Depending on its concentration, which...

🔍 Key Concepts

• Grade D and Grade E flammable and combustible liquids as defined in 46 CFR Subchapter D (Tank Vessels) and related cargo regulations • How concentration (percentage strength) can change the hazard class of a chemical solution • The difference between a pure substance and a solution or mixture for cargo grading purposes

💭 Think About

• Which listed products are normally carried as solutions of varying strength rather than as a single fixed pure chemical cargo? • Think about which of these substances has its fire or vapor hazard significantly changed when the concentration goes up or down. • Ask yourself: for which cargo would the regulations specifically mention a concentration range when assigning a grade?

✅ Before You Answer

• Check which cargo in the list is commonly described in regulations with a percentage concentration range rather than a single name. • Verify in 46 CFR cargo tables whether any of these substances can appear in more than one grade depending on strength. • Confirm which item is clearly a solution with variable concentration rather than a single fixed compound.

Depending on its concentration, which product(s) can be classified as either grade D or E?

1,1,1-trichloroethane

Sulfuric acid

Formaldehyde solutions 37% to 50%

All of the above

🔍 Key Concepts

💭 Think About

✅ Before You Answer