2710.19.06.25 - Fuel oil No. 5

This category, HTS Code 2710.19.06.25, specifically classifies Fuel Oil No. 5. Fuel Oil No. 5 is a heavier grade of fuel oil characterized by specific physical properties, notably its viscosity and API gravity. It falls under the broader umbrella of distillate and residual fuel oils, which are derived from petroleum or bituminous minerals. These oils are primarily used as industrial fuels, often in applications requiring sustained heat generation.

Fuel Oil No. 5 is distinguished from its sibling categories primarily by its technical specifications. While still classified as a heavy fuel oil with a Saybolt Universal viscosity at 37.8°C of more than 125 seconds and testing under 25 degrees API, it represents a distinct grade within this viscosity range. For instance, Fuel Oil No. 6 (HTS Code 2710.19.06.30) is typically a heavier, more viscous fuel. The "Other" category at this level (HTS Code 2710.19.06.35) serves as a catch-all for fuels meeting the broader criteria but not specifically identified as No. 5 or No. 6.

As this is a leaf node in the HTS classification, there are no further subcategories branching from Fuel Oil No. 5. Therefore, the classification concludes at this level, with the primary means of distinguishing this product being its adherence to the specific viscosity and API gravity standards defining Fuel Oil No. 5. Importers and exporters should ensure their product documentation accurately reflects these technical characteristics to ensure correct classification.