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SI Group is the world’s largest producer of liquid phosphites, specialty antioxidants and additives in non-dust forms, including its patented ANOX™ NDB™ stabilizer blend technology that enables up to eight components to be delivered in a single homogeneous blend. Recognized for its extensive portfolio of specialty additives, including light stabilizers, polymer modifiers, polymerization inhibitors and intermediates, SI Group is the former antioxidant and UV stabilizer solutions business of Chemtura Corporation (later known as Addivant). The company's global headquarters is in Schenectady, NY USA, with regional offices in Al Jubail, Saudi Arabia; Basel, Switzerland and Shanghai, China. It has over 30 manufacturing plants on five continents, as well as research and sales facilities around the globe.