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.

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.

Media Contact: Kyle G.

Kyle G.

Media Contact: Kyle G.

Substance Safety Summary SUBSTANCE: Antimony Trioxide GENERAL STATEMENT Antimony trioxide is a naturally occurring mineral found in the earth’s crust. DOCUMENT NUMBER_ SSS-003 CATEGORY DETAIL EC Number 215-175-0 CAS Number 1309-64-4 Name Subclass 1 Antimony Trioxide (ATO) Structural Formula CHEMICAL IDENTITY PROPERTY DETAIL Physical State Solid Form Powder Color White Odor Odorless Melting Point 656°C Boiling Point 1425°C Bulk Density 5.20 g/cm3 Water Solubility Slightly Soluble PHYSICAL/ CHEMICAL PROPERTIES DOCUMENT NUMBER_ SSS-003 HEALTH EFFECTS HUMAN HEALTH SAFETY ASSESSMENT Consumer It is very unlikely that consumers would be exposed to ATO in its concentrated form because it is only sold for industrial use to make polymers and other products and is not sold directly to consumers. Antimony, being a natural element, cannot by definition be degraded.

TiO2 is a naturally occurring mineral used as a bright white pigment for paint, in the food industry as a coloring, in sunscreens and cosmetics, and in other industrial uses. PHYSICAL/CHEMICAL PROPERTIES DOCUMENT NUMBER_ SSS-002 CATEGORY DETAIL EC Number 236-675-5 CAS Number 13463-67-7 Name Subclass 1 Titanium Dioxide (TiO2) Structural Formula O======Ti====== O PROPERTY DETAIL Physical State Solid Form Crystalline Color White Odor Odorless Melting Point 1560–1843°C Boiling Point 3,000°C Bulk Density 3.9 g/mL at 25°C Water Solubility Immiscible DOCUMENT NUMBER_ SSS-002 HEALTH EFFECTS HUMAN HEALTH SAFETY ASSESSMENT Consumer Based on available data, TiO2 is not a hazardous substance. COMPANY CONTACT INFORMATION corporateregulatory@avient.com ENVIRONMENTAL EFFECTS The substance is a natural mineral.

Chemical formula: CaCO3  Density: 2.71 g/cm3 Hardness (Mohs): 3   Chemical formula: SiO2 Density: 2.65 g/cm3 Hardness (Mohs): 7 Graphite fillers, which can be natural flake or synthetic, provide electrical and thermal conductivity.