An oxidizing agent or material gives up oxygen easily or can readily oxidize other materials. Examples of oxidizing agents are oxygen, chlorine and peroxide compounds. These chemicals will support a fire and are highly reactive. Under the Canadian Controlled Products Regulations (CPR) and under the U.S. OSHA Hazcom Standard, there are specific criteria for the classification of materials as oxidizing materials. The CPR is part of the national Workplace Hazardous Materials Information System (WHMIS).