OSHA’s Hazard Communication Update: 

What You Need to Know About the New 2026 Deadlines

If your business stores, handles, or uses hazardous chemicals, a major update to how you label and communicate those hazards is now underway — and the compliance deadline you may have heard about has recently changed. Here’s what’s happening, what it means for your workplace, and when you actually need to act.

Background: Why HazCom Is Changing:

The Hazard Communication Standard (HCS), found at 29 CFR 1910.1200, is the federal OSHA rule that governs how chemical hazards are classified, labeled, and communicated to workers. Most people know it by its everyday name: the “right-to-know” standard.

OSHA last overhauled the HCS in 2012, when it adopted the United Nations’ Globally Harmonized System of Classification and Labelling of Chemicals (GHS) — the international framework behind the familiar diamond-shaped hazard pictograms and standardized Safety Data Sheets (SDSs) used around the world.

The GHS itself keeps evolving. The UN updates it every two years, and the U.S. system had fallen several revisions behind. On May 20, 2024, OSHA published a final rule updating the HCS to align primarily with GHS Revision 7, along with select elements of Revision 8. That rule took legal effect on July 19, 2024, but — recognizing how much work is involved — OSHA built in a multi-year, phased compliance schedule rather than requiring immediate action.

Key Terms:

• GHS (Globally Harmonized System): The UN’s international framework for classifying chemical hazards and standardizing labels and SDSs so hazard information looks the same no matter where a chemical is manufactured or sold.
• SDS (Safety Data Sheet): A standardized 16-section document, provided by chemical manufacturers, that details a chemical’s hazards, safe handling procedures, and emergency response information.
• Hazard classification: The process of categorizing a chemical’s physical and health hazards (flammability, toxicity, corrosivity, etc.) according to defined criteria.
• Upstream vs. downstream: “Upstream” refers to chemical manufacturers, importers, and distributors — the parties that classify chemicals and produce labels/SDSs. “Downstream” refers to employers who purchase and use those chemicals in the workplace.

What’s Actually Changing:

The updated standard introduces several substantive changes to how chemicals are classified and communicated:

•  New aerosols hazard class – “chemicals under pressure” — covering liquids or solids pressurized with gas, separate from traditional compressed gas cylinders
• Expanded aerosols hazard class — now includes a new Category 3 for non-flammable aerosols
• New “desensitized explosives” hazard class — for explosive materials stabilized with a wetting or diluting agent
• Refined flammable gas categories — Category 1 is now split into 1A and 1B, with pyrophoric and chemically unstable gases classified as 1A
• Revised hazard and precautionary statement language updated to include the new and revised hazard classes and categories, and clarification around which hazards must be evaluated and which hazard information must appear on the label vs. the SDS
• Updated SDS and label content requirements, sections 2, 3, 9, and 11 of the SDS were updated, labelling flexibility was added for bulk shipments, containers released for shipments, and small packages, in addition to the use of prescribed concentration ranges for trade secret information.

For most downstream employers, the practical impact comes down to three things:

1. Updated container labels,
2. Updated SDSs, and
3. Updated training once your suppliers push the new information out.

Deadline Update:

OSHA extended the original compliance deadlines by four months.

The original 2024 rule set compliance dates beginning January 19, 2026. But on January 15, 2026, OSHA published a new final rule in the Federal Register pushing every deadline back by four months, citing the need for additional time to finalize compliance guidance for both regulated businesses and its own inspectors.

Revised compliance timeline:

In plain terms: Employers receive six additional months after their suppliers’ deadline to update labels, SDSs, and training—ensuring adequate time to receive updated labels and roll out corresponding training and program updates.

Additionally, OSHA did not eliminate the transition period. Employers may continue complying under the 2012 HCS, the new 2024 HCS, or a mix of both, until their specific compliance date arrives.

What This Means for You:

• The deadline moved, but the obligation didn’t disappear. Four extra months is relief, not a reprieve — treat this as more runway, not a green light to wait.
• Start with your chemical inventory. Identify which products in your workplace fall under the newly created or revised hazard classes (aerosols, chemicals under pressure, desensitized explosives, flammable gases).
• Talk to your suppliers now. Ask when they expect to issue updated SDSs and container labels — your compliance timeline depends on theirs.
• Revisit your written HazCom program. Classification procedures, workplace labeling systems, and training materials will all likely need updates once new hazard information arrives.
• Plan training timing carefully. Training too early — before new labels and SDSs actually arrive — risks becoming stale by the time employees need it.

A Note for Employers Across the Southeast

Not every state enforces workplace safety the same way, so it’s worth knowing which system applies to your business.

Some states — including Tennessee, Kentucky, North Carolina, South Carolina, and Virginia — operate their own OSHA-approved state plans. These state agencies (like Tennessee’s TOSHA, part of the Tennessee Department of Labor and Workforce Development) generally adopt federal standards, including the Hazard Communication Standard, and enforce the same compliance dates outlined above. State plans are also permitted to add requirements beyond the federal baseline — Tennessee, for example, maintains its own Hazardous Chemical Right-to-Know rule.

Other states in the region — including Alabama, Georgia, and Mississippi — do not operate a state plan and are instead regulated directly by federal OSHA. In these states, there’s no separate state agency layer; employers comply directly with the federal HCS and the deadlines described above, with inspections carried out by the relevant OSHA area office.

Either way, the underlying compliance dates come from federal OSHA and apply regardless of which enforcement structure covers your state. The practical difference is simply who inspects your workplace and whether any additional state-specific requirements apply on top of the federal rule. If you operate across multiple states, it’s worth confirming the enforcement structure — and any state-specific add-ons — for each location.

Sources & Further Reading:

• OSHA, Hazard Communication Standard Final Rule (rulemaking hub): osha.gov/hazcom/rulemaking
• OSHA, Final Rule Fact Sheet (OSHA 4437): osha.gov/sites/default/files/publications/OSHA4437.pdf
• Federal Register, “Hazard Communication Standard” — deadline extension final rule, published Jan. 15, 2026: federalregister.gov/documents/2026/01/15/2026-00653/hazard-communication-standard
• OSHA QuickTakes, January 15, 2026 announcement: osha.gov/quicktakes/01152026
• OSHA, State Plans overview (full list of state-plan and federal-jurisdiction states): https://www.osha.gov/stateplans
• Tennessee Department of Labor & Workforce Development, TOSHA: https://www.tn.gov/workforce/employees/safety-health/tosha.html
• OSHA, Alabama contact/area office information (federal OSHA jurisdiction): https://www.osha.gov/contactus/bystate/AL

This article is provided for general informational purposes and does not constitute legal advice. Employers should consult the full text of 29 CFR 1910.1200 and applicable TOSHA rules, or contact a qualified compliance professional, to determine specific obligations for their workplace.