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C4-5 CYANOACETATE/DI-C4-5 MALONATE ANTHRACENEDIYLIDENE/FLUORENYLIDENE/THIOXANTHENEYLIDENE.

Valuable / LIGHT STABILIZER, SKIN CONDITIONING

A sophisticated, broad-spectrum photostabilizer and antioxidant that prevents skin damage by neutralizing energy before free radicals can form. It serves as a critical bridge in precision skincare, protecting both the formula's integrity and the skin's cellular structures from visible light and UVA-induced stress.

Photostabilizer Triplet-state quencher Antioxidant Light stabilizer

Science

Operates as a high-efficiency triplet-state quencher and singlet oxygen inhibitor. It intercepts energy from UV-excited molecules and endogenous chromophores like Protoporphyrin IX, safely converting that energy into negligible heat before it can react with oxygen to generate damaging Reactive Oxygen Species (ROS).


Research

High confidence
Effective range 0.5–2%
Optimal

1%

Key findings

  1. 01 Clinical testing at 0.5% concentration demonstrated a 25% reduction in visible light-induced free radicals and a significant decrease in inflammatory markers IL-6 and IL-1α.
  2. 02 Research at 1.0% concentration confirmed the maintenance of over 90% UVA absorbance in Avobenzone-based formulas after exposure to 10 MED of radiation.

Transparency

Commonly dusted
Min. effective
0.5%
Red flag below
0.1%

Due to its advanced technical profile, it is often included at negligible levels for marketing claims. While bio-activity begins at 0.5%, a concentration of 1.0% is required for robust photostabilization of sunscreens.


The Formula

Solubility
Oil
Optimal pH 4 – 8
0 7 14

Stability

An exceptionally stable liquid ester; resistant to photodegradation and maintains performance across standard cosmetic pH ranges.

Synergies

  • Avobenzone
  • Retinol
  • Protoporphyrin IX
  • Vitamin E

Conflicts

  • Anhydrous aqueous systems
  • Strong oxidizing agents

Safety

CIR Status
Not reviewed
Max tested
2%
Pregnancy
Safe
Sensitization risk Low

Classified as a functional light stabilizer rather than an active UV filter; currently listed in the EU CosIng database without specific restrictive caps up to recommended use levels.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

An elite additive for modern sun care that offers preventative antioxidant protection far superior to traditional post-exposure quenchers.


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