OSHA extends four Hazard Communication compliance dates
A U.S. OSHA amendment effective January 15, 2026 extended four Hazard Communication compliance dates by four months. The revised schedule runs from May 19, 2026 for substance suppliers to May 19, 2028 for employers using mixtures, with separate intervening deadlines.
The applicable date depends on whether the obligation concerns substances or mixtures and whether it applies to a supplier or employer.
- Legal status
- Final extension effective
- Source check
- Sep 17, 2026
- Topic
- Hazard communication / SDS
- Technical review
- Jiaxi · 2026-09-23
What changed
Previous requirement
January 19, 2026; July 20, 2026; July 19, 2027; January 19, 2028.
New requirement or current position
Substance suppliers May 19, 2026; substance employers November 20, 2026; mixture suppliers November 19, 2027; mixture employers May 19, 2028.
Who it affects
- Chemical suppliers
- Employers handling hazardous chemicals
Dates and milestones
Commencement and compliance dates can differ. Read the conditions beside each date, including any stay or local adoption requirement.
- Announcement or publication
- Jan 15, 2026
- Recorded effective date
- Jan 15, 2026
Manufacturers/importers/distributors evaluating substances
Employers: substance labels, program and additional hazard training as necessary
Manufacturers/importers/distributors evaluating mixtures
Employers: mixture labels, program and additional hazard training as necessary
What this could mean for your IH program
Advisory interpretation: Version compliance calendars and retain old dates as superseded. Transition compliance can use old, revised or both standards within applicable transition periods.
Confirm applicability with a qualified practitioner before changing your program.
Questions and qualifications
- This entry is based on the authoritative Federal Register text.
Source evidence
- Hazard Communication Standard: extension of compliance dates
OSHA / Federal Register · 91 FR 1695-1696; Summary, Dates and amended 1910.1200(j)
Effective January 15, 2026; shifts four deadlines to May 19, 2026, November 20, 2026, November 19, 2027 and May 19, 2028.
- Hazard Communication Standard final rule
OSHA / Federal Register · 89 FR 44144; Summary, Dates; IX State Plans
Published May 20, 2024, effective July 19, 2024; aligns primarily to GHS Revision 7 and changes classifications, labels, SDSs and trade-secret provisions. Section IX names 29 state plans.
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