Phosphine workplace exposure limit Australia

Phosphine Regulations in Australia: New Workplace Exposure Limit Set for December 2026

New Workplace Exposure Limit Effective from 1 December 2026 

Safe Work Australia (SWA) will replace the current Workplace Exposure Standard (WES) for phosphine with a lower Workplace Exposure Limit (WEL) on December 1, 2026. Some states have stated that they may postpone implementation beyond this deadline. Employers must take reasonable steps to protect workers from phosphine exposure in accordance with applicable work health and safety (WHS) regulations. 

33 APVMA-Approved Products Contain Phosphine 

The Australian Pesticides and Veterinary Medicines Authority (APVMA) now approves 33 products that contain phosphine, including those using Aluminium phosphide or Magnesium phosphide. Their certified labels provide 0.3 ppm in the ventilation-period guidelines for clearing fumigated enclosures or work areas. 

Clarification: Product Clearance Level vs. Workplace Exposure Limit 

The APVMA and SWA have clarified that the 0.3 ppm reference on product labels has a different purpose than the WEL. The label value refers to the clearance after fumigation, whereas the WEL is a health-based limit intended to measure and regulate phosphine concentrations in worker’s breathing zones. 

No Immediate Changes to Product Labels 

Following their review, the APVMA and SWA do not currently consider changes to the instructions for use on phosphine product labels that would facilitate compliance with WHS responsibilities. 

As a result, the APVMA will not change phosphine product labels at this time. It may, however, take proportional regulatory action if new information suggests that label revisions are necessary to address possible concerns.

About the author: Auxilife Team