Powersorb™ 328 Cas No. 25973-55-1

2-(2’-Hydroxy-3’,5’-di-t-amylphenyl)benzotriazole;

2 2h benzotriazol 2 yl 4 6 ditertpentylphenol uv 328

PowerSorb™ 328 is a strong absorber of ultraviolet radiation and has a high degree of photostability - photochemical energy absorbed in the ultraviolet region is dissipated as thermal energy.

Technical Data of PowerSorb™ 328 CAS No. 25973 55 1

Synonyms

Tinuvin 328, Uvinul 3028, Omnistab 328, Songsorb 3280, Cyasorb UV-2337, Lowilite 28, HOSTAVIN 3310P, Eversorb 74, Chiguard 328, EVERSTAB 328.

CAS Number

25973-55-1

EINECS Number

247-384-8

Chemical Structure

Chemical Formula

C22H29N3O

Molecular Weight

352

Packing

PowerSorb™ 328 is supplied in 25Kg Carton Box or 40Kg Fiber Drum.

Note

All information in the leaflet is based on our present knowledge and experience. We reserve the right to make any changes according to technological progress or further developments. Performance of the product described herein should be verified by testing.

We specifically disclaim any other express or implied warranty of fitness for a particular purpose or merchantability.

We disclaim liability for any incidental or consequential damages.

Benefits & Applications of PowerSorb™ 328 cas no 25973 55 1

PowerSorb™ 328 features strong UV absorption, low initial color, good solubility in plasticizers and monomers, moderately low volatility, and excellent compatibility in a wide variety of substrates.

PowerSorb™ 328 can be used in combination with phenolic & phosphite antioxidants, and HALS to optimize performance in outdoor use.

PowerSorb™ 328 is suitable for use in polyolefins, PVC, styrene homo and copolymers, ABS, acrylic polymers, unsaturated polyesters, thermoplastic urethanes, moisture cured polyurethanes, polyacetals, polyvinylbutyral, two component epoxies and urethanes, oil alkyds and thermosetting acrylic enamels.

Physical Properties of PowerSorb™ 328 25973 55 1 cas

Appearance

Pale yellow powder

Specific Gravity [20°C]

1.17

Melting Point (°C)

79-83

Boiling Point (°C)

477.8

Flash Point (°C)

229

Vapour Pressure (25°C, Pa)

4.3E-9

Volatile Loss (%)

Max.0.5

Color of Solution 460nm (%)

Min.97

Color of Solution 500nm (%)

Min.98

Ash (%)

Max.0.1

Purity (%)

Min.99

Solubility of PowerSorb™ 328 CAS No. 25973-55-1

Solubility [20°C]

% w/w

Acetone

6

Benzene

39

Butyl Carbitol

3.5

Butanol

2.5

Butyl acetate

15

Chloroform

44

Cyclohexane

56

Dichloromethane

56

Ethanol

0.6

Ethyl acetate

20

Ethyl glycol

4

n-Hexane

16

MEK

14

Methanol

0.4

Methyl ethyl ketone

24

Mineral spirits

14

Styrene

34

Water

<0.01

Xylene

34

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