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https://www.uvabsorber.com/products/benzotriazole-uv-absorber/ Benzotriazole UV absorbers are excellent cost-effective UV absorbers that have balanced UV absorption bands from short wavelengths to long wavelengths. Benzotriazole UV absorbers have exceptional UV absorption from 300 to 380 nm and are commonly used to enhance the durability of various engineering plastics and polyolefins.