Eversorb® 71 is a strong absorber of UV radiation, providing excellent photostability to polymers against UV light exposure. It helps retard color yellowing, prevent embrittlement, and maintain mechanical properties. Eversorb® 71 is particularly effective in styrenic polymers, PVC, unsaturated polyesters, polyurethane, acrylic polymers, and adhesives.

Chemical Family: Benzotriazoles

Compatible Polymers & Resins: Acrylics, Polyesters, Polyurethanes (PU), Polyvinyl Chloride (PVC)

Features: Excellent Compatibility, Good Mechanical Properties, Heat Resistance, High Photostability, Prevents Embrittlement

End Uses: Acrylic Adhesives

Synonyms: 2-(2-Hydroxy-5-methyl)benzotriazole, 2-(2-Hydroxy-5-methylphenyl)-2H-benzotriazole, 2-(2-Hydroxy-5-methylphenyl)benzotriazole, 2-(2′-Hydroxy-5′-methylphenyl)benzotriazole, 2-(2H-Benzo[d][1,2,3]triazol-2-yl)-4-methylphenol, 2-(2H-Benzotriazol-2-yl)-4-methylphenol, 2-(5-Methyl-2-hydroxyphenyl)benzotriazole, 2-(5′-Methyl-2′-hydroxyphenyl)benzotriazole, 2-Benzotriazol-2-yl-4-methylphenol, 4-Methyl-2-(2H-benzotriazol-2-yl)phenol, UV Absorber 1

Enhanced TDS

Identification & Functionality

Chemical Family
Chemical Name
Manufactured By
CASE Ingredients Functions
Plastics & Elastomers Functions
Technologies
Product Families
Chemical Structure

Eversorb® 71 - Chemical Structure - 1

Features & Benefits

Applications & Uses

Compatible Polymers & Resins
Adhesive & Sealant End Applications
Advantages
  • Very high photostability for its strong ability to absorb light in UV region.
  • Very good compatibility with polymers.
  • Very high heat resistance, without significant degradation or volatility at proper extrusion temperature.
  • Odorless, does not bring smells to the polymers.

Properties

Physical Form
Appearance
Slightly yellowish crystalline powder
Typical Properties
ValueUnitsTest Method / Conditions
Melting Point128.0 - 132.0°C-
Molecular Weight225g/mol-
SDS Physical and Chemical Properties
ValueUnitsTest Method / Conditions
Vapor Pressure (at 20°C)1.0*10-⁵Pa-
Specific Gravity1.38--
Ignition Temperature520°C-
Flash Point205°C-
Melting Point128 - 132°C-
OdorNone--
ColorSlightly Yellow--
Physical FormCrystal powder--
Insoluble inWater--
Solubility Data
ValueUnitsTest Method / Conditions
Methanol Solubility (at 25°C)0.3g/100g solvent-
n-Hexane Solubility (at 25°C)0.7g/100g solvent-
Ethyl Acetate Solubility (at 25°C)3g/100g solvent-
Benzoic Acid Solubility (at 25°C)8g/100g solvent-
Chloroform Solubility (at 25°C)14g/100g solvent-
Water Solubility (at 25°C)max. 0.01g/100g solvent-

Regulatory & Compliance

Chemical Inventories

Technical Details & Test Data

Techical Information
  • UV-Vis Spectrum

Eversorb® 71 - Technical Information - 1

  • TGA scans

Eversorb® 71 - Technical Information - 1

Storage & Handling

Storage and Handling Information
  • Personal equipment for protection is recommended.
  • Excess exposure to the product should be avoided.
  • Wash thoroughly after handling.
  • EVERSORB 71 should be kept in a dry, dark place without any light exposure.