Wintersun Chemical is one of the leading international manufacturer and supplier of the chemical raw materials, pharmaceutical ingredients, intermediates and food additives in the United States. It is incorporated in the state of California in 1997 with headquarter located in Ontario, Southern California. Through the years, Wintersun Chemical has set up strong and long-term partnership with many international suppliers and customers. Our success is built on strong relationship with our quality manufacturers. This ensures we provide our customers with consistent, reliable sources of specialty chemicals.