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identify the criteria that determines a substance as being a hazardous material
Waste
It depends upon the material of the substance
A thick, pasty, hazardous material used for lubrication is called industrial grease. This substance is designed to be a long-term solution for heavily used piece of equipment.
hazardous material
Any substance or chemical that is left uncontained and which can cause health hazards to humans who come in contact with that substance.
Hazardous material ceases to be hazardous when it is destroyed, sufficiently diluted in nonhazardous material, it is chemically changed into a nonhazardous material or incorporated into an object that immobilizes it and renders it unable to be hazardous.
This substance is the gas carbon monoxide (CO).
If you're talking about hazardous material symbols, it's the UN identification number for the substance in the container.
which hazardous material can enter the body
Krypton gas is not a highly reactive substance, so it is not hazardous of its own accord. However, it can deplete oxygen in the atmosphere and cause asphyxiation. Krypton is known as an asphyxiant.
a. a hazardous material is exposed to fire.