Carbon disulfide is listed as a hazardous air pollutant under the Clean Air Act and is subject to EPA Toxic Release Inventory (TRI) reporting thresholds at receiving facilities. It is also a DOT flammable liquid hazmat, requiring proper packaging, placarding, and emergency response documentation. TSCA import certification is required at entry.

Heading 2813 specifically names 'commercial phosphorus trisulfide,' which is a technical-grade mixture used in pyrotechnics and matches, as distinct from chemically pure phosphorus sulfide compounds. If a product is a chemically defined pure compound outside the named species, it may fall under the NESOI provision of 281390 or require a binding ruling to confirm classification.