NOTE: On July 1, 2020, PolyOne and Clariant Masterbatch joined together as Avient, a new  kind of materials company focused on conquering customer challenges and unlocking the potential for innovation and sustainability around the globe. Michelle Maniscalco Senior Manager, Marketing Communications Avient Corporation +1 440-930-1988 michelle.maniscalco@avient.com

Swanson Director, Investor Relations PolyOne Corporation +1 440-930-1018 eric.swanson@avient.com Rose Vice President, Corporate Communications PolyOne Corporation +1 440.930.3162 kyle.rose@avient.com

The effective date of the replacement sections was deferred to December 1, 2025 when USP 661 will be replaced by USP 661.1 and USP 661.2. In the interim, testing under USP 661.1 and USP 661.2 is permitted by USP, and packaging systems conforming to these requirements prior to December 1, 2025 are considered to be in conformance with the USP–NF.  

Attachment 1 Special items (1) 1)

Hohenrhein 1 No:6/1 No: 149/1

WHITE 660 AD-1 RED 1077 AD-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X GT 41453-0002A-01-1 X 41839-01A-01-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X GT-18029-1-6 MM498B-1 WHITE NP (New Pigment Disp) Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

GF 1266 A 33 HS NAT 1 X GT-21973-02-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

February 1, 2023 NEW DELHI, India – February 1, 2023 – For the first time in 5 years, Avient will participate in PlastIndia 2023, where it will be exhibiting its latest innovations and initiatives of sustainable and specialized material solutions for the plastics industry. Avient will exhibit at Hall 5/First Floor/Booth A5 at PlastIndia 2023 in Pragati Maidan, New Delhi, from February 1 to 5.