When people think about the Strait of Hormuz, they think about oil tankers, LNG carriers, naval escorts, insurance premiums, and the price of gasoline. They generally do not think about yellow piles of sulfur beside gas plants, phosphate fertilizer complexes, or the acid circuits that keep copper and nickel processing running. They should. The current sulfur price spike is not just another commodity-market twitch. It is a preview of a future in which the cheap sulfur system created by oil and gas cleanup is much smaller, while much of the demand for sulfur remains...

For roughly fifty years, sulfur has been cheap for a strange reason. Oil refineries and sour gas plants had to remove it anyway. Sulfur in fuels is a pollution problem. Regulations forced the oil and gas industry to take sulfur out of refined products and gas streams, and the industry recovered it as elemental sulfur. The sulfur was not the main product. It was the cleaned-up contaminant. That is a very different cost structure from opening a mine, building a roaster, managing residues, and producing sulfur deliberately...

The old low-price regime put sulfur in the $50 to $150 per ton range for long stretches. That world was built on fossil byproduct abundance. A managed transition world might put sulfur in the $250 to $350 per ton range. A structurally tighter oil and gas-light world could easily live in the $400 to $600 per ton range. Regional crises, shipping disruptions, export restrictions, or sudden HPAL nickel demand can push sulfur into the $800 to $1,200 per ton range. The point is not that every future year looks like a crisis. The point is that the old fossil byproduct floor is unlikely to be the future floor...

The logistics problem is the part that deserves more attention. Today’s model works because elemental sulfur moves better than sulfuric acid. A fertilizer producer can import sulfur, burn it on site, integrate the acid plant . . . and ship finished fertilizer...

That means the future sulfur constraint is geographical as much as chemical. The winners are likely to be integrated hubs with two or three of the required pieces in the same place. Phosphate rock plus sulfur access plus port logistics is powerful. Smelter acid plus local mining demand is powerful. Pyrite waste plus acid demand plus permits can be powerful. A lonely inland fertilizer plant that depends on imported acid is not powerful. It is exposed...

Policy makers should be paying attention because sulfur sits in the awkward space between agriculture, mining, trade, and decarbonization. Countries should map sulfur and sulfuric acid dependency. They should identify where smelter acid, pyrite, tailings recovery, phosphate fertilizer, and mineral processing can be linked in real industrial hubs. They should stress-test fertilizer and critical-mineral projects against sulfur prices far above the old fossil byproduct norm...

...Modern agriculture and mining were built in part on cheap sulfur from oil and gas. As the world moves away from oil and gas, sulfur does not disappear, but the cheap arrangement does. The future price of sulfur is unlikely to be the old $50 to $150 per ton world. It is more likely to sit structurally closer to today’s stressed market than most fertilizer, mining, and policy models assumed a few years ago. The sooner that is treated as a supply-chain design problem instead of a temporary commodity spike, the less painful the adjustment will be.