Avobenzone, chemically known as Butyl Methoxydibenzoylmethane, is an oil-soluble organic UVA filter widely used in sunscreens. It provides long-wave UVA protection (320–400 nm), which is essential for preventing photoaging, pigmentation, and deep skin damage caused by UVA exposure. As one of the few filters that efficiently absorb UVA rays, Avobenzone is a critical component in modern broad-spectrum sunscreens.
Name: Avobenzone (Butyl Methoxydibenzoylmethane)
Chemical Formula: C20H22O3
CAS Number: 70356-09-1
Appearance: Yellow crystalline powder
Solubility: Oil-soluble, suitable for emulsified formulations
☀️ Highly effective UVA filter (protects from long-wave UVA)
Prevents photoaging, pigmentation, and collagen breakdown
Compatible with UVB filters for broad-spectrum SPF formulas
Lightweight and cosmetic-friendly for daily skincare use
Essential in both high-SPF and anti-aging sunscreen products
Industry | Function | Examples |
---|---|---|
Sunscreen & Skincare | UVA protection | Broad-spectrum sunscreens, day creams |
Cosmetics | Anti-aging and daily SPF formulas | Tinted moisturizers, foundations |
Personal Care | Long-term UVA defense | Anti-pigmentation and repair creams |
Mode of Action
Avobenzone works by absorbing UVA rays and converting them into less harmful energy (heat), preventing deep skin penetration that leads to aging and DNA damage. It is usually combined with stabilizers like Octocrylene to maintain its activity under sun exposure.
Provides broad-spectrum UVA coverage
Reduces risks of photoaging and skin sagging
Combines well with UVB filters like Octinoxate or Zinc Oxide
Safe and effective for daily, long-term sun protection
Photounstable: breaks down under sunlight without stabilizers
Does not protect against UVB (requires additional UVB filters)
May cause mild irritation in very sensitive skin types
Q: Why is Avobenzone important if I already use UVB sunscreen?
A: UVB filters prevent sunburn, but UVA rays penetrate deeper and cause aging and pigmentation. Avobenzone covers UVA, completing broad-spectrum protection.
Q: How is Avobenzone stabilized in sunscreens?
A: It is often combined with Octocrylene or Tinosorb S/M to prevent photodegradation under sun exposure.
Q: Is Avobenzone safe for daily use?
A: Yes, it is approved globally and safe when used within regulated concentrations (commonly up to 3%).
Avobenzone is a vital UVA filter in sunscreen formulations, offering protection against deep sun damage and premature aging. Combined with UVB filters, it forms the cornerstone of broad-spectrum sun care essential for maintaining healthy, youthful skin.