Benzophenone-4
AKA “Sulisobenzone, 5-Benzoyl-4-hydroxy-2-methoxybenzenesulfonic acid, 2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid, Sungard, Uval, Benzophenone 4, Seesorb 101S, Syntase 230
Synthetic
Ingredient Facts
Benzophenone-4
AKA: Sulisobenzone, 5-Benzoyl-4-hydroxy-2-methoxybenzenesulfonic acid, 2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid, Sungard, Uval, Benzophenone 4, Seesorb 101S, Syntase 230
Synthetic · Uv Absorber · EWG: 1
Synthetic
Sunscreen Filter
Synthetic
Clean
Helps protect your product from breaking down in sunlight while also absorbing UV rays to shield skin from sun damage.
Solubility 10
Formula
C14H12O6S
Mol. Weight
308.31
CAS #
4065-45-6
Form
Powder
State
Dry Powder
See origin →
Functions
Light Stabilizer
Uv Absorber
Blocks or absorbs UV rays to protect your skin from sun damage, dark spots, and premature aging.
Uv Filter
Blocks or absorbs UV rays to protect your skin from sun damage, dark spots, and premature aging.
Shields from UV damage
Traditional Use
A synthetic water-soluble UV filter developed in the 20th century for use in aqueous cosmetic formulations and sunscreens. Engineered to provide UV protection in products where oil-soluble UV absorbers were not suitable.
Skin Types
all-skin-types
Best For
Sun Damage
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Caution
EWG
1
CIR
Safe w/Qualifications
Pregnancy
Caution
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Concentration Guide
10.0%
0%14%
Reg. Limit
FDA OTC limit (Sunscreen): 10%. 21 CFR 352.10 | EU/SCCS limit: 5% in rinse-off. Opinion: SCCS/1660/23
Regulatory Status
USApermitted
EUpermitted
JAPANpermitted
CANADApermitted
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR