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Octabenzone

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(Redirected from UV 531)
Octabenzone
Names
Preferred IUPAC name
[2-Hydroxy-4-(octyloxy)phenyl](phenyl)methanone
Other names
Benzophenone-12, Spectra-Sorb UV 531, MPI Milestab 81
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.015.838 Edit this at Wikidata
KEGG
MeSH (2-hydroxy-4-(octyloxy)phenyl)phenylmethanone
UNII
  • InChI=1S/C21H26O3/c1-2-3-4-5-6-10-15-24-18-13-14-19(20(22)16-18)21(23)17-11-8-7-9-12-17/h7-9,11-14,16,22H,2-6,10,15H2,1H3 checkY
    Key: QUAMTGJKVDWJEQ-UHFFFAOYSA-N checkY
  • InChI=1/C21H26O3/c1-2-3-4-5-6-10-15-24-18-13-14-19(20(22)16-18)21(23)17-11-8-7-9-12-17/h7-9,11-14,16,22H,2-6,10,15H2,1H3
    Key: QUAMTGJKVDWJEQ-UHFFFAOYAM
  • O=C(c1ccc(OCCCCCCCC)cc1O)c2ccccc2
Properties
C21H26O3
Molar mass 326.429 g/mol
Appearance Light Yellow to Colourless Solid
Melting point 47–49 °C (117–120 °F; 320–322 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Octabenzone (Spectra-Sorb UV 531, MPI Milestab 81) is a UV absorber/screener. It is used to protect polymers (e.g., polyethylene, polypropylene, polyvinylchloride) against damage by UV light.