Classification

GHS Revision 7 Converter: Every Hazard-Class Change in HCS 2024

HCS 2024 moves US labels from GHS Rev 3 to primarily GHS Rev 7. This is the complete old-to-new crosswalk: two new physical-hazard classes, the Flammable Gas 1A/1B split, the Aerosols overhaul, and exactly what to relabel before November 20, 2026.