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Ingredient · INCI reference

Benzophenone-4

Sulisobenzone (Benzophenone-4) is a water-soluble organic sunscreen filter that absorbs UVB and some UVA.

Sulisobenzone CAS 4065-45-6

What it is

Sulisobenzone is a water-soluble benzophenone filter that absorbs across UVB and into UVA-II. Its water solubility makes it useful in lighter formulas, and it is also used to help protect other ingredients from light. It is combined with additional filters for full coverage.

Spectrum coverage

UVA2 · UVB

UVA-I 340–400nm UVA-I (340–400nm) — not covered UVA-II 320–340nm UVA-II (320–340nm) — covered UVB 290–320nm UVB (290–320nm) — covered

Regional approval · max %

JP ✓ 10% Japan: Approved · Max 10% KR ✓ 5% South Korea: Approved · Max 5% EU ✓ 5% Europe: Approved · Max 5% US ✓ 10% United States: Approved · Max 10%

Safety & warnings

Used within regulated limits; as a benzophenone some consumers prefer benzophenone-free formulas by choice.

Reef-toxic
No
Endocrine disruptor
No
Comedogenicity
0

Origin & sourcing

Synthetic organic UV filter.

Questions everyone asks

Is sulisobenzone oily?

No, it is water-soluble and suits lighter, water-based sunscreens.

What does it cover?

UVB and some shorter UVA, alongside other filters for broad-spectrum protection.

Sources & references

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