OSHA HazCom: employer updates for substances due Nov 20

Under OSHA's updated Hazard Communication Standard, employers have until November 20, 2026 to update, as needed, in-house labels, the written program and

RJ Ryan Joyce 2 min read

Compliance Watch · Issue 04

Status: Action before Nov 20

Jurisdiction: Federal · Topic: Workplace safety

Source: Federal Register, January 15, 2026

Back to the issue: all 7 updates in Issue 04

What changed

Under OSHA’s updated Hazard Communication Standard, employers have until November 20, 2026 to update, as needed, in-house labels, the written program and training for newly identified hazards in chemical substances. That date includes OSHA’s January 2026 four-month extension. The same duties for mixtures are due May 19, 2028.

Who this affects

Employers covered by OSHA’s Hazard Communication Standard: those whose employees may be exposed to hazardous chemicals at work, under normal conditions or in a foreseeable emergency.

Exceptions that matter:

  • Mixtures follow later: the same employer updates for mixtures are due May 19, 2028.
  • Chemical manufacturers, importers and distributors had their own earlier date for substances (May 19, 2026) and have until November 19, 2027 for mixtures.

What to do

If employees work with hazardous chemicals, get updated safety data sheets from suppliers, then update your written program, any in-house labels and training for the new hazards.

Employer checklist

1
Collect updated safety data sheets from each supplier.
2
Compare them with your in-house labels and update any that changed.
3
Update the written program and give employees any added training on newly identified hazards before November 20, 2026.

Primary source: Federal Register, January 15, 2026. Part of Compliance Watch, Issue 04 (November 2, 2026). Last reviewed November 2, 2026.

Questions employers ask

When does this take effect?
November 20, 2026 is the deadline to update in-house labels, the written Hazard Communication program and training for newly identified hazards in chemical substances. It is a date for employer action under a rule that already exists, not the date a new rule takes effect. The official notice: Federal Register, January 15, 2026.
Where is the official source?
The primary source is Federal Register, January 15, 2026. VertiSource HR links the government page rather than a summary of it.

Questions about this update?

Every “What to do” line above is a task for someone at your company. Our clients hand the payroll and tax pieces to us and get an HR advisor for the rest.

Ask us about a federal rule All 7 updates in Issue 04

General information from VertiSource HR, not legal or tax advice. How a rule applies depends on your company and your state. Check with us or your attorney before acting.

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