A hazardous material is any material likely to present a danger to human health or the environment. Hazardous materials can be solid, liquid or gaseous. There are 9 classes of hazardous materials known to the United Nations. The solid hazardous material can pose a danger to humans through contact or dust, so that humans inhale it. The hazardous liquid material may pose a danger to humans by flowing into the drainage system and waterways. So it will affect the person through drinking water and will also affect the wildlife. There are two main ways that hazardous materials can enter the human body and cause harm. One of them is inhalation, which will damage the lungs and respiratory system, and also ingestion, so the material enters the body with food or water. damage the digestive system.Octane with chemical formula C8H18/CH3(CH2)6CH3, molecular mass: 114.22, boiling point: 126, melting point: -56.8, subject no. 1262 presents many dangers and side effects on workers and firefighters. Therefore, we will discuss the methods and ways to prevent the dangers that can be caused by the substance. The chemical has a colorless liquid, with a characteristic odor. Dangerous air contamination will be achieved upon evaporation of this substance at 20°C. To begin with, the first type of hazard/exposure is fire and explosion. The fire is highly flammable and the vapor is heavier than normal air. It can travel a considerable distance to the ignition source and flash back. Fires can be of 3 types: small, large and fires involving tanks, cars or trailers. Vapor/air mixtures which cause explosions may constitute an acute hazard. One way to prevent this is to not open flames or sparks and not to smoke. It is also best to peel off reactions middle of paper......effective as needed so we used dry powder and foam to cut off the oxygen then the fire was brought under control so we sprayed the water to cool the fire, unfortunately our water tanks were about to empty, so we looked for a fire hydrant to fill them, after that we sprayed the whole fire and then we were able to put it out the fire, after 2 hours of fighting the fire. In the photo, the fire apparatus has reached the place and the fireman is connecting the hoses to start spraying the fire, there is also an ambulance to hospitalize the victims. Hazardous material accidents are common in warehouses and industries, the job should provide a safe place to store hazardous materials, and workers should have good knowledge of how to respond to these accidents and how to use the correct PPE and control measures to take in these types of accidents.