Phenylbenzimidazole Tetrasulfonate
Phenylbenzimidazole Tetrasulfonate is a broad-spectrum organic UV filter that provides protection against both UVA and UVB radiation. It is a highly photostable ingredient, meaning it doesn't degrade quickly when exposed to sunlight, offering long-lasting sun protection. This ingredient is often used in sunscreens and anti-aging products.
Sunscreen filterUV filterVeganEvidence: High
BenefitStrong 3.8 / 4
Uv protection i3.8 / 4
Whether it provides direct protection against UV radiation.
RiskLow 1 / 4
Sensitization i0.5 / 4
Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.
Irritation i0.5 / 4
Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.
Rated by SpottyLabs' ingredient methodology, independent of brands.
What it helps with
- provides broad-spectrum UV protection
- highly photostable
- helps prevent premature skin aging
Things to watch
- potential for skin irritation
- possible allergic reactions
See how this matches your skin
Find out exactly what you put onto your skin. Scan any product before you buy. Free and independent — no brand is paying us. Available on both on Android and Apple
Frequently asked questions
- What is broad-spectrum protection?
- Broad-spectrum protection means the sunscreen ingredient protects against both UVA rays (which contribute to aging and skin cancer) and UVB rays (which cause sunburn).
- Is Phenylbenzimidazole Tetrasulfonate considered photostable?
- Yes, Phenylbenzimidazole Tetrasulfonate is known for its high photostability, meaning it maintains its effectiveness for longer periods when exposed to sunlight compared to some other UV filters.
