Researched by Helena DeMaria-Williams
Formula IngredientUV FilterButyl Methoxydibenzoylmethane
INCI: Butyl Methoxydibenzoylmethane
Butyl methoxydibenzoylmethane, commonly known as avobenzone, is the only globally approved chemical sunscreen agent that provides broad-spectrum UVA protection across the 310–400 nm range (covering both UVA1 and UVA2), with peak absorbance at 360 nm. It is a dibenzoylmethane derivative that works by absorbing UVA radiation and converting it to heat. However, it is photounstable on its own, losing approximately 36% of its UV-absorption capacity after one hour of sun exposure, so it is typically stabilised with complementary filters such as octocrylene, Tinosorb S, or ensulizole.
Category
UV Filter
Irritation Risk
Low
Skin Types
all skin types, normal, dry, combination, anti-ageing concerns, hyperpigmentation
What does this do in a formula?
broad-spectrum UVA protection, photoageing prevention, reduces UVA-induced skin damage, global standard for UVA filtration
Is Butyl Methoxydibenzoylmethane safe? Key considerations
Can Butyl Methoxydibenzoylmethane cause irritation?
Low RiskAvobenzone is generally considered non-irritating. INCIDecoder confirms a low irritation profile. It shows no estrogenic activity. EU CosIng lists it under Annex VI (entry 8) as a permitted UV filter. Some individuals with sensitive skin may experience mild irritation; patch testing is recommended for reactive skin.
Does Butyl Methoxydibenzoylmethane increase sun sensitivity?
No RiskAvobenzone is itself a UVA-absorbing sunscreen agent and does not increase photosensitivity. However, its photodegradation means sunscreen reapplication every 2 hours is essential for maintained protection.
Is Butyl Methoxydibenzoylmethane safe during pregnancy?
CautionAs a chemical UV filter, avobenzone is absorbed through the skin at low levels. FDA studies (JAMA, 2020) have shown measurable systemic absorption, though clinical significance remains unclear. Many dermatologists recommend mineral sunscreens (zinc oxide, titanium dioxide) as a precaution during pregnancy. Consult a healthcare provider.
How does Butyl Methoxydibenzoylmethane work?
Butyl methoxydibenzoylmethane, commonly known as avobenzone, is the only globally approved chemical sunscreen agent that provides broad-spectrum UVA protection across the 310–400 nm range (covering both UVA1 and UVA2), with peak absorbance at 360 nm. It is a dibenzoylmethane derivative that works by absorbing UVA radiation and converting it to heat. However, it is photounstable on its own, losing approximately 36% of its UV-absorption capacity after one hour of sun exposure, so it is typically stabilised with complementary filters such as octocrylene, Tinosorb S, or ensulizole.
Individuals with known sensitivity to avobenzone or dibenzoylmethane derivatives should review the considerations above before use.
Which products contain Butyl Methoxydibenzoylmethane?
Shop products that contain Butyl Methoxydibenzoylmethane
