Review disclosures made to the Audit Committee by the Company’s CEO and CFO during their certification process for reports on Form 10-K and Form 10-Q about any significant deficiencies in the design or operation of internal controls and procedures or material weaknesses therein and 4 any fraud involving management or other employees who have a significant role in the Company’s internal controls and procedures. 10.

Seller warrants good and clear title in goods subject to the sale (“Product”) and that the Product conforms at the time of shipment to a Certificate of Analysis, a Certificate of Compliance, or a Product Specification Sheet, if any such document exists, and other specifications signed by Seller (“Specifications”).

Seller warrants good and clear title in goods subject to the sale (“Product”) and that the Product conforms at the time of shipment to a Certificate of Analysis, a Certificate of Compliance, or a Product Specification Sheet, if any such document exists, and other specifications signed by Seller (“Specifications”).

Activities beyond these standards include environmental impact assessments, enterprise risk assessments, product carbon footprinting, ISO 14001 & ISO 50001 certifications at selected sites, and risk identification in product and process safety. We have received third party certification from TÜV Rheinland. We have received third party certification from TÜV Rheinland.

P O L Y O N E C O R P O R A T I O N Exhibit 31.1 CERTIFICATION I, Stephen D. P O L Y O N E C O R P O R A T I O N Exhibit 32.2 CERTIFICATION PURSUANT TO 18 U.S.C. ANNUAL CERTIFICATIONS PolyOne Corporation included as Exhibits 31.1 and 31.2 to its Annual Report on Form 10-K for 2011, filed with the Securities and Exchange Commission, certificates of its Chief Executive Officer and Chief Financial Officer certifying the quality of PolyOne’s public disclosure.

They are formulated with  raw materials that are pre-tested to ISO, USP, EP and ICH Q3D protocols to mitigate the risk of product non-compliance of healthcare products.

We hold the American Chemistry Council's certification as a Responsible Care Management System® (RCMS) company. s/ Ernst & Young LLP Cleveland, Ohio February 22, 2023 Exhibit 31.1 CERTIFICATION I, Robert M. AVIENT CORPORATION Exhibit 32.2 CERTIFICATION PURSUANT TO 18 U.S.C.

Further, we recently achieved the American Chemistry Council's certification as a Responsible Care Management System® (RCMS) company. Wulfsohn POLYONE CORPORATION68 Exhibit 31.1 CERTIFICATION I, Robert M. POLYONE CORPORATION Exhibit 32.2 CERTIFICATION PURSUANT TO 18 U.S.C.

Seller warrants good and clear title in goods subject to the sale (“Product”) and that the Product con- forms at the time of shipment to a Certificate of Analysis, a Cer- tificate of Compliance, or a Product Specification Sheet, if any such document exists, and other specifications signed by Seller (“Specifications”). Säljaren garanterar att de produkter som är föremål för försäljningen (”Produkten”) är fria från rättsliga fel och att Produkten vid leveranstidpunkten stämmer överens med ett så kallat ”Certificate of Analysis”, ett ”Certificate of Compliance” eller ett ”Product Specification Sheet”, om något sådant existerar, och med andra specifikationer undertecknade av Säljaren (”Specifikationer”).

For our sensitive applications, we have implemented ISO 13485 and Good Manufacturing Processes (GMP). 100% of our facilities producing those sensitive applications and warehouses are GMP audited within a 3–year period. In addition to our certification as an ACC Responsible Care® company, PolyOne has over 140 third-party certifications across multiple areas of expertise. Our third-party certifications span Quality, Environmental, Health & Safety, Automotive Quality, Laboratory Testing and Food Safety.