Quick answer
An ester that functions as an antioxidant and photostabilizer; Stabilizes UV filters, especially avobenzone; Can increase critical wavelength (amount of UVA protection) in sunscreen formulas; Helps boost SPF of sunscreen formulas Key benefits: Anti-Aging.
Diethylhexyl Syringylidenemalonate
Updated
Propanedioic Acid, [(4-Hydroxy-3,5-Dimethoxyphenyl)Methylene]-, Bis(2-Ethylhexyl) Ester
Purpose
This ester functions as an antioxidant and photostabilizer in skin care, meaning it can protect against deterioration caused by light. It also stabilizes UV filters, most notably avobenzone.
Rating
GOOD
Category
Antioxidant
INCI Purpose
SKIN PROTECTING
Benefits
Alternative Names
At a Glance
An ester that functions as an antioxidant and photostabilizer
Stabilizes UV filters, especially avobenzone
Can increase critical wavelength (amount of UVA protection) in sunscreen formulas
Helps boost SPF of sunscreen formulas
Article
Diethylhexyl syringylidenemalonate (DESM) is an ester that functions as an antioxidant and helps protect cosmetics from chemical or physical deterioration induced by light. This means it is a photostabilizer.
In this function, it also stabilizes many UV filters, most notably avobenzone. Research shows diethylhexyl syringylidenemalonate can increase critical wavelength in sunscreens (a measure of protection against UVA rays) and boost SPF in sunscreen formulas. At room temperature it is a viscous yellowish liquid or a low-melting solid.
Maximum usage levels for this antioxidant haven’t been established; however, amounts between 0.3–0.5% produce the desired photostabilizing effects in sunscreens.
References