Diethylhexyl Syringylidenemalonate
dye-ETH-ul-HEX-ul sir-IN-jil-ih-deen-MAL-oh-nate
What Is Diethylhexyl Syringylidenemalonate?
A synthetic UV filter and antioxidant that protects hair from UV damage and photoaging. It enhances the efficacy of other UV filters when used in combination.
Source: Synthetic organic compound
Origin: Synthetic
Also known as: SynergyLift, DEHSM
What Does Diethylhexyl Syringylidenemalonate Do to Your Hair?
Provides broad-spectrum UV protection by absorbing UV radiation and boosting the efficacy of other UV filters. Potent antioxidant that protects hair proteins and color from photodegradation. Stabilizes other UV-sensitive ingredients.
Best For
Color-treated hair, sun-exposed hair, damaged hair
Not Recommended For
None known
Concentration Matters
0.5-2% in products
Hair Type Compatibility
Method Compatibility
Safety & Regulation
Safe for cosmetic use. Relatively new ingredient with limited but positive safety data. Functions primarily as a UV booster rather than a standalone filter. Non-irritating at standard concentrations.
FDA Status: Generally Recognized As Safe
FDA permits use in cosmetics. Not classified as a standalone sunscreen active.
EWG Score: 2/10
HairAide Verdict
A useful UV-boosting antioxidant for protecting hair color from sun damage. Works best in combination with other UV filters. Worth seeking in color-protection products if you spend time in the sun.
Products That Contain Diethylhexyl Syringylidenemalonate
UV-protect hair products, color-protect treatments, leave-in conditioners
Alternatives to Diethylhexyl Syringylidenemalonate
If you want to avoid Diethylhexyl Syringylidenemalonate, look for products with these ingredients instead:
Polysilicone-15, Benzophenone-4
Frequently Asked Questions
Yes, Diethylhexyl Syringylidenemalonate has a safety rating of 7/10 and is generally considered safe for use in hair products. Safe for cosmetic use. Relatively new ingredient with limited but positive safety data. Functions primarily as a UV booster rather than a standalone filter. Non-irritating at standard concentrations.
Diethylhexyl Syringylidenemalonate is not CG-method approved. Curly hair types may want to avoid this ingredient or use products containing it sparingly.
No, Diethylhexyl Syringylidenemalonate is not approved for the Curly Girl method.
Some alternatives to Diethylhexyl Syringylidenemalonate include: Polysilicone-15, Benzophenone-4
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