Who We Are

Core Values at the Center

TKI operates from its corporate headquarters in Phoenix, Arizona along with nationwide manufacturing plants and terminals. Our people make the difference, keeping our 7 core values at the center of our activities.



Safe and Sustainable Business

Whether we’re extracting sulfur from waste gasses at oil refineries to produce sulfur-based liquid fertilizers, eliminating the use of cyanide in precious metals mining or providing on-site wastewater reclamation services, TKI has a long track record of environmental stewardship, safety and sustainable business practices.



Continually Growing

Today’s TKI is the continually growing organization that was founded as The Kerley Chemical Company more than 70 years ago. Over the years, the company has branched into areas beyond agriculture into the mining, process chemical and crop protection industries.



Expertise and Insights

TKI R&D Team members have expertise in organic synthesis, metallurgy and hydrometallurgy, waste stream remediation and a variety of fumigants, including metam sodium and related compounds. Their work and insights are the foundation for creating new products, services and patents.


Global Presence

International in Scope

In addition to 13 U.S. production facilities, TKI has a global footprint with its Tessenderlo Kerley Ham facility in Belgium, Tessenderlo Agrochem in Turkey, sales representatives throughout Central and South America and sales offices in Mexico, Chile and Lebanon.


Tessenderlo Group

A Worldwide Specialty Company

A publicly traded company based in Brussels, Belgium, Tessenderlo Group specializes in food, agriculture, water management and on valorizing bio-residuals.