Avobenzone

Description

Avobenzone · CAS 70356-09-1 · C20H22O3. UNII G63QQF2NOX. Melting Point: 83.5 °C; Vapor Pressure: 0.0000014 [mmHg].

Identification

CAS Registry Number	70356-09-1
PubChem CID	51040
Molecular formula	C20H22O3
IUPAC name	1-(4-tert-butylphenyl)-3-(4-methoxyphenyl)propane-1,3-dione
UNII (FDA)	G63QQF2NOX

Computed Descriptors

Molecular Weight	310.4
XLogP3	4.8
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	6
Exact Mass	310.15689456
Monoisotopic Mass	310.15689456
Topological Polar Surface Area	43.4
Heavy Atom Count	23
Formal Charge	0

Physical & Chemical Properties

Melting Point	83.5 °C
Vapor Pressure	0.0000014 [mmHg]

Physical description & handling notes

• Liquid
• Solid; [Merck Index] Yellow to light tan crystalline powder; [MSDSonline]
• Crystals from methanol
• Off-white to yellowish, crystalline powder
• Slightly aromatic
• Weak odor

Regulatory Status

Regulatory & Food Contact	CIR / INCI: Uv absorber; Uv filter
GHS notification summary	4.7% (97 / 2086)

GHS Hazard Classification

GHS notification summary	4.7% (97 / 2086)
Reported hazard statements	H413 (90.6%)

Documented Uses

• Used as an ultraviolet sunscreen; [Merck Index]
• The Approved Drug Products with Therapeutic Equivalence Evaluations List identifies currently marketed over-the-counter drug products, including avobenzone, approved on the basis of safety and effectiveness by FDA under sections 505 of the Federal Food, Drug, and Cosmetic Act.
• Used as a UVA-filter in sun care products, baby sun care products, daily sun protection, decorative cosmetics; allowed use level in USA is 0.5-4%
• Provides broad-spectrum protection in skin and sun-care preparations; can be used for the formulation of protective hair-care, medicated skin-care and protective skin-tone preparations; Recommended use levels are 2-3% in sunscreen products and 1-2% in everyday skin-care products.
• Cosmetics -> Uv absorber; Uv filter
• Cosmetics product ingredient: Avobenzone

Synonyms

Avobenzone; 70356-09-1; Parsol 1789; Butyl methoxydibenzoylmethane; Escalol 517; Eusolex 9020; Avobenzona; NeoHeliopan 357; Avobenzonum; 4-TERT-BUTYL-4'-METHOXYDIBENZOYLMETHANE; G63QQF2NOX; 1,3-Propanedione, 1-[4-(1,1-dimethylethyl)phenyl]-3-(4-methoxyphenyl)-; NSC-758680; 1-(p-tert-Butylphenyl)-3-(p-methoxyphenyl)-1,3-propanedione; 1,3-Propanedione, 1-(4-(1,1-dimethylethyl)phenyl)-3-(4-methoxyphenyl)-; 1-(4-(1,1-Dimethylethyl)phenyl)-3-(4-methoxyphenyl)-1,3-propanedione

Frequently Asked Questions

What are the CAS number and molecular formula of Avobenzone?

CAS 70356-09-1; molecular formula C20H22O3; molecular weight — g/mol.

What other names is Avobenzone known by?

Avobenzone, 70356-09-1, Parsol 1789, Butyl methoxydibenzoylmethane, Escalol 517, Eusolex 9020.

What is the regulatory status of Avobenzone?

Documented regulatory listings: CIR / INCI: Uv absorber; Uv filter.

Is Avobenzone classified as hazardous?

4.7% of GHS notifications report no hazard classification (97 of 2086).

What are the key physical properties of Avobenzone?

Melting Point: 83.5 °C; Vapor Pressure: 0.0000014 [mmHg].

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.