Rooted in History, Focused on the Future
Carus has a rich history of resilience, innovation, and adaptability, evolving from its early 20th-century beginnings into a leader in environmental solutions. Over more than a century, Carus has transformed to meet changing global needs, overcoming challenges and seizing opportunities to expand its expertise. What began as a chemical company has grown into a mission-driven organization focused on addressing complex challenges in water treatment, air purification, and soil remediation. With an enduring commitment to research, technical excellence, and customer collaboration, Carus continues to drive progress while honoring its legacy of resilience and vision for a sustainable future.
Carus’ journey is marked by significant milestones that reflect our growth, innovation, and dedication to solving environmental challenges. From pioneering advancements in chemical manufacturing to expanding our solutions for cleaner air, water, and soil, each chapter in our history tells a story of progress and purpose. Explore our timeline to see how Carus has evolved over the decades to become a global leader in environmental solutions.
1915
Two years before the U.S. enters World War I, the price of European imports has begun to soar. The U.S. experiences a shortage of potassium permanganate. Twenty-five-year-old Edward Hegeler Carus, a mathematics professor, comes home to LaSalle, IL to find a solution.
Carus creates a makeshift laboratory in an old barn behind his family’s home in LaSalle, the Hegeler Carus Mansion, and begins developing a process for the manufacture of potassium permanganate.
1920s
In the aftermath of World War I, potassium permanganate prices drop, forcing all U.S. producers out of business. Of the more than 20 shuttered U.S. manufacturers, Carus is the only one to eventually reopen its doors. Carus invests in new, more efficient technology.
By 1923, the company is back in business. Karl Kleimenhagen, one of Carus’ early innovators, invents the world’s first electrolytic permanganate cell, a design which remains the basis of electrolytic permanganate cells still in use nearly a century later.
1930s
In the mid-1930s, Carus builds a new plant for the manufacture of two growing product lines: manganese sulfate and hydroquinone. Carus was the first company to provide large quantities of manganese sulfate to Florida for use in fertilizer for the state’s sandy soil. This fueled a boom in Florida’s agricultural industry.
Hydroquinone is a chemical used for developing photos, which Carus manufactured until the late-1970s. Some of Carus’ earliest innovators, including Karl Kleimenhagan and Joseph Schumacher, held patents for Carus’ hydroquinone manufacturing process.
1940s
World War II spikes demand for potassium permanganate, used in nylon production at the time. Carus expands its facility and operates around the clock. For its wartime efforts, Carus becomes one of the first companies to be offered the Army-Navy E Award. Carus respectfully declines the recognition, avoiding publicity and possible threat of sabotage.
1950s
Dr. Edward Hegeler Carus gives management responsibilities to his sons, Blouke and Paul. Blouke leads a significant plant modernization, and after ten years Carus has patented technological advances that position the company as a world leader in potassium permanganate production.
By 1961, a batch of potassium permanganate, which had taken a week to produce in 1951, was produced in 12 hours. Carus intensifies its marketing and researches new product uses. The company develops the potassium permanganate method for water treatment and introduces it to cities throughout the U.S.
1960s
Carus grows to become the world’s largest producer of potassium permanganate. Production capacity is at an all-time high. Carus creates the brand name CAIROX® potassium permanganate (originally spelled Carox) and forms new marketing strategies. The company also increases its sales and marketing staff, and strengthens its position in diverse markets like metal descaling, air purification, and beeswax bleaching.
As a result of increased customer interaction, Carus is able to tailor products and services to meet specific customer needs. A new free-flowing grade of CAIROX® is designed to be more user-friendly, and to allow Carus to ship larger quantities to customers.
1970s
Carus offers new environmental solutions and new services to identify and meet customer needs. New solutions include air scrubbing technology. The Environmental Protection Agency and the Safe Drinking Water Act are established. Carus helps industries and communities meet new regulations.
1980s
Carus completes a major plant expansion. One year later, a global recession and the loss of Carus’ largest customer give Carus the opportunity to demonstrate its resilience. With research and innovation, Carus emerges with new solutions for wastewater treatment, air purification, and the electronics industry. Carus also enters the fashion industry, developing a product used by designers to create the iconic stone-washed denim look.
2000s
Carus acquires the potassium permanganate business of Industrial Química del Nalón (IQN) of Oviedo, Spain. The focus of the newly-formed European subsidiary is to grow Carus’ international market reach. Carus also acquires a phosphate company in Belmont, NC.
Inga Carus, formerly European Sales Manager for Carus, becomes President and CEO in 2005, representing the third generation of the Carus family to lead the company.
2010
Carus is nationally recognized for excellence in community service as the 2010 recipient of the National Association of Manufacturers’ Sandy Trowbridge Award.
2014
Carus reduces energy use at its largest manufacturing facility twenty-eight percent in five years, becoming a four-time recipient of the Responsible Care® Energy Efficiency Award, and a 2014 recipient of the Governor’s Sustainability Award.
2015
In 2015, Carus celebrates its first 100 years with a Centennial Picnic at the Hegeler Carus Mansion, a community-wide holiday open house at the Peru Headquarters, and a Centennial Scholarship for a college student who proposes a new way to use chemistry to solve an environmental problem.
2022
In 2022, Carus celebrates the thirty-fifth anniversary of its Tuition Assistance Program, marking more than $5 million in tuition reimbursement.
Carus also celebrates 20 years of Summer Science Camp. The annual camp is free of charge for local students, and focuses on developing in-demand STEM skills like communication, problem solving, and critical thinking.
2023–2024
Following a January 2023 fire, the Carus team once again demonstrated remarkable resilience and innovation, overcoming significant operational challenges to meet the needs of customers worldwide while rebuilding and expanding its packaging and warehouse facilities. This milestone reflects Carus’ commitment to continuous improvement, with enhanced safety measures, sustainability initiatives, and operational efficiencies.
Our Culture: Where Values Drive Impact
At Carus, our culture is built on a foundation of Trust, Collaboration, Resourcefulness, and Results—the Core Values that guide every decision, every project, and every interaction. These values aren’t just words; they are the principles that shape how we work together and how we serve our customers and communities. From our laboratories to our offices and manufacturing floors, Carus team members share a commitment to making a meaningful difference in the world.
We believe that every team member plays a vital role in driving our mission to create cleaner, safer environments. Whether it’s delivering exceptional service to customers, innovating sustainable solutions, or supporting one another, our people are the heartbeat of our success.
Trust
We treat each other with respect, dignity, and fairness.
Collaboration
We share knowledge with each other.
Resourcefulness
We focus on options rather than limitations.
Results
We do not confuse efforts with results.