Many chemicals used in hair salons can cause conditions ranging from minor skin irritation to serious injury and disease. If workers are expected to work with hazardous materials, their employer is required to inform them that the materials are hazardous and train the workers in their safe use. All NT and NU workplaces that use materials identified as hazardous (“controlled products”) by the Workplace Hazardous Materials Information System (WHMIS) are required to follow the WHMIS system. The system uses consistent labelling to help workers recognize hazardous materials. The system and labels provide specific information on handling, storing, disposing, and 1st aid procedures of hazardous materials.