Antimony Trioxide Regulatory Policy Update

CAS Number: 1309-64-4 | Molecular Formula: Sb₂O₃

Key Regulatory Status Worldwide

Antimony Trioxide (ATO) remains subject to global regulatory frameworks to ensure safe handling and environmental protection. Here’s the latest policy overview for industry stakeholders:

*EU RoHS Directive (2011/65/EU):

ATO is not restricted for use in electrical and electronic equipment (EEE) following the 2019 EU Commission review by Oeko Institut and Fraunhofer. The review confirmed that ATO meets fire safety requirements without triggering RoHS restriction criteria, including waste management impacts and substitution feasibility. It remains on the EU’s watchlist for future reviews post-2022 Directive updates.

*US EPA Regulations:

Classified as a Hazardous Air Pollutant (HAP) under the Clean Air Act. ATO is tracked in multiple EPA systems (e.g., CERCLA, TSCA Inventory) with specific reporting requirements for emissions. The EPA’s Integrated Risk Information System (IRIS) sets a non-cancer inhalation reference concentration of 0.0002 mg/m³.

*Global Compliance Limits:

For electronic materials, RoHS mandates a maximum concentration limit of 1000 ppm. In plastic products, international standards typically restrict antimony residues to ≤10 ppm. Drinking water testing follows ISO 11885 and GB/T 5750.6-2006 (China) for traceability.

Workplace & Environmental Safety

Occupational exposure is regulated by ACGIH with a TLV-TWA of 0.5 mg/m³ (2008 standard). U.S. states like Washington enforce ambient air quality standards, including a 24-hour limit of 0.2 μg/m³ (WAC 173-460). Responsible sourcing and updated Safety Data Sheets (SDS) are mandatory for all ATO applications.

Note: Regulatory frameworks are subject to periodic reviews. We recommend subscribing to our updates for real-time policy changes affecting your operations.

For customized compliance support or regional policy details, contact our regulatory affairs team at zhou@sinobiochemistry.com