The mission of the International Antimony Association (i2a) is to inspire product stewardship along the antimony value chain.  This mission is accomplished by generating and sharing information concerning the environmental and health safety and societal benefits of antimony and antimony compounds.

One of the pillar regulations framing the product stewardship of antimony substances is the European REACH regulation (Regulation (EC) n° 1907/2006).  This Regulation sets the rules and steps by which information must be generated, assessed, shared and kept up to date.  However, the information is then used as a reference database on antimony and antimony substances in many other regulatory programs and various jurisdictions worldwide.

Through a common evidence base, i2a promotes a harmonized risk management and continued safe use of antimony and antimony substances across the value chain and geographical borders.


i2a represents producers, importers and distributors of 10 antimony compounds:

  1. Antimony Metal
  2. Diantimony Trioxide
  3. Diantimony Trisulfide
  4. Diantimony Tris(ethylene glycolate)
  5. Antimony Trichloride
  6. Diantimony Pentoxide
  7. Sodium Antimonate (A)
  8. Antimony Pentachloride
  9. Sodium Hexahydroxoantimonate
  10. Potassium Hexahydroxoantimonate 


The Antimony Oxide Industry Association (AOIA) was formed in 1978 to meet the requirements of the antimony oxide industry in the USA. At the time, the priority of the AOIA was to support the US Environmental Protection Agency's (US EPA) initiative  to carry out carcinogenic studies on antimony trioxide.

In 1983, the AOIA was commissioned to conduct an inhalation study with rats. The peer reviewed study concluded that the exposure did not cause cancerous tumors in the lungs of rats. Over the years, the Association continued to submit studies and inform the US government on many health issues. 

In 2000, the International Antimony Oxide Industry Association (IAOIA) was formed by European and American (AOIA) antimony trioxide producers, and the Japanese Mining Industry Association (JMIA), to develop a scientific program and formal stakeholder communications on antimony trioxide.

In 2001, the US-based Antimony Oxide Industry Association (AOIA) ceased to exist and all relevant work was continued solely by the International Association, IAOIA.

A category for associate members was added to meet the demand for other stakeholders to become involved in the organization. These stakeholders, including producers of related products, distributors and consumers choose to actively participate in issues that relate to antimony trioxide.

With the major producers of antimony trioxide worldwide united, IAOIA had a strong voice to defend its product.  It was a very efficient body in the risk assessment of antimony trioxide under the EU Existing Substances Regulation, which was then replaced by the EU-REACH Regulation.

To meet the EU-REACH regulatory requirements, IAOIA broadened its scope to cover other antimony substances beyond antimony trioxide.  Since January 2008, the Association was registered as a Belgian non-profit industry Association (vzw or asbl), under the name of International Antimony Association (i2a).
International Antimony Association VZW
Avenue de Broqueville 12
BE-1150 Brussels
T : +32 2 762 30 93
F : +32 2 762 82 29
VAT : BE 0894.536.176
E :
Création site internet | IDcreation 2012 | Last updated: 24/06/2019
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