Which acids are transported in an MC-312 / DOT 412 Corrosive Tank?

The correct answer identifies substances that are compatible with the specifications of a MC-312 / DOT 412 Corrosive Tank. This type of tank is designed for transporting corrosive materials, particularly strong acids and bases that require special consideration due to their reactivity and the potential for causing damage to the tank and/or environmental harm.

Sulfuric acid and phosphoric acid, which are both strong acids, fall under the category of hazardous materials that the MC-312 / DOT 412 tank is specifically constructed to handle. These acids can cause severe corrosion and require tanks that can withstand their properties without compromising safety. Sodium hydroxide, while a strong base, is equally corrosive and is also suitable for transport in a tank of this specification. Transporting these substances in the MC-312 / DOT 412 is in line with regulations aimed at ensuring the safe and effective handling of hazardous materials.

The other substances listed, while they may also be acids or bases, either do not align with the corrosive nature regulated for this particular tank or do not fall under the same category of hazardous materials as the ones in the correct option. This ensures that the MC-312 / DOT 412 tank is utilized effectively and strictly according to its designated purpose.