Organic chemicals are frequently contested at the border because the same compound may be classifiable under Chapter 29 as a pure chemical, under Chapter 38 as a prepared chemical product, or under another chapter based on its primary use. Purity thresholds and whether the product is a defined compound or a mixture are the most common points of dispute.

Section 301 tariffs on Chinese-origin organic chemicals have accelerated supplier diversification, with importers increasingly qualifying sources in India, South Korea, and ASEAN countries. However, switching suppliers for specialty intermediates requires rigorous re-qualification of purity specifications and process chemistry, which can extend lead times significantly.