The key criterion is formulation intent: 350510 covers modified starches and dextrins in their ingredient form, regardless of their inherent adhesive properties. Once the product is compounded and presented as a glue or adhesive, it moves to 350520. Products sold in bulk as industrial ingredients typically stay in 350510 even if they exhibit tackiness.

Modified starches intended for food use are subject to FDA oversight under food additive and GRAS regulations. Industrial-grade modified starches not destined for food contact generally clear without FDA review, but importers should ensure labeling and end-use documentation clearly reflect the intended application to avoid scrutiny at entry.