Three suppliers, one mine: tier-three concentration in specialty chemicals

Key findings

• China accounted for 46% of global chemical sales in 2024, up from 24% in 2009. Europe's share fell to 13% over the same period (Cefic).
• European producers announced closures of 37 Mt of chemical capacity between 2022 and 2025, about 9% of the continent's total. Announced new investment fell from 2.7 Mt in 2022 to 0.3 Mt in 2025 (Cefic / Roland Berger).
• Two Chinese export-control pauses expire this month: the October 2025 rare-earth package on 10 November, and the US-specific gallium, germanium and antimony ban on 27 November (CMGM; Fastmarkets).

The pattern

A Gulf converter qualifies three suppliers of a flame-retardant masterbatch: one in Germany, one in India, one in Malaysia. On the supplier register this is textbook dual-sourcing plus one. Trace the chemistry one tier down and all three compound the same additive, antimony trioxide. Trace it one tier further and the antimony converges on a single dominant source country.

This is the shape GulfStream calls tier-three convergence. It is invisible in an ERP, because the ERP only knows who sent the invoice.

Why it is getting worse, not better

Two structural shifts are compounding.

The alternative supply base is shrinking. The Cefic radar counts 37 Mt of announced European closures since 2022, with 17.2 Mt announced in 2025 alone. Upstream petrochemicals lost 17.8 Mt, around 14% of that segment's capacity (Expana). Each closed European unit removes one non-Chinese option a procurement team could switch to under stress.

The mineral layer is concentrated and controlled. The IEA finds China is the leading refiner of 19 of 20 energy-related strategic minerals, at an average share of about 70% (Mining.com, on IEA GCMO 2025). Rare-earth refining is the one area where that share has moved, falling from above 90% in 2023 to 85% in 2025. The IEA also estimates that full enforcement of China's rare-earth restrictions could put $6.5tn of annual downstream production outside China at risk (Investment Monitor, on IEA GCMO 2026).

Antimony: the case in point

Antimony is a small-volume input with outsized reach into specialty chemicals. Antimony oxide is the synergist in halogenated flame-retardant systems for plastics, coatings, rubber and textiles. It is also a catalyst in polyester and PET production (USGS Minerals Yearbook).

China accounted for 48% of global antimony mine production in 2023 (ThePrint, citing USGS). Since September 2024, Chinese exports of antimony ores, metal and oxides have required a licence, whatever the destination (USGS MCS 2025). That point matters for the Gulf: the US-specific ban and its pause are headline news, but the global licensing requirement is the binding constraint for a buyer in Jubail or Abu Dhabi, and it has not been relaxed.

The November calendar

Sources: CMGM; Bytes Europe; JD Supra.

What procurement teams should do now

1. 01Map the bill of materials to the mineral. For every specialty input, identify the controlled element it contains: antimony in flame retardants and PET catalysts, yttrium and scandium in advanced ceramics and coatings, rare earths in catalysts and magnets.
2. 02Count real alternatives, not suppliers. Score substitutability by independent tier-three sources, not by tier-one vendors.
3. 03Ask for origin declarations in writing. Request country of origin for the controlled element, not just for the compound you buy.
4. 04Set triggers on the dates above. Pre-agree price and allocation terms for the case where a pause lapses.

Method note

The masterbatch example is an illustrative supply structure, not a GulfStream client finding. All market and policy figures are from the sources linked. GulfStream's measured tier-three concentration data for GCC importers will follow in a later drop.