Significant Role of HAZCHEM HAZCHEM is a code used during chemical emergencies to tell firefighters and emergency responders: What kind of hazard the chemical presents What firefighting media to use Whether evacuation or containment is required What PPE is necessary Where it is used On chemical containers, tankers, storage areas In MSDS / SDS During transport and storage of hazardous chemicals Typical HAZCHEM code structure (example: 2X or 3YE) Number (1-4) Type of firefighting method Letter (P,