What type of tanks is categorized as "Chemical hauler"?

The classification of a "Chemical hauler" specifically refers to tanks that transport liquid chemicals, which require specialized design features to ensure safe transport under various conditions.

MC-307/DOT 407 tanks are designed for transporting a wide range of liquid chemicals, including hazardous materials. These tanks are constructed to handle materials that may have specific chemical properties, such as corrosiveness or a propensity to react under certain conditions. This versatility in transporting various chemical substances qualifies them as chemical haulers.

The MC-301 is generally designed for food-grade and non-hazardous materials, and MC-331 is used specifically for transporting liquefied gases under pressure, while MC-312 is applicable for transporting some corrosive materials but is primarily tailored for petroleum products. Therefore, the MC-307/DOT 407 is distinct in its capability to handle a broader range of liquid chemicals, thus earning the designation of "Chemical hauler."