Avobenzone
CAS Number
70356-09-1
EC Number
274-581-6
What is Avobenzone?
Avobenzone (CAS 70356-09-1), also marketed as Parsol 1789 and Escalol 517, is a UVA-absorbing active.
Where is Avobenzone used?
- Suncare and daily-wear cosmetics: primary UVA active, often combined with UVB filters for broad-spectrum compliance under FDA OTC monograph or EU cosmetic regulations
- Coatings and polymers: protects plastics, adhesives and sealants from UVA-induced degradation and discoloration during outdoor exposure
- Personal care: moisturizers, lip products and foundations where incidental UVA protection is a formulation requirement
- Stabilizer packages pair it with photostabilizers such as Tinosorb S or octocrylene to counter photodegradation.
Good to know: Provides broad-spectrum UVA coverage in the 320–400 nm range. Cosmetic grades meet USP and Ph. Eur. specifications; technical grade serves industrial coating and polymer applications.
Commercial specifications
- Minimum purity typically 97% or higher
Other Names (Synonyms)
Parsol 1789|Butyl Methoxydibenzoylmethane|Escalol 517|Eusolex 9020|NeoHeliopan 357|4-TERT-BUTYL-4'-METHOXYDIBENZOYLMETHANE|1,3-Propanedione, 1-[4-(1,1-dimethylethyl)phenyl]-3-(4-methoxyphenyl)-|1-[4-(1,1-Dimethylethyl)phenyl]-3-(4-methoxyphenyl)-1,3-propanedione
What are the physical properties of Avobenzone?
Melting Point 83.5 °C
Boiling Point 463.6±35.0 °C(Predicted)
Density 1.079
Color White to Pale Yellow
Form neat
Water Solubility 27μg/L at 20℃
Vapor Pressure 0Pa at 25℃
Log P 6.1 at 20℃
Which trade and regulatory codes apply to Avobenzone?
HS Code 29145000
UN Number 3077
ADR Class 9
Packing Group III
Storage Class 11 - Combustible Solids
WGK (Germany) 2