OSHA rules
HazCom 2024: new compliance dates
OSHA's 2024 update aligns the Hazard Communication Standard with GHS Revision 7. It took effect July 19, 2024. In January 2026 OSHA moved every compliance date back four months: May 19, 2026 for substances and November 19, 2027 for mixtures.
On your exam?
Not yet: the exam still tests the prior rule
BCSP's references predate the 2024 update. The core the exam tests (six label elements, pictograms, the 16-section SDS) didn't change; the new details aren't tested yet.
Judged against ASP11, CSP11 and CHST5, the outlines in effect on October 16, 2026.
- Status
- In effect. Phased compliance runs to May 19, 2028
- Effective
- July 19, 2024
- From
- OSHA
- Last checked
- October 16, 2026
Key dates
- May 20, 2024Final rule published
- July 19, 2024Rule takes effect; transition period begins
- January 15, 2026OSHA extends every compliance date by four months
- May 19, 2026Manufacturers, importers and distributors: substances
- November 20, 2026Employers: workplace labels, written program and training for substances
- November 19, 2027Manufacturers, importers and distributors: mixtures
- May 19, 2028Employers: workplace labels, written program and training for mixtures
What changed
OSHA's summary of the final rule lists:
- Revised criteria for classifying certain health and physical hazards
- Revised provisions for updating labels
- New labeling provisions for small containers
- New provisions on trade secrets
- Technical amendments to safety data sheet contents
- Related changes to definitions
Until each compliance date, OSHA says manufacturers, importers, distributors and employers may follow the 2012 standard, the 2024 standard, or both.
For the exam
Study the structure that has been stable since 2012: hazard classification, the six required label elements, pictograms, the 16-section SDS, and employee training. Those are what our hazard communication questions cite from 29 CFR 1910.1200.
Practice what's tested now
- ASP: Hazard Communication and GHS practice questions
- CHST: Hazard Communication and GHS practice questions
- CHST: Hazard Communication Training and SDS Access practice questions
- CSP: Hazard Classification and Toxicology (GHS) practice questions
- CSP: Trade Secrets and Safety Data Sheets practice questions
- 29 CFR 1910.1200: how it's tested 68 practice questions cite this section
Sources
- Federal Register: Hazard Communication Standard, final rule (May 20, 2024)
- Federal Register: Hazard Communication Standard, compliance dates extended (Jan 15, 2026)
- OSHA: HCS 2024 compliance date extension notice
- OSHA: final rule to amend the Hazard Communication Standard
Published October 16, 2026. Last checked against these sources October 16, 2026. Something out of date? Email hello@passcited.com.