UV-531(Benzophenone UV Absorber )
Chemical name : 2-Hydroxy-4-n-octoxybenzophenone
Introduction : UV- 531 is an ultraviolet light absorber (UVA) of the benzophenone class, imparting good light stability for plastics and other organic polymers. Due to its highly effective broad UV absorption properties and excellent polymer compatibility, UV- 531 offers maximum polymer protection and low color contribution, retards yellowing and loss of physical properties.
CAS NO : 1843-05-6
Empirical Formula : C₂₁H₂₆O_{3
Appearance:}

Physical Properties
Molecular Weight : 326
Appearance : pale yellow needle crystal powder
Melting Range : 47-49 °C
Assay : 99% Min.
Volatile Matter : < 0.5% Max.
Specific Gravity(20 °C) : 1.16g/cm³
Solubility At 20 ºC (g/100ml solvent)Applications
1.Polypropylene : 0.2-0.5wt% based on polymer weight
2.PVC:
    Rigid PVC : 0.5wt% based on polymer weight
    Plasticized PVC : 0.5-2 wt% based on polymer weight
3.Polyethylene : 0.2-0.5wt% based on polymer weight

Toxicity & Safety
This material is not intended for use in products for which prolonged contact with mucous membranes or abraded skin, or implantation within the human body is specially intended, unless the finished product has been tested in accordance with the Food and Drug Administration and/or other applicable safety testing requirements.

Storage
The product may be stored up to two years in a sealed container. Containers should be stored in a cool, dry area. Extended storage at elevated temperatures or exposure to direct heat or sunlight could reduce product life. Keep containers sealed when no in use.

Handling
In accordance with good industrial practice, handle with care and avoid unnecessary personal contact. Protect skin. Prevent contamination of the environment. Avoid dust formation and ignition sources.

Packing
Carton is lined with a plastic bag packaging: 20 or 25kg/ box. Also can be designed according to customer requirements.