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PUREsorb 326

PUREsorb 326 is a hydroxyphenyl benzotriazole class UV absorber, which imparts outstanding light stability to polyolefins and polyesters.

Brand: PUREsorb (12 products)

Functions: UV Absorber

Compatible Polymers & Resins: Polyesters, Polyolefins, Polypropylenes (PP)

Processing Methods: Compounding, Injection Molding

End Uses: Indirect Food Contact Applications

Synonyms: 2-(2-Hydroxy-3-tert-butyl-5-methylphenyl)-5-chloro-2H-benzotriazole, 2-(2-Hydroxy-3-tert-butyl-5-methylphenyl)-5-chlorobenzotriazole, 2-(2′-Hydroxy-3′-tert-butyl-5′-methylphenyl)-5-chlorobenzotriazole, 2-(2′-Hydroxy-3′-tert-butyl-5′-methylphenyl)-5-chlorobenztriazole, 2-(3-tert-Butyl-2-hydroxy-5-methylphenyl)-5-chloro-2H-benzo-v-triazole, 2-(3-tert-Butyl-2-hydroxy-5-methylphenyl)-5-chloro-2H-benzotriazole, 2-(3-tert-Butyl-2-hydroxy-5-methylphenyl)-5-chlorobenzotriazole, 2-(3-tert-Butyl-5-methyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3′-tert-Butyl-2′-hydroxy-5′-methylphenyl)-5-chlorobenzotriazole, 2-(3′-tert-Butyl-5′-methyl-2′-hydroxyphenyl)-5-chlorobenzotriazole, 2-(5-Chloro-2-benzotriazolyl)-6-tert-butyl-p-cresol, 2-(5-Chloro-2H-benzotriazol-2-yl)-6-(1,1-dimethylethyl)-4-methylphenol, 2-(5-Chloro-2H-benzotriazol-2-yl)-6-tert-butyl-4-methylphenol, 2-(tert-Butyl)-6-(5-chloro-2H-benzo[d][1,2,3]triazol-2-yl)-4-methylphenol, 2-[5-Chloro-2H-benzotriazol-2-yl]-4-methyl-6-(tert-butyl)phenol, 2-tert-Butyl-6-(5-chloro-2-benzotriazolyl)-4-methylphenol, 2-tert-Butyl-6-(5-chloro-2H-benzotriazol-2-yl)-4-methylphenol, 5-Chloro-2-(2-hydroxy-3-tert-butyl-5-methylphenyl)-2H-benzotriazole, 5-Chloro-2-(3-tert-butyl-2-hydroxy-5-methylphenyl)benzotriazole

Technical Data SheetSafety Data Sheet

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Chemical Name
Bumetrizole
Plastics & Elastomers Functions
UV Absorber
CAS No.
3896-11-5
EC No.
223-445-4
Technologies
Plastics
Product Families
Plastics — Polymer Additives
Antioxidants & Stabilizers
Chemical Structure

PUREsorb 326 - Chemical Structure

Features & Benefits

Materials Features
Excellent Light Stability,
Good Thermal Stability,
Good UV Protection,
Low Volatility
Key Attributes

PUREsorb 326 has a wide range of indirect food approvals in polyolefins. It has a low volatility at high temperatures and high resistance to thermal degradation and can therefore be used without significant loss or decomposition in the polyolefin compounding and molding processes. In the use for the UV protection of polyester resins, PUREsorb 326 does not form colored complexes with the metallic salts used for the curing process of these resins.

Applications & Uses

Compatible Polymers & Resins
Polyesters,
Polyolefins,
Polypropylenes (PP)
Plastics & Elastomers End Uses
Indirect Food Contact Applications
Plastics & Elastomers Processing Methods
Compounding,
Injection Molding
Product Applications

In polyolefins, it is recommended to use PUREsorb 326 with a HALS type light stabilizer system for best results. The recommended concentrations range for PP applications from 0.1 to 0.5%, for PE applications from 0.1% to 0.4%. In polyester resins, the recommended levels range from 0.2% to 0.3%, while for chlorinated, flame retardant polyester resins the recommendation is 0.5%.

Properties

Color
Yellow
Physical Form
Powder,
Solid
Appearance
Slightly yellow powder
Soluble in
Chloroform, Acetone, Methanol, Ethyl Acetate, Methylene Chloride, n-hexane
Physical Properties
ValueUnitsTest Method / Conditions
Melting Range138 - 141°C-
Flash Point238.0°C-
Specific Gravity (at 20°C)1.32g/cm3-
Vapor Pressure (at 20°C)7.5e-07Pa-
Bulk Density130 - 220g/l-
Solubility
ValueUnitsTest Method / Conditions
Acetone (at 20°C)1.0g/100g-
Ethyl Acetate (at 20°C)2.0g/100g-
Methanol (at 20°C)0.1g/100g-
Methylene Chloride (at 20°C)9.0g/100g-
Chloroform (at 20°C)11.0g/100g-
n-Hexane (at 20°C)1.0g/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 326 has to be stored in tightly sealed original container in a cool and well ventilated area, away from direct sunlight.