balms, makeup, and outdoor skincare.
A Stable Ester Formed by Reacting Salicylic Acid with 2-Ethylhexanol
Nanoester OS is produced through esterification of:
• Salicylic Acid (aromatic acid)
• 2-Ethylhexanol (alcohol)
This controlled reaction produces a clear, hydrophobic, UV-B absorbing ester ideal for cosmetic formulations.
TRCkem supplies high-purity, photostable Nanoester OS suitable for global sunscreen regulations.
Protect. Enhance. Smooth.
Nanoester OS offers multiple formulation benefits:
✅ Provides UV-B protection (280–320 nm)
✅ Adds photostability to other UV filters
✅ Enhances spreadability & skin feel
✅ Functions as a solvent/emollient in sunscreen systems
✓ Compatible with most chemical UV filters
Used in: sunscreens, SPF lotions, facial creams, BB/CC creams, lip balms, body sprays, and outdoor swimming/sport formulations.
Photostable & Skin-Friendly — Designed for Modern SPF Formulations
• Typical use level: 3–10% in sunscreens
• Oil-soluble → add to oil phase of emulsions
• Works synergistically with:
– Octocrylene
– Avobenzone
– OMC (Octyl Methoxycinnamate)
• Stable under sunlight and heat
• Safe for most skin types when used within regulated limits
• Store in cool, dark conditions to maintain purity
Formulator’s Queries, We Answered
1. What is NANOESTER OS?
NANOESTER OS is a high-purity, nano-enhanced grade of Octyl Salicylate, designed for advanced sun care and skincare formulations. It functions as an oil-soluble UVB filter and solubilizer, offering enhanced sun protection, improved photostability, and compatibility with other sunscreen actives. NANOESTER OS is commonly used in SPF-rated products, daily moisturizers, and color cosmetics for its dual role in sun defense and formulation stability.
2. What is the CAS Number and INCI Name of NANOESTER OS?
CAS Number: 118-60-5
INCI Name: Octyl Salicylate
3. What are the benefits of using NANOESTER OS in personal care products?
UVB Protection: Absorbs UVB rays in the 280–320 nm range to help prevent sunburn.
Photostabilizer: Enhances the stability of other sunscreen actives such as Avobenzone.
Oil-Soluble and Emollient: Adds a smooth, non-greasy feel to formulations.
Versatile Solubilizer: Helps dissolve other lipophilic ingredients, improving formulation clarity.
Mild and Non-Irritating: Suitable for sensitive skin and daily-use sun care products.
4. What are the common applications of NANOESTER OS in personal care?
Sunscreens and Sunblocks: Primary or supporting UVB filter.
Moisturizers with SPF: Enhances sun protection and skin feel.
BB Creams and Foundations: Provides UV protection with a silky finish.
Lip Balms with SPF: Protects delicate skin from UV rays.
Leave-On Skincare: Adds UV protection without affecting formulation aesthetics.
5. Is NANOESTER OS safe for use in personal care products?
Yes, NANOESTER OS is approved for use in personal care and cosmetic products by regulatory authorities such as the FDA and EU. It is generally used at concentrations up to 5% (in the U.S.) and is considered safe when formulated within regulated limits.
6. Can NANOESTER OS cause skin irritation?
NANOESTER OS is typically well-tolerated and has a low irritation potential, making it suitable for sensitive skin types. However, as with all active ingredients, it is advised to conduct patch testing before first-time use in finished products.