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Denka Electron Co., Ltd.
UV-328 Non-Inclusion Certificate (PDF Download)
UV-328 is a UV absorber (additive) that has been used in many plastic products and paints. This article provides an overview of UV-328 and its international regulatory trends, as well as precautions for product design and export.
UV-328 (2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol) has been widely used to prevent degradation of plastics, rubber, paints, etc., by absorbing ultraviolet light. However, due to the following properties, it is subject to international regulations:
It has the properties of a persistent organic pollutant (POPs) that does not easily degrade under normal natural conditions and accumulates in soil and water systems for extended periods.
Its impact on ecosystems has been confirmed, and its bioaccumulative nature, which leads to concentration in organisms through the food chain, is considered a problem.
| Regulatory Body / Legal Framework | Regulatory Content |
|---|---|
| Stockholm Convention (POPs Convention) |
Principle Prohibition Added as a persistent organic pollutant (POPs) in 2023. Largely restricted, including import and export, except for specific uses. |
| REACH Regulation (EU) |
SVHC Registration Registered as a Substance of Very High Concern (SVHC) in 2021. Likely to become a restricted substance in the future, requiring information disclosure when contained in products. |
| TSCA (USA) |
Priority Substance Designated as a priority substance. Potential for expanded use restrictions and reporting obligations in the future. |
Reducing the use of substances of very high concern like UV-328 is not only about regulatory compliance but also a way to demonstrate a company's environmental awareness and enhance its credibility. The following are effective measures to prepare for future regulatory expansion:
Consider switching to alternative UV absorbers (e.g., benzophenones, triazines) that can replace UV-328.
Conducting content surveys across the entire supply chain and collecting and managing information using tools such as chemSHERPA is effective.
It is important to establish a system, including regular updates of regulatory substance lists, development of internal databases, and training for personnel.
UV-328 designated as a globally banned/restricted hazardous substance
Regulatory tightening underway, including REACH SVHC registration and TSCA priority evaluation
Increasing cases requiring non-containment certificates for exports to EU and North America
Use of alternative materials and establishment of information disclosure systems are key for the future
If you need assistance with investigating whether your products contain UV-328 or with creating certificates, please do not hesitate to contact us.
Please feel free to contact us about issuing environmental documents, chemSHERPA compliance, and supply chain surveys.

