Butyl Methoxydibenzoylmethane
⚠ EU RestrictedIdentification
CAS Number 70356-09-1
EINECS / EC 274-581-6
CosIng Ref 31713
Chemical Name 1-(4-tert-butylphenyl)-3-(4-methoxyphenyl)propane-1,3-dione
IUPAC Name —
Formula C20H22O3
Mol. Weight 310.4 g/mol
InChIKey XNEFYCZVKIDDMS-UHFFFAOYSA-N
Function & Classification
Primary Function UV Filter
Secondary Functions UV ABSORBER; UV FILTER
Category UV Filters
Manufacturer AAK (AAKO B.V.)
EU Regulatory Status
Max Leave-on 5%
Max Rinse-off 5%
Restrictions Max 5%
Conditions of Use Max 5% in sunscreen products.
Safety Profile
4 / 10
Comedogenic Rating: 1/5
Low risk — should be fine for most skin types
Skin Type Compatibility
Acne-Prone ✓ Safe
Sensitive Skin ✕ Potential Irritant
Fungal Acne Safe ✓ Safe
Toxicology Profile
NOAEL 500 mg/kg bw/day (oral, rat, 90-day) COLIPA/SCCS review 2006
Sensitization Moderate
Genotoxicity Non-genotoxic
Phototoxicity Non-phototoxic
Dermal Absorption 0.3%
LD₅₀ Oral >2000 mg/kg (rat)
LD₅₀ Dermal >2000 mg/kg (rat)
Skin Irritation (Draize) 0.3 / 4.0
Eye Irritation (Draize) 0.8 / 4.0
Formulation Guidelines
Solubility Insoluble.
Benefits UVA protection; avobenzone
Suppliers & Documents
AAK (AAKO B.V.) 🇳🇱 Netherlands
Safic Alkan 🇹🇷 Turkey
Documents