Mexoryl Sx
What is Mexoryl Sx?
Mexoryl SX, chemically known as terephthalylidene dicamphor sulfonic acid, is a synthetic organic compound developed as a specialized ultraviolet filter for cosmetic sunscreens. This ingredient belongs to the category of chemical UV absorbers and is particularly effective against UVA radiation in the 320-400 nm range. In formulations, it functions by absorbing harmful UV photons on the skin's surface, then converting that energy into low-level heat that dissipates harmlessly without damaging skin cells. Its water-soluble nature allows incorporation into lightweight, clear-textured products like lotions, gels, and sprays, enhancing user comfort. Mexoryl SX demonstrates high photostability, resisting degradation from prolonged sun exposure, which supports consistent performance in broad-spectrum sunscreen blends alongside UVB filters. Primarily used in sun protection products, it helps shield skin from photoaging factors associated with UVA penetration.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Offers strong absorption of UVA rays to help shield deeper skin layers.
Maintains stability under sunlight for reliable performance throughout the day.
Non-comedogenic, unlikely to clog pores in sunscreen formulations.
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| Individuals seeking enhanced UVA protection in daily sunscreens. | People with known allergies to sulfonic acid derivatives. |
| Users preferring lightweight, water-based sun protection products. | Individuals sensitive to chemical UV absorbers in general. |
| Those with normal to sensitive skin looking for low-irritation filters. | Those preferring mineral-only sunscreen options. |
Safety Notes
- Rated low concern (EWG 1-2) based on available safety data.
- Non-comedogenic with a rating of 0, suitable for acne-prone skin.
Frequently Asked Questions about Mexoryl Sx
What is Mexoryl SX used for in skincare?
It serves as a sunscreen agent, absorbing UVA rays to help protect skin from sun exposure.
Is Mexoryl SX safe for sensitive skin?
It has a low irritation potential and low hazard rating from safety assessments.
Does Mexoryl SX clog pores?
No, it has a comedogenic rating of 0, making it suitable for most skin types.