16633

1-(4-Methoxyphenyl)-3-(4-tert-butylphenyl)-1,3-propanedione

analytical standard

• Synonyme(s) : Avobenzone, Butylmethoxydibenzoylmethane
• Formule empirique (notation de Hill) : C₂₀H₂₂O₃
• Numéro CAS: 70356-09-1
• Poids moléculaire : 310.39
• NACRES: NA.24
• PubChem Substance ID: 329751311
• UNSPSC Code: 41116107
• EC Number: 274-581-6
• MDL number: MFCD00210252
• eCl@ss: 25140904

Propriétés

• grade: analytical standard
• Quality Segment: 100
• assay: ≥99.0% (GC)
• technique(s): HPLC: suitable, chromatography: suitable, gas chromatography (GC): suitable
• mp: 81-84 °C
• application(s): cleaning products; cosmetics; environmental; food and beverages; personal care
• format: neat
• SMILES string: COc1ccc(cc1)C(=O)CC(=O)c2ccc(cc2)C(C)(C)C
• InChI: 1S/C20H22O3/c1-20(2,3)16-9-5-14(6-10-16)18(21)13-19(22)15-7-11-17(23-4)12-8-15/h5-12H,13H2,1-4H3
• InChI key: XNEFYCZVKIDDMS-UHFFFAOYSA-N

Description

General description

Avobenzone is an UVA filter. It is used in sunscreen lotions and cosmetic formulations. It has maximum absorption at ca 340–350 nm, decreasing under UV irradiation resulting in loss of the UVA protecting effect. Its photostability is very sensitive as it is stable in polar protic solvent and is photolabile in nonpolar solvents.

Application

Avobenzone may be used as an analytical reference standard for the quantification of the analyte in the following:

• Sunscreen formulations using reversed-phase high-performance liquid chromatography with diode array detection (RP-HPLC-DAD).
• Freshwater, saline water samples, rat plasma and skin layers using liquid chromatography-positive electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) in multiple reaction monitoring mode (MRM).

Avobenzone may be used to study the photophysical characteristics, photosensitizing activity of a blocked diketo form derived from 4-tert-butyl-4′-methoxydibenzoylmethane (BM-DBM).

Refer to the product′s Certificate of Analysis for more information on a suitable instrument technique. Contact Technical Service for further support.

Informations sur la sécurité

• Codes de danger: H413
• Mentions de précaution: P273 - P501
• Hazard Classifications: Aquatic Chronic 4
• Classe de stockage: 11 - Combustible Solids
• Que se passe-t-il ?: WGK 2
• EPI (équipement de protection individuelle): Eyeshields, Gloves