What type of materials can be transported in an MC 312 chemical cargo tank?

The MC 312 chemical cargo tank is specifically designed for transporting certain types of hazardous materials, particularly those that fall under the category of corrosive substances. This design includes features that ensure the safe containment of corrosives, such as sulfuric acid, which can cause severe damage to tanks if not properly managed.

The construction of an MC 312 tank allows it to withstand the corrosive nature of these materials, ensuring that they can be transported without risk of leakage or rupture. In contrast, flammable liquids, compressed gases, and liquids under low pressure require different types of containment systems (like MC 307 for flammable liquids and MC 331 for compressed gases), which are designed to handle their particular hazards and characteristics. Thus, the capabilities of the MC 312 tank make it suitable for carrying corrosives, reaffirming the choice as the correct answer.