2710.19.11.25 - Containing more than 500 ppm of sulfur

This HTS classification, 2710.19.11.25, specifically covers certain distillate and residual fuel oils that are characterized by a sulfur content exceeding 500 parts per million (ppm) by weight. These oils are typically used as fuels in industrial furnaces, boilers, and some marine engines. The classification is applied to products that have undergone distillation or are the residual components from crude oil refining, and are not crude petroleum oils themselves.

The key distinguishing factor for this category is its sulfur content. It is differentiated from its sibling category, 2710.19.11.15, by the threshold of sulfur. While both categories fall under the broader group of distillate and residual fuel oils testing 25 degrees A.P.I. or more and possessing a Saybolt Universal viscosity at 37.8°C between 45 and 125 seconds (classified as No. 4-type fuel oils), this specific classification demands a sulfur concentration above 500 ppm. This sulfur content is a critical parameter for regulatory compliance and environmental considerations in fuel usage.

As this is a leaf node within the HTS structure, there are no further subcategories branching from 2710.19.11.25. The classification is therefore precise and is determined by the confluence of the oil type, specific gravity, viscosity, and the sulfur content exceeding the 500 ppm limit. Importers and exporters will find this category applicable to fuels that meet all these criteria and are destined for uses consistent with No. 4-type fuel oils but with a higher sulfur composition.