What Is the November 20, 2026 HazCom Deadline? (Employer Checklist)

The date by which employers must update workplace labels, the written HazCom program and employee training for chemical substances under OSHA’s 2024 GHS update. What it covers, what it does not, and a four-item checklist.

November 20, 2026 is the date by which employers must comply with OSHA’s 2024 Hazard Communication update for chemical substances: updated workplace labels where you make your own, a revised written HazCom program where needed, and employee training on any newly identified hazards shown on the updated labels and Safety Data Sheets. The parallel deadline for mixtures is May 19, 2028. The rule itself took effect July 19, 2024; these are the last of its staggered compliance dates after OSHA’s four-month extension in January 2026.

Who the Deadline Applies To

Every employer covered by 29 CFR 1910.1200, which is any workplace where employees may be exposed to hazardous chemicals, with no size or quantity threshold. Manufacturers and importers had an earlier date (May 19, 2026 for substances) to ship updated labels and SDSs; the employer deadline follows so you have time to receive them and act.

What Changed in the 2024 Update

New and revised hazard classes and categories, including changes to flammable gases and aerosols.
Revised hazard and precautionary statements on labels and SDSs.
Rules for small-container labeling and for when a shipped product’s label must be updated.
Clarified classification for hazards under normal conditions of use and foreseeable emergencies.

The 16-section SDS format and the pictograms did not change.

The Employer Checklist

SDSs: file the updated sheets your suppliers have sent since 2024 and make sure employees can reach them during every shift.
Workplace labels: if you make in-house labels (transfer containers, secondary containers), update the hazard information to match the new SDSs.
Written program: revise the chemical inventory and any section that describes labels or hazards that changed.
Training: train employees on any hazard that is new to them on the updated labels and SDSs, and record the date. If your workforce has turned over since the last HazCom training, a full session is the simplest way to cover it.

What the Deadline Does Not Require

It does not require annual HazCom training, a new chemical inventory from scratch, or replacing products. If a product’s updated SDS shows the same hazards you already trained on, no retraining is required for it. The deadline is about changes, and for many small shops the honest answer after reviewing the new SDSs is “two products changed, train on those.”

Penalties

Hazard Communication is consistently a top-three cited OSHA standard, and training (1910.1200(h)) is one of its most-cited paragraphs. A serious violation currently carries a maximum penalty above $16,000 per item. Training a ten-person crew online costs about $200.

Preview chapter 1 of the HazCom course free

Frequently asked questions

What has to be done by November 20, 2026?

Workplace labels updated where you make your own, the written HazCom program revised as needed, and employees trained on any newly identified hazards on updated labels and SDSs, for chemical substances.

Does the deadline apply to small businesses?

Yes. 29 CFR 1910.1200 has no size or quantity threshold; any workplace with employee exposure to hazardous chemicals is covered.

Is there a later deadline for mixtures?

Yes, May 19, 2028 for employers; manufacturers must ship updated mixture labels and SDSs by November 19, 2027.

Sources: Federal Register, May 20, 2024, Hazard Communication Standard final rule; OSHA 29 CFR 1910.1200, Hazard Communication; OSHA, Top 10 most frequently cited standards; OSHA penalties (current maximums)

HazCom/GHS Safety Certification, updated for the 2024 rule: train the crew before November 20, 2026, $24 a seat until then.