The Universal Selection Source:
Adhesives Ingredients


Technical DataSheet | Supplied by M Chemical

2-(2’-Hydroxy-3,5’-di-t-amylphenyl)benzotriazole. Acts as a UV light stabilizer. It has exceptionally strong and broad-range of UV absorption properties in 270 - 380 nm region with low color contribution. Provides excellent protection to plastics. It has high degree of inherent light stability and low volatility. It helps to preserve the original appearance and physical integrity of polymer systems during outdoor weathering. This product may also be used in conjunction with other light stabilizers of HALS class to give plastics a superior protection against gloss reduction, cracking, color change, blistering, chalking and delamination. It is only recommended for room temperature and low temperature cured formulations such as air dried alkyd or moisture cured PU based systems. Exhibits excellent compatibility with styrene, acrylic, PVC, PU, polyolefins, unsaturated polyesters, PVB, polyacetals, elastomers and engineering polymers. Recommended dosage rate for plastics is less than 1%.

GUARD DOG™ UV328 Product details

Product Type
Chemical Composition
CAS Number
Physical Form
Pale yellow
Product Status
Applications/ Recommended for
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GUARD DOG™ UV328 Properties


Value & Unit
Test Condition
Test Method
Melting point
xxxxxxx °C
Flash point, DIN 51584
xxxxx °C
Ignition, BAM
xxx °C
Molecular weight
xxxxx g/mol
Solubility in methyl ethyl ketone at 20°C
xx g/100g
Solubility in butanol at 20°C
xxx g/100g
Solubility in ethylene glycol at 20°C
x g/100g
Solubility in butyl acetate at 20°C
xx g/100g
Solubility in xylene at 20°C
xx g/100g
Solubility in mineral spirit at 20°C
xx g/100g
Solubility in ethyl acetate at 20°C
xx g/100g
Solubility in water at 20°C
xxxxxx g/100g
xxxxx %
Transmittance @ 460 nm
xxxx %
Transmittance @ 500 nm
xxxx %
Assay, HPLC
xxxx %

Solubility Properties

Test Condition
Test Method
Insoluble in
Soluble in
Last edited Jun 8, 2016
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