Writing / Manufacturing
The HazCom deadline for employers is November 20. Here is what actually has to change.
OSHA's updated Hazard Communication Standard reaches employers on November 20, 2026, for chemical substances. Most of the work is comparing what your suppliers sent against what your plant still uses. Here is what the rule asks for, and how to get through it.
A drum of solvent arrives with a new safety data sheet. The supplier reclassified the product this year, so the hazard statements have changed. The sheet goes in the binder. The secondary containers on the line still carry the old in-house label, the written program still describes last year’s list, and nobody has told the crew what is different.
That gap is what OSHA’s next hazard communication deadline is about.
The dates
OSHA updated its Hazard Communication Standard, 29 CFR 1910.1200, in May 2024, then pushed every compliance date back four months in January 2026. The dates now run in two steps: suppliers first, then employers.
| Who | Substances | Mixtures |
|---|---|---|
| Chemical manufacturers, importers and distributors | May 19, 2026 | November 19, 2027 |
| All employers | November 20, 2026 | May 19, 2028 |
Until those dates, the rule lets you comply with the 2012 version, the 2024 version or both. For substances, that option ends for employers on November 20.
What employers have to do
The rule names three things, each “as necessary”. If a chemical’s classification did not change, there may be nothing to update for it. You still need to know that, which means checking.
- Workplace labels. Update any alternative labeling you use in the plant under paragraph (f)(6): in-house labels, signs, placards and process sheets. Rating systems such as HMIS or NFPA need to show current hazard information too.
- The hazard communication program. Update the program under paragraph (h)(1) so it matches the chemicals and hazards you have now.
- Training. Give employees additional information and training on newly identified physical, health or other hazards.
The November date covers substances. Products that are mixtures, which is much of what most plants buy, follow on May 19, 2028. Most sites will have both kinds on the same shelf, so it pays to sort your inventory once and track each product against its own date.
States with their own OSHA plans can set different dates, so check yours if you are in one.
Why this is harder than it sounds
None of these tasks is difficult. The difficulty is volume and comparison.
The real work is comparing every sheet you hold against the sheet your supplier issued this year.
A mid-size plant can have hundreds of products from dozens of suppliers. Updated sheets arrive by email, in the box, or not at all. Each one has to be matched to a line in your inventory, and compared with the old version to see whether a classification, hazard statement or pictogram really changed. Most of the time nothing important did, which is exactly why the few that matter get missed.
Hazard communication was also the most-cited OSHA standard for general industry in the preliminary numbers for fiscal 2026, so it is worth getting the paperwork right.
What to do in the time you have
If you have not started, work in this order:
- List what is on site. Walk the floor as well as the storeroom, and sort each product as a substance or a mixture.
- Chase the missing sheets. Suppliers of substances were due to update by May 19, 2026. Ask for the current sheet for anything you cannot find.
- Compare old and new. Flag the products where a classification, hazard statement or pictogram changed. This short list drives everything else.
- Fix the labels. Change the in-house labels and process sheets for the flagged products, and check that sheets can be reached on every shift.
- Update the program. Update the chemical list and any practices that have changed. It should describe what your plant really does.
- Train and record it. Cover the new hazards with the people who work with those chemicals. The rule does not prescribe a training record for this, but a date, the content and an attendance list are your best proof.
Where AI helps
The comparison in step 3 is well suited to language models, with a person making the call. A model can read each incoming sheet, match it to your inventory, and show what changed since the last version. It can then draft the label and program updates for your safety lead to review. It reduces the reading, not the responsibility: your competent person still decides what a change means for your plant and approves every update.
The same setup also covers the mixtures deadline in 2028, when the bigger share of the shelf comes due. New sheets from suppliers keep arriving after that as well, so the comparison keeps paying off.
If you would like to go through what this would look like at your site, book a 30-minute call or email info@coreshiftai.io.
Sources: 29 CFR 1910.1200(j), as amended at 91 FR 1695 (January 15, 2026); OSHA Directive CPL 02-02-079; J.J. Keller analysis of OSHA’s preliminary fiscal 2026 data. This article is general information, not legal advice. Confirm the dates that apply to your site, especially in state-plan states.