The entry's conclusion is that sulfur is the compendium's cleanest commodity-layer Tindale cascade: because over 80% of global supply is a byproduct of hydrocarbon desulfurization rather than a directly mined resource, six independent demand shocks all collide with the same unscalable rate limiter, and the outcome is not scarcity but concentration — pricing power shifting to Middle East producers and dependency stacking on seven Asian buyer economies that remain Hormuz-hostage even after diversifying their oil routes.
The diagnostic. Sulfur fails the elasticity test every other strategic input passes — price signals redistribute the existing byproduct stream but cannot summon new supply, evidenced by Tampa contract sulfur rising from $69/LT in Q1 2024 to $310/LT by October 2025.
Six converging triggers. Decarbonization of refining, net-zero pressure on sour gas, EV-driven nickel HPAL demand, copper electrification, Hormuz disruption, and Caspian transit risk each run a distinct cascade chain, but all bottleneck on the same global sulfuric-acid supply, which is projected to fall 40–130% short of the ~400 Mt 2040 demand.
Concentration, not decline. Because OECD refining contracts first while Aramco, ADNOC, and Tengizchevroil remain the lowest-cost processors, Middle East sulfur share could mechanically rise from ~30% toward 45–50% by the early 2030s, even without those producers doing anything differently.
The Asia bind. A single Hormuz closure would simultaneously hit India, China, Indonesia, Pakistan, Bangladesh, Vietnam, and Sri Lanka, which together take 55–65% of Middle East sulfur offtake — exposure that survives even successful oil-bypass infrastructure like CPEC, since sulfur moves only by sea.
Invisibility to policy. Sulfur sits on no critical-minerals list and has no liquid futures market, so the entry proposes two new framework concepts — Byproduct Dependency Inversion and Concentration Cascade — and flags amendments to the Iran and Pakistan entries to formalize sulfur as a parallel, currently underpriced chokepoint.