Butyl Methoxydibenzoylmethane

Butyl Methoxydibenzoylmethane, commonly known as Avobenzone, is an organic chemical UV filter that primarily provides protection against UVA rays. It is one of the few organic filters that effectively covers the entire UVA spectrum. However, it is known to be photounstable, meaning it can degrade when exposed to sunlight, which is why it is often formulated with other photostabilizing ingredients.

BenefitStrong 3.5 / 4

Uv protection i3.5 / 4

Whether it provides direct protection against UV radiation.

RiskModerate 1.5 / 4

Irritation i0.8 / 4

Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.

Sensitization i0.7 / 4

Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.

Systemic exposure i0.5 / 4

Whether it has meaningful potential to be absorbed into the body at levels that may matter biologically. Most cosmetic ingredients score low unless there is known concern or high exposure.

Eye irritation i0.2 / 4

Whether it may sting or irritate around the eyes. Relevant for sunscreens, fragrances, acids, surfactants, and volatile ingredients.

Rated by SpottyLabs' ingredient methodology, independent of brands.

What it helps with

• effective UVA protection
• broad UVA spectrum coverage

Things to watch

• photounstable, requires stabilizers
• potential for skin irritation or sensitization

Pairs well with

• Sunscreen Filter — It is often combined with photostabilizers like Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine to prevent its degradation in sunlight and maintain its UVA protection.

Products with Butyl Methoxydibenzoylmethane

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Frequently asked questions

What type of UV rays does Avobenzone protect against?

Avobenzone is primarily effective against UVA rays, which are responsible for skin aging and long-term skin damage. It covers the full UVA spectrum, making it a crucial component in broad-spectrum sunscreens.

Why is Avobenzone often combined with other ingredients in sunscreens?

Avobenzone is photounstable and can degrade when exposed to sunlight, reducing its effectiveness. It is typically formulated with photostabilizers to ensure its protective capabilities remain intact throughout sun exposure.