Swanson, Director, Investor Relations, PolyOne Corporation, +1 440-930-1018, eric.swanson@avient.com, Media: Kyle G.

Investor Relations Contact: Joe Di Salvo, Vice President, Treasurer and Investor Relations, PolyOne Corporation, +1 440-930-1921, giuseppe.disalvo@avient.com; Media Contact: Kyle G.

Swanson, Director, Investor Relations, PolyOne Corporation, +1 440-930-1018, eric.swanson@avient.com | Media - Kyle G.

Giuseppe (Joe) Di Salvo, Vice President, Treasurer and Investor Relations, Avient Corporation, +1 440-930-1921, giuseppe.disalvo@avient.com, Media Contact: Kyle G.

Swanson, Director, Investor Relations, PolyOne Corporation, +1 440-930-1018, eric.swanson@avient.com; Media Contact: Kyle G.

Swanson, Director, Investor Relations, PolyOne Corporation, +1 440-930-1018, eric.swanson@avient.com, Media Contact: Kyle G.

OnColor™ Naturals Colorants OnColor™ SC Super Concentrate Technologies OnColor™ SC Super Concentrate Technologies

Silicon dioxide is a natural compound of silicon and oxygen found mostly in sand. PROPERTY DETAIL Physical State Solid Form Powder Color White Odor Odorless Melting Point >1700°C Boiling Point >1700°C Bulk Density Typically 50–600 g/L Water Solubility 15–68 mg SiO2/L at 20°C Self-Ignition Temperature Not combustible Flammability Non-flammable Explosiveness Non-explosive Oxidizing Properties Expected to be non-oxidizing PHYSICAL/CHEMICAL PROPERTIES EFFECT ASSESSMENT RESULT Acute Toxicity/ Oral Inhalation/Dermal Not acutely toxic after oral and dermal exposure.

Examples include: • Dyneema®, the world’s strongest fiber™, enables unmatched levels of performance and protection for end-use applications, including ballistic personal protection, marine and sustainable infrastructure and outdoor sports • Unique technologies that improve the recyclability of products and enable recycled content to be incorporated, thus advancing a more circular economy • Light-weighting solutions that replace heavier traditional materials like metal, glass and wood, which can improve fuel efficiency in all modes of transportation and reduce carbon footprint • Sustainable infrastructure solutions that increase energy efficiency, renewable energy, natural resource conservation and fiber optic / 5G network accessibility Avient is certified ACC Responsible Care®, a founding member of the Alliance to End Plastic Waste and certified Great Place to Work®. To access Avient’s news library online, please visit www.avient.com/news # # # Investor Relations Contact: Giuseppe (Joe) Di Salvo Vice President, Treasurer and Investor Relations +1 440-930-1921 giuseppe.disalvo@avient.com Media Contact: Kyle G.

Naturally. OnColor™ Naturals Colorants OnColor™ SC Super Concentrate Technologies