ATO Supply Disruption

What Happened to ATO Supply?

Antimony trioxide (Sb₂O₃) has been a workhorse flame retardant synergist for decades—inexpensive, effective in halogenated systems, and reliably available. That reliability is gone.

China accounts for over 80% of global antimony production and more than 90% of refined antimony compounds. In 2024, China’s Ministry of Commerce classified antimony as a strategic material and imposed export licensing requirements. Controls tightened further through 2025, driving prices to multi-year highs and extending lead times to months.

Four Drivers of the Current Disruption

• 01
  China export controls

  Strategic material classification → export licensing requirements → supply quotas.

• 02
  Mine curtailments

  Key mines reduced output due to environmental enforcement and declining ore grades.

• 03
  Regulatory pressure

  IARC Group 2B classification driving specification reviews in automotive, W&C, and electronics.

• 04
  U.S. trade policy

  Broad tariff escalation and strategic minerals policy have further reduced import economics for U.S. buyers.

What Should Compounders Do Right Now?

• 1.
  Forward purchasing:

  ATO pricing is elevated and volatile. Forward POs with confirmed delivery dates provide cost certainty. Contact us for availability.

• 2.
  Zinc synergist evaluation:

  FL-ZS, FL-ZHS, and FL-ZB are proven commercial synergists available from U.S. stock. Most applications allow partial or full substitution—though formulation testing is required.

• 3.
  Specification review:

  For applications where ATO is purely a synergist, re-running fire performance testing with zinc alternatives may allow a specification update that removes ATO dependency entirely.