Final answer:
The first step in determining the hazard class of a hazardous material is to provide its classification as an atomic element, molecular element, molecular compound, or ionic compound.
Step-by-step explanation:
The first step involved in making a determination as to the hazard class of the hazardous material is to provide the classification of each substance. This classification can include atomic element, molecular element, molecular compound, or ionic compound. By identifying the classification of the hazardous material, we can begin to understand its properties and potential hazards.