HCS 2024 / GHS Rev 7 Toolbox
Make the transition to HCS 2024: map old classes to Rev 7, look up the deadlines, plan re-labeling, and classify flammable liquids under the new criteria.
What this covers
OSHA's 2024 update to the Hazard Communication Standard aligns it with the seventh revision of the GHS (with elements of Rev 8), changing classification criteria, label provisions (including 'released for shipment' labeling), and SDS content. Compliance dates phase in over staggered deadlines for substances, mixtures, and downstream employers. This pack maps old to new, looks up the date that applies to you, plans re-labeling, and reclassifies flammable liquids.
Use these tools in order
Each tool is free—no login. Work top to bottom for a complete result.
- 1
GHS Rev 7 Transition Wizard
Map HCS 2012 / GHS Rev.3 classes to HCS 2024 / GHS Rev.7.
- 2
hcs-2024-deadline-lookup
Get your single in-force HazCom 2024 deadline by role and product type, with a live countdown and the 1910.1200(j) cite.
- 3
hcs-2024-relabel-action-planner
Build a per-product re-label and SDS action plan for the HCS 2024 deadlines (substances vs mixtures).
- 4
flammable-liquid-category-classifier
Classify a flammable liquid’s GHS category (1–4) from flash point and boiling point, with signal word and pictogram.
Frequently asked questions
What changed in HCS 2024?
Alignment with GHS Revision 7: updated classification criteria, new and revised hazard categories (such as aerosols and desensitized explosives), 'released for shipment' label provisions, and updated label and SDS requirements.
When do I have to comply?
The rule phases in over staggered compliance dates that differ for chemical manufacturers/importers versus distributors, and for substances versus mixtures, running through 2026–2027. Use the deadline lookup tool to get the specific date that applies to your situation rather than relying on a single date.
Do existing labels have to be redone immediately?
Not all at once — there are transition windows, but updated classifications must flow into new labels and SDSs by the applicable date, and downstream employers must update workplace labels and retrain on new hazards once those changes reach them.
Planning aids only — not legal advice. Confirm every determination against the current OSHA standard and your State-Plan's rules.
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