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PUREsorb 531

PUREsorb 531 is an ultraviolet light absorber (UVA) of the benzophenone class, imparting good light stability when used in combination with a hindered amine light.

Brand: PUREsorb (12 products)

Functions: Light Stabilizer, Stabilizer, UV Absorber

Compatible Polymers & Resins: Ethylene Vinyl Acetate (EVA), Linear Low Density Polyethylene (LLDPE) , Low-Density Polyethylene (LDPE), Polyolefins, Polyvinyl Chloride (PVC)

End Uses: Agricultural Applications, Crates, Film

Synonyms: (2-Hydroxy-4-octoxyphenyl)-phenylmethanone, [2-Hydroxy-4-(octyloxy)phenyl]phenylmethanone, 2-Benzoyl-5-octyloxyphenol, 2-Hydroxy-4-(n-octyloxy)benzophenone, 2-Hydroxy-4-(octyloxy)benzophenone, 2-Hydroxy-4-octoxybenzophenone, 4-(Octyloxy)-2-hydroxybenzophenone, 4-n-Octyloxy-2-hydroxybenzophenone, NSC 163400, Octabenzone

Technical Data SheetSafety Data Sheet

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Chemical Name
2-Hydroxy-4-n-octoxybenzophenone
Plastics & Elastomers Functions
Light Stabilizer,
Stabilizer,
UV Absorber
CAS No.
1843-05-6
EC No.
217-421-2
Technologies
Plastics
Product Families
Plastics — Polymer Additives
Antioxidants & Stabilizers
Chemical Structure

PUREsorb 531 - Chemical Structure

Features & Benefits

Materials Features
Excellent Compatibility,
Good Light Stability,
Good UV Resistance,
Low Blooming,
Low Migration
Key Attributes

PUREsorb 531 is particularly suitable for thick films, typically > 100 μm and thick sections. The low vapor pressure of PUREsorb 531 prevents losses during processing. Low migration rates reduce the risk of blooming..

Applications & Uses

Markets
Printing & Packaging
Applications
Printing & Packaging — Packaging
Industrial & Transport Packaging
Compatible Polymers & Resins
Ethylene Vinyl Acetate (EVA),
Linear Low Density Polyethylene (LLDPE) ,
Low-Density Polyethylene (LDPE),
Polyolefins,
Polyvinyl Chloride (PVC)
Plastics & Elastomers End Uses
Agricultural Applications,
Crates,
Film
Product Applications

The main application of PUREsorb 531 is in combination with a HALS for the light stabilization of LDPE, LLDPE as well as EVA copolymers for agricultural films. It can also be used as a UV barrier to protect the contents of packages for both industrial and consumer applications. It is also suitable for HDPE molded articles, e. g. in crates, and plasticized PVC and rubbers.

It can be used in combination with antioxidants, phosphites and other light stabilizers. For the use of PUREsorb 531 in thick sections, a proper UV stabilization can be achieved in PE with concentration of 0.10 – 0.5%. With films, the UV stabilizations of LLDPE, LDPE and EVA require 0.15 – 0.5%.

Properties

Color
Yellow
Physical Form
Powder,
Solid
Appearance
Pale cream to light yellow powder
Physical Properties
ValueUnitsTest Method / Conditions
Melting Range47 - 49°C-
Specific Gravity (at 20°C)1.16g/cm3-
Vapor Pressure (at 20°C)4.6e-07Pa-
Bulk Density (Powder)360 - 440g/l-
Bulk Density (Pellets)440 - 540g/l-
Solubility
ValueUnitsTest Method / Conditions
Acetone (at 20°C)43.0g/100g-
Ethyl Acetate (at 20°C)44.0g/100g-
Methanol (at 20°C)1.7g/100g-
Dichloromethane (at 20°C)67.0g/100g-
Water (at 20°C)max. 0.01g/100g-
Chloroform (at 20°C)61.0g/100g-
Ethanol (at 20°C)3.5g/100g-
n-Hexane (at 20°C)12.0g/100g-
Toluene (at 20°C)min. 50g/100g-

Safety & Health

Product Safety

In accordance with good industrial practice, handle with care and avoid unnecessary personal contact. Avoid continuous or repetitive breathing of dust. Use only with adequate ventilation. Prevent contamination of the environment. Avoid dust formation and ignition sources.

Storage & Handling

Product Storage

PUREsorb 531 has to be stored in tightly sealed original container in a cool and well-ventilated area, away from direct sunlight.