The market watches the barrel, the cargo is something else
When Tehran talks about a "full offensive" in the Strait of Hormuz, and Washington threatens Oman, which controls the southern shore of that passage, the market reflexively converts everything into oil. It is the most liquid, most heavily positioned and fastest priced piece of the puzzle. The problem is that oil has buffers: strategic reserves, spare OPEC capacity, pipelines that bypass the strait (the Saudi East, the West and the line from Abu Dhabi to Fujairah). Chemical cargoes from the very same port have none of those protections.