--- description: Explore Tinuvin 328, a highly efficient UV absorber. Gain insights into its properties, applications, and understand its role in enhancing polymer longevity. title: Tinuvin 328 image: https://welltchemicals.com/wp-content/uploads/2024/01/1-72.png --- [Skip to content](#content) # Tinuvin 328 ## Sourcing Tinuvin 328 & UV 328 from China - Professional Quality Assured! As a trusted and professional supplier, we ensure top-notch quality and seamless delivery of these essential chemicals for your business needs. Our extensive network and technical expertise guarantee that you receive the finest products at competitive prices. Please don’t settle for less when it comes to your sourcing requirements. Contact Wellt today and experience the difference in quality and service. [Home](https://welltchemicals.com/) » [Light Stabilizers](https://welltchemicals.com/light-stabilizers/) » [UV Absorbers](https://welltchemicals.com/light-stabilizers/uv-absorbers/) » Tinuvin 328 - ![SVG](https://welltchemicals.com/wp-content/uploads/2024/01/2-1.webp) ## Introducing Tinuvin 328 from Wellt Our product brand: Wellsorb UV 328 - **Tinuvin 328** is a UV absorber produced by Wellt to protect products and surfaces from harmful UV rays. - Also known as 2-(2’-Hydroxy-3’,5’-Di-tert-Amylphenyl) Benzotriazole, it has a white or yellowish powder appearance and is easy to incorporate into formulations. - It provides excellent stability and long-lasting UV protection, suitable for industrial coatings and automotive applications. - Wellt offers Tinuvin 328 in 20kg cartons, providing an ample supply for clients’ UV protection needs. - Customers are encouraged to contact Wellt to learn more about how this product safeguards items from the damaging effects of UV light. [enquiry now](#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjY5OCIsInRvZ2dsZSI6ZmFsc2V9) ![Tinuvin 328](https://welltchemicals.com/wp-content/uploads/2024/01/1-72.webp) *Tinuvin 328* ![Wellsorb UV 328 Structure](https://welltchemicals.com/wp-content/uploads/2024/01/Wellsorb-UV-328.webp) *Wellsorb UV 328 Structure* - ![SVG](https://welltchemicals.com/wp-content/uploads/2024/01/2-1.webp) ## UV 328 Technical Data Our product brand: Wellnox UV 328 ### CAS NO.: 25973-55-1 CHEMICAL NAME: 2-(2’-Hydroxy-3’,5’-Di-tert-Amylphenyl) Benzotriazole ## Tinuvin 328 & UV 328 Specifications | Appearance : | | White or yellowish powder | | --- | --- | --- | | Purity (%) | | 99 min. | | Light transmittance (%) | 460 nm: | 97min. | | (10g/100ml toluene) | | | | | 500 nm: | 98 min. | | Volatile£¨%£© | | 0.5 max. | | Melting point(¡æ) | | 80-88 | - [![PDF svg](https://welltchemicals.com/wp-content/uploads/2024/01/2-17.webp)](https://welltchemicals.com/wp-content/uploads/2024/01/TDSWellsorb-UV328.pdf) ## [Tinuvin 328, UV 328 Technical Data Sheet PDF](https://welltchemicals.com/wp-content/uploads/2024/01/TDSWellsorb-UV328.pdf) Click to download accessories for our products ## Tinuvin 328 & UV 328 For Sale Get Tinuvin 328 and UV 328, superior UV absorbers now available for purchase. Improve the durability and lifespan of your products with these dependable additives. Don’t miss this chance to enhance your business’s offerings with these industry-leading UV protection solutions. [Tinuvin 328 & UV 328 For Sale](https://welltchemicals.com/wp-content/uploads/2024/01/3-18.webp) [Tinuvin 328 & UV 328 For Sale](https://welltchemicals.com/wp-content/uploads/2024/01/4-15.webp) [Tinuvin 328 & UV 328 For Sale](https://welltchemicals.com/wp-content/uploads/2024/01/6-4.webp) ## Welcome to Our UV 328 Factory! [factory display -1](https://welltchemicals.com/wp-content/uploads/2024/01/2-3.webp) [factory display -2](https://welltchemicals.com/wp-content/uploads/2024/01/2-10.webp) [factory display -3](https://welltchemicals.com/wp-content/uploads/2024/01/3-4.webp) [factory display -4](https://welltchemicals.com/wp-content/uploads/2024/01/4-4.webp) [factory display -5](https://welltchemicals.com/wp-content/uploads/2024/01/5.webp) [factory display -6](https://welltchemicals.com/wp-content/uploads/2024/01/6.webp) ![Why Wellt's UV 328?](https://welltchemicals.com/wp-content/uploads/2024/01/7-3.webp) *Why Wellt's UV 328?* - ![SVG](https://welltchemicals.com/wp-content/uploads/2024/01/2-1.webp) ## Why Wellt's UV 328？ 1. Wellt’s UV 328 offers superior UV absorption, enhancing polymer durability. 2. It has broad compatibility, making it versatile across various applications. 3. Its high thermal stability ensures long-lasting protection under extreme conditions. 4. Wellt’s UV 328 is cost-effective, ensuring quality without compromising on budget. [enquiry now](#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjY5OCIsInRvZ2dsZSI6ZmFsc2V9) ## Related Product Recommendation ![Antioxidant DSTDP](https://welltchemicals.com/wp-content/uploads/2024/01/1-1.png) irgafos 168 Discover the Best irgafos 168 & antioxidant... [Read More](https://welltchemicals.com/plastic-antioxidants/phosphite-ester/irgafos-168/) ## [Exploring The Uses And Benefits Of Tinuvin 328 (UV Absorbers):
A Comprehensive Guide in 2024](https://welltchemicals.com/blog/the-uses-and-benefits-of-tinuvin-328-a-type-of-light-stabilizer/) Dive into the world of [Tinuvin P](https://welltchemicals.com/light-stabilizers/uv-absorbers/tinuvin-p/) absorbers with this comprehensive guide. Understand their properties, explore diverse applications, and learn how they offer effective UV protection. This resource aims to equip you with technical knowledge and professional insights for 2024. ![](https://welltchemicals.com/wp-content/uploads/2024/01/995f9ce8-line4-1.webp) [For more details](https://welltchemicals.com/blog/the-uses-and-benefits-of-tinuvin-328-a-type-of-light-stabilizer/) [get support](#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjY5OCIsInRvZ2dsZSI6ZmFsc2V9) ## Latest Articles ![Ethyl Cellulose Food Grade: 6 Key Applications (2026)](https://welltchemicals.com/wp-content/uploads/2026/06/ethyl-cellulose-food-grade-applications-featured.webp) Updated June 2026 Most cellulose ethers thicken water. Ethyl cellulose... [nome](https://welltchemicals.com/blog/author/nome/ "Posts by nome")June 30, 2026 ![Importance of UV Protection in the Plastic Industry](https://welltchemicals.com/wp-content/uploads/2025/10/Importance-of-UV-Protection-in-the-Plastic-Industry.webp) Protecting Plastics and Polymers from UV Degradation for Enhanced Durability... [Adria](https://welltchemicals.com/blog/author/adria/ "Posts by Adria")October 17, 2025 ![Types of UV Stabilizers](https://welltchemicals.com/wp-content/uploads/2025/10/Types-of-UV-Stabilizers.webp) Plastics and polymers are probably amongst the most prominent materials... [Adria](https://welltchemicals.com/blog/author/adria/ "Posts by Adria")October 16, 2025 ![Types of UV Stabilizers in Masterbatch Solutions](https://welltchemicals.com/wp-content/uploads/2025/10/Types-of-UV-Stabilizers-in-Masterbatch-Solutions.webp) Plastics are essential to various industries, from packaging to construction,... [Adria](https://welltchemicals.com/blog/author/adria/ "Posts by Adria")October 15, 2025 Load More ## Frequently Asked Questions Want to know more about UV 328 ### Q: What is Tinuvin® 328? Tinuvin® 328 is a light stabilizer crafted by BASF, mainly advised for stabilizing polymers of various molecular weights, such as acrylic polymers, polyurethane, and polyvinyl butyral. ### Q: How does Tinuvin® 328 work? Tinuvin® 328 functions as a UV absorber, safeguarding polymers from UV-induced degradation, thereby enhancing the material’s durability and lifespan. ### Q: What is the everyday use of Tinuvin® 328? Tinuvin® 328 is typically incorporated into the polymer matrix during production, offering long-lasting UV resistance. ### Q: Why is Tinuvin® 328 preferred in polymer applications? Tinuvin® 328 is favored due to its prolonged UV protection capabilities that do not compromise the polymer’s aesthetics or characteristics. ### Q: What advantages does Tinuvin® 328 offer in polymer stabilization? Tinuvin® 328 helps preserve the original visual and mechanical attributes of the polymer, assuring its optimum performance in high UV exposure environments. ### Q: Can Tinuvin® 328 be combined with other stabilizers? Absolutely, Tinuvin® 328 can be paired with other stabilizers to provide thorough protection against UV degradation and meet particular formula requirements. ### Q: Is Tinuvin® 328 suitable for food contact applications? Tinuvin® 328 is not suggested for direct food contact applications as it’s intended for polymer stabilization in commercial and industrial settings. ### Q: Does Tinuvin® 328 need special handling or storage? We recommend storing Tinuvin® 328 in an excellent, dry location, away from sunlight, and following BASF’s handling guidelines to maintain product integrity. ### Q: Is Tinuvin® 328 apt for outdoor applications? Yes, Tinuvin® 328 is ideal for outdoor applications where UV exposure is likely, as it enhances the polymer material’s durability and lifespan. ### Q: Where can additional technical information on Tinuvin® 328 be found? For more technical details, such as recommended usage levels and compatibility with various polymer systems, [contact Wellt](https://welltchemicals.com/contact/). × ## Table of Contents Table of Contents Scroll to Top Get in touch with WELLT company Contact Form Demo Your Name \* Email Phone/WhatsApp Your Message Submit Form ```json {"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/welltchemicals.com\/light-stabilizers\/uv-absorbers\/tinuvin-328\/","url":"https:\/\/welltchemicals.com\/light-stabilizers\/uv-absorbers\/tinuvin-328\/","name":"Tinuvin 328 - Wellt","isPartOf":{"@id":"https:\/\/welltchemicals.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/welltchemicals.com\/light-stabilizers\/uv-absorbers\/tinuvin-328\/#primaryimage"},"image":{"@id":"https:\/\/welltchemicals.com\/light-stabilizers\/uv-absorbers\/tinuvin-328\/#primaryimage"},"thumbnailUrl":"https:\/\/welltchemicals.com\/wp-content\/uploads\/2024\/01\/1-72.webp","datePublished":"2024-01-08T03:03:36+00:00","dateModified":"2024-01-17T12:49:32+00:00","description":"Explore Tinuvin 328, a highly efficient UV absorber. 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Tinuvin® 328 is a light stabilizer crafted by BASF, mainly advised for stabilizing polymers of various molecular weights, such as acrylic polymers, polyurethane, and polyvinyl butyral.<\/p>"}},{"@type":"Question","name":"Q: How does Tinuvin® 328 work?","acceptedAnswer":{"@type":"Answer","text":"

Tinuvin® 328 functions as a UV absorber, safeguarding polymers from UV-induced degradation, thereby enhancing the material's durability and lifespan.<\/p>"}},{"@type":"Question","name":"Q: What is the everyday use of Tinuvin® 328?","acceptedAnswer":{"@type":"Answer","text":"

Tinuvin® 328 is typically incorporated into the polymer matrix during production, offering long-lasting UV resistance.<\/p>"}},{"@type":"Question","name":"Q: Why is Tinuvin® 328 preferred in polymer applications?","acceptedAnswer":{"@type":"Answer","text":"

Tinuvin® 328 is favored due to its prolonged UV protection capabilities that do not compromise the polymer's aesthetics or characteristics.<\/p>"}},{"@type":"Question","name":"Q: What advantages does Tinuvin® 328 offer in polymer stabilization?","acceptedAnswer":{"@type":"Answer","text":"

Tinuvin® 328 helps preserve the original visual and mechanical attributes of the polymer, assuring its optimum performance in high UV exposure environments.<\/p>"}},{"@type":"Question","name":"Q: Can Tinuvin® 328 be combined with other stabilizers?","acceptedAnswer":{"@type":"Answer","text":"

Absolutely, Tinuvin® 328 can be paired with other stabilizers to provide thorough protection against UV degradation and meet particular formula requirements.<\/p>"}},{"@type":"Question","name":"Q: Is Tinuvin® 328 suitable for food contact applications?","acceptedAnswer":{"@type":"Answer","text":"

Tinuvin® 328 is not suggested for direct food contact applications as it's intended for polymer stabilization in commercial and industrial settings.<\/p>"}},{"@type":"Question","name":"Q: Does Tinuvin® 328 need special handling or storage?","acceptedAnswer":{"@type":"Answer","text":"

We recommend storing Tinuvin® 328 in an excellent, dry location, away from sunlight, and following BASF's handling guidelines to maintain product integrity.<\/p>"}},{"@type":"Question","name":"Q: Is Tinuvin® 328 apt for outdoor applications?","acceptedAnswer":{"@type":"Answer","text":"

Yes, Tinuvin® 328 is ideal for outdoor applications where UV exposure is likely, as it enhances the polymer material's durability and lifespan.<\/p>"}},{"@type":"Question","name":"Q: Where can additional technical information on Tinuvin® 328 be found?","acceptedAnswer":{"@type":"Answer","text":"

For more technical details, such as recommended usage levels and compatibility with various polymer systems, contact Wellt<\/a><\/span>.<\/p>"}}]} ```