Question 763 Deck General

The correct answer is B) Formaldehyde solutions 37% to 50%. Formaldehyde solutions with a concentration between 37% and 50% can be classified as either grade D or grade E depending on the exact concentration. This is because formaldehyde solutions in this concentration range are considered hazardous materials and are regulated accordingly by the US Coast Guard. The other options, sulfuric acid (A) and 1,1,1-trichloroethane (C), do not have this dual classification and would be consistently categorized as a single hazardous material grade.