Nisus Corporation®
Chemical ManufacturingTennessee, United States51-200 Employees
Nisus Corporation is a chemical manufacturer that serves industry professionals with pest control and wood preservation products, prioritizing solutions that minimize environmental impact. It is based in Rockford, Tennessee, and operates as a mid-sized company. A notable portion of its portfolio relies on borate as an active ingredient; borates are mineral salts mined from the earth that are lethal to insects while exhibiting low mammalian toxicity and posing minimal risk to people, pets, and the environment. In its wood preservation division, Nisus produces copper naphthenate under the QNAP brand and markets a borate-based preservative under the Cellutreat label. QNAP can be used on its own or in combination with Cellutreat, and Cellutreat can be used with QNAP or creosote; both products are EPA-registered general-use preservatives standardized by the American Wood Protection Association. In 2026 Nisus announced a partnership with NPMA PestWorld.