Octabenzone CAS 1843-05-6 UV-531

Item Name:
UV Absorber UV-531

CAS No.: 1843-05-6

slightly yellow powder

Equal to:
Chimassorb 81


Technical Specs of UV Absorber UV-531 or Octabenzone

Appearance slightly yellow powder
Melting point 47-49℃
boiling point > 300°C
Solubility(20℃) Water < 0.01
MeoH 2
EtoH 2
Acetone 70
Ch2Cl2 67
Hexane 25

Applications of UV Absorber UV-531 or Octabenzone

Features: Low yellowing; Good absorbance in the UV-B region; improves failure of coatings resulting from exposure to sunlight including discoloration, cracking and loss of adhesion.

UV-531 is a UV absorber for plasticized and rigid PVC, polyester, PS, Acrylate resins, vinyl ester based coatings, PU based coatings, alkyed resin coatings, improves the weather resistance of the coating.

Its performance in outdoor applications can be improved further by use in synergistic combination with a hindered amine light stabilizer (HALS) such as HALS 292.

The amount of UV 531 required for optimum performance should be determined in trials covering a concentration range.

Package of UV Absorber UV-531 or Octabenzone

UV Absorber UV-531 is packed 25kg per fiber drum lined with plastic bag, stored in cool and dry place without direct sunlight.