🔍 Key Concepts

• 46 CFR Part 30–35 tank vessel regulations for flammable/combustible liquids • Difference between Grade A, B, C flammable vs Grade D, E combustible liquids • How flash point and vapor pressure determine a liquid’s grade

💭 Think About

• Think about whether camphor oil behaves more like gasoline (very volatile), kerosene (less volatile), or a heavier oil when it comes to how easily its vapors ignite. • Ask yourself: is camphor oil generally treated as a high‑hazard, low‑flash‑point cargo, or as something that needs heat or a higher temperature to give off ignitable vapors? • Consider where camphor oil would likely fall on a scale from most dangerous vapors (low flash point, high vapor pressure) to least dangerous vapors (higher flash point, lower vapor pressure).

✅ Before You Answer

• Review the flash point ranges typically associated with Grade A vs Grade C vs Grade D/E (in 46 CFR cargo classifications). • Confirm whether camphor oil is normally shipped and stored at ambient temperature without special low‑temperature controls, which suggests a higher flash point. • Eliminate any grades that are reserved for extremely volatile liquids with very low flash points similar to aviation gasoline or highly refined solvents.