OSHA Implements New Aerosol Classification under GHS Version 7

Overview of OSHA’s Updated Regulations

The Occupational Safety and Health Administration (OSHA) has recently updated its chemical regulations to align with version 7 of the Globally Harmonized System (GHS). This update brings OSHA’s standards in line with international regulations, particularly those of Canada and Europe. The revision introduces several changes, including adjustments to small packaging rules, trade secret management, updated and new classifications, and notably, a new approach to aerosol classification.

Changes in Aerosol Classification: Hazcom 2012 vs. Hazcom 2024

Previous Classification (Hazcom 2012)

Under the old Hazcom 2012 regulations, flammable aerosols were classified under “Gases under pressure,” in alignment with version 3 of GHS. This classification used the Gas Cylinder pictogram to indicate the potential hazards.

New Classification (Hazcom 2024)

The updated Hazcom 2024 regulations, reflecting GHS version 7, introduce a significant shift in aerosol classification. The new classification system includes a Category 3 for aerosols, labeled as “Pressurized container; may burst if heated,” which does not use a pictogram. This change addresses the limitations of the previous system by recognizing aerosols that, while not flammable, can still pose risks due to pressure.

Implications for Safety Data Sheets and Labels

The new classification system requires a re-evaluation of how aerosols are classified on safety data sheets (SDS) and labels. Previously, aerosols were solely classified under “Gas under pressure” with the corresponding pictogram. Now, aerosols may fall under the “Pressurized container; may burst if heated” category if they contain no flammable components, reflecting a broader range of potential hazards.

Transition Period for Compliance

To facilitate a smooth transition, OSHA has established deadlines for manufacturers to update their products’ labeling and SDSs:

1. For Manufacturers of Substances: Updates must be completed by January 19, 2026.
2. For Manufacturers of Mixtures: The deadline for similar updates is January 19, 2027.

Impact and Effectiveness

These changes are expected to improve hazard communication by offering more specific classifications and better reflecting the potential risks associated with different aerosol products. This enhancement allows consumers and industries to have a clearer understanding of the hazards related to aerosol products, focusing on both the chemical nature and the form of the product.

Conclusion

The shift to GHS version 7 and the updated aerosol classifications mark a significant advancement in chemical safety and hazard communication. As industries and manufacturers adapt to these new regulations, the clarity and effectiveness of hazard communication are anticipated to improve, ultimately enhancing safety across various sectors.