These companies manufacture herbicides, pesticides, insecticides, and fungicides used in agriculture and sell them through wholesalers or distributors.

These companies produce seeds that eventually turn into food. Examples include cuttings, seedlings, and bulbs for growing plants for food. Sometimes called plant propagation.

These companies make fertilizers used for various types of agricultural products. They tend to be bought (i.e. not mined or extracted) and mixed to create a final product.

These companies produce petrochemical feedstocks, which are generally destined to become part of plastic.

These companies produce chemical intermediates, also known as monomers, which are the most basic chemicals that are eventually polymerized into polymers, and then into plastic. Examples of chemical intermediates include chlorine, ethylene, propylene, styrene, olefins, and alkenes.

These companies produce diversified chemicals, such as solvents, additives, adhesives, and plastics.

These companies produce structural additives that are incorporated into a variety of polymers. These additives are used to enhance certain structural properties of polymers (i.e. become less brittle at room temperature, change the color of a plastic, or use a cheaper filler than the actual, more expensive plastic compound). Examples of these chemicals include plasticizers, fillers, and colorants.

These companies manufacture plastics for diversified products and sell directly to their customers.

These companies produce polymerized chemicals that have not yet had additives added. These are the output when individual intermediate building blocks are bonded into long chains called polymers. Without added additives, these polymers are not in their functional form. Often they will be called polymer resins or have the prefix poly.

These companies produce fragrance and cosmetics ingredients. They are combined to produce fragrance and cosmetic compounds, which are incorporated into Includes, deodorant, perfume, cosmetics, etc.

These companies make chemicals and additives that get incorporated into pharmaceutical and food resources.

These companies manufacture diversified catalysts for industrial and automotive (consumer passenger car industry) use and sell directly to their customers.

These companies manufacture coatings (paints and lacquers) and insulation / fiberglass for diversified products and sell directly to their customers.