Last Updated: April 14, 2026
OSHA's HazCom 2024 update — aligning with GHS Revision 7 — sets new compliance deadlines that every contractor and facility manager needs to calendar now. Chemical manufacturers and importers must update labels and Safety Data Sheets (SDSs) by May 1, 2026. Distributors have until November 1, 2026. Employers must update workplace labeling and retrain workers by January 1, 2028.
The May 2026 deadline is six weeks away. If your facility stores or uses hazardous chemicals — solvents, adhesives, refrigerants, compressed gases — your GHS labels and SDSs may need to be updated before then. OSHA's 2024 HazCom final rule adds new hazard classes, revises existing classifications, and introduces updated label requirements that affect manufacturers, distributors, and employers on different timelines. This guide breaks down exactly who must do what, when, and how to stay compliant before inspectors arrive.
What Did OSHA Change in the 2024 HazCom Update?
OSHA's 2024 update to 29 CFR 1910.1200 aligns the US Hazard Communication Standard with GHS Revision 7 — the seventh edition of the United Nations' Globally Harmonized System of Classification and Labelling of Chemicals. The existing HazCom standard was based on GHS Rev. 3, which was adopted in 2012.
The biggest change is new hazard classes. GHS Rev. 7 adds hazard categories that didn't exist in the original US HazCom standard:
- Flammable gases — now subdivided into Category 1A, 1B, and 2. Pyrophoric gases (spontaneously flammable) and chemically unstable gases now have their own sub-classifications.
- Aerosols — expanded to three categories. Flammable aerosols (Category 1 and 2) remain; Category 3 is new for aerosols with flash points in the 23–93°C range.
- Chemicals under pressure — new hazard class covering dissolved gases, compressed liquefied gases, and refrigerated liquefied gases that don't fit the compressed gas category.
- Desensitized explosives — new category covering explosive materials that are wetted or dissolved to suppress their explosive properties.
- Halogentaed solvents — new carcinogenicity and reproductive toxicity classifications for certain chlorinated and brominated solvents (e.g., methylene chloride, 1-bromopropane).
Existing hazard classes were also revised — particularly for skin sensitization (added Category 1A/1B subcategories) and reproductive toxicity (added Category 1C for lactation effects).
What Are the New OSHA HazCom Compliance Deadlines?
The OSHA HazCom deadline extension 2026 applies differently depending on your role in the supply chain. Here's the full compliance timeline:
| Who | Deadline | What Must Be Done |
|---|---|---|
| Chemical manufacturers & importers | May 1, 2026 | Update all SDSs and labels to GHS Rev. 7 format; reclassify products under new hazard classes |
| Distributors | November 1, 2026 | May not ship products bearing old-format labels or SDSs after this date |
| Employers | January 1, 2028 | Update workplace labels, Hazard Communication Programs, and employee training |
Key detail: The May 2026 deadline for manufacturers does NOT automatically require employers to pull and replace all existing chemical labels by that date. Employers have until January 1, 2028 to bring workplace labeling and training into compliance — but any new product received after November 1, 2026 must already carry the updated label format.
For facilities that source chemicals from manufacturers who update early, you may start receiving updated labels before the employer deadline. Train your workers on what the new format looks like before those shipments arrive.
What New Hazard Classes Mean for Your Labels
If you manufacture, import, or repackage any chemical that falls into a new hazard class, your labels must add the corresponding GHS pictogram, signal word, and hazard statements.
Flammable gases (new subdivisions): Pyrophoric gas labels must now include the flame pictogram with "DANGER" and the specific statement "Catches fire spontaneously if exposed to air." Previously, many labels used more generic flammable gas language. The subdivision now requires specificity.
Chemicals under pressure: Products in this category require the gas cylinder pictogram and new precautionary statements about pressure release hazards. This affects many aerosol-adjacent products and compressed refrigerant containers.
Halogentaed solvents: Products containing methylene chloride, 1-bromopropane, or other newly classified carcinogenic halogenated solvents must now include the health hazard pictogram (exclamation mark in diamond) and GHS carcinogenicity Category 1B language. This is a significant change for facilities using these solvents for cleaning, degreasing, or adhesive work.
Practical takeaway: Pull your current SDS binder and cross-reference every product containing flammable gases, aerosols, or halogenated solvents against the new classifications. Manufacturers are required to update these SDSs by May 1 — if your supplier hasn't sent updated documentation, request it now.
Do You Need to Replace All Your Chemical Labels by May 2026?
If you're an employer (not a manufacturer or distributor), you do NOT need to replace all chemical labels by May 1, 2026. The employer compliance deadline is January 1, 2028. However, there are situations where you should act sooner:
- New purchases after November 2026: Any product ordered after November 1, 2026 must come with GHS Rev. 7-compliant labels. If you apply your own workplace labels over incoming containers, your labels must match the updated SDSs.
- Secondary containers: Portable containers that you fill and label in-house must always reflect the current SDS. As SDSs update to GHS Rev. 7, your secondary container labels need to match.
- OSHA inspections now: OSHA inspectors enforcing 1910.1200 in 2026 are aware of the transition. If your labels are significantly inconsistent with an updated SDS, that creates a documentation gap. Keeping labels and SDSs aligned is always the safest position.
Here's a scenario Print Pro AZ sees regularly: An electrical contractor keeps a parts room stocked with adhesives, solvents, and lubricants. The supplier updates the SDS for a contact cement in early 2026 — it now includes a carcinogenicity classification. The workplace label still says "Caution: Flammable" with no health hazard pictogram. That mismatch is a recordable OSHA citation waiting to happen. The fix: reprint that label from your updated SDS data before the old one causes a problem.
What Changes in the Updated Safety Data Sheet Format?
GHS Rev. 7 introduces revisions to SDS content — not the 16-section structure itself, but the information within key sections.
Section 2 (Hazard Identification) sees the most changes. Products reclassified under new hazard categories must list updated GHS hazard class names, new hazard categories, revised H-codes (hazard statements), and revised P-codes (precautionary statements).
Section 9 (Physical and Chemical Properties) expands the required information list. Several properties that were optional under GHS Rev. 3 are now required fields, including particle characteristics for solid materials, specific gravity for liquids, and decomposition temperature for unstable substances.
Section 14 (Transport Information) may also change for products newly classified as chemicals under pressure or desensitized explosives — these have specific DOT transport category implications.
Practical takeaway: If you receive an updated SDS from a supplier, compare it to your current version. Any change in Section 2 signals a label change. Flag those products for label review immediately rather than waiting for an inspection to catch the gap.
How to Audit Your Chemical Labels Before the Deadline
A systematic label audit before May 2026 protects your facility and keeps your OSHA compliance program current. Here's how to approach it:
- Inventory all hazardous chemicals on your job site or in your facility. Include products in storage, secondary containers, and portable containers filled from bulk.
- Pull the current SDS for each product. Note the version date. If your SDS is older than 2024, request an updated version from the supplier — they should already have GHS Rev. 7 updates in progress.
- Compare Section 2 of the updated SDS against your current container label. Look for new pictograms, changed signal words, or added hazard statements.
- Flag products with new hazard classifications — particularly any containing halogenated solvents, compressed gases, aerosols, or flammable gas mixtures.
- Reorder updated labels for any flagged products. Custom-printed GHS chemical labels ensure your pictograms, signal words, and statements match the updated SDS exactly.
- Document the audit. An OSHA inspector will ask for your written Hazard Communication Program. A dated audit log showing you proactively updated labels is your best protection.
Print Pro AZ produces custom GHS chemical labels and industrial warning labels printed on durable polyester substrates that resist solvents, UV, and temperature cycling — exactly what OSHA requires for labels that stay legible throughout the container's life.
Frequently Asked Questions
What is the OSHA HazCom 2026 deadline, and who does it apply to?
The May 1, 2026 deadline applies to chemical manufacturers and importers — they must have updated SDSs and labels in GHS Revision 7 format by that date. Distributors must stop shipping products with old-format labels by November 1, 2026. Employers have until January 1, 2028 to update workplace labeling and retrain workers, but any product received after November 2026 must already carry the updated label format.
Do I need to replace my existing chemical labels before the May 2026 deadline?
Not necessarily — if you are an employer (not a manufacturer or distributor), your workplace label replacement deadline is January 1, 2028. However, as suppliers update SDSs and ship new-format labels, your workplace labels should stay consistent with your current SDSs. Mismatches between your SDS and container label are a citation risk regardless of the transition timeline.
What new hazard classes does the HazCom 2024 update add?
The update adds five new hazard classes: flammable gases (with Subdivisions 1A/1B for pyrophoric and chemically unstable gases), aerosols (expanded to three categories), chemicals under pressure, desensitized explosives, and updated carcinogenicity/reproductive toxicity classifications for halogenated solvents. Products that fall into these new classes need updated labels and SDSs.
What happens if a supplier doesn't update their labels by May 2026?
After May 1, 2026, manufacturers and importers shipping products with old-format GHS labels are in violation of 29 CFR 1910.1200. After November 1, 2026, distributors cannot ship those products either. As an employer, receiving a shipment with non-compliant labels after the distribution deadline puts both you and your supplier at risk. Document the discrepancy, request updated labels from the supplier, and apply a compliant workplace label while you wait.
Is my current SDS binder still valid during the transition period?
Yes — you are not required to immediately replace every SDS in your binder. However, as suppliers send updated SDSs, you must incorporate them into your HazCom program. Maintaining both old and new versions creates confusion. The practical approach: swap in updated SDSs as you receive them and flag which products have changed so you can update labels accordingly.
Conclusion: Get Your Labels Updated Before May 2026
The OSHA HazCom deadline extension 2026 is a phased transition — not an overnight overhaul. But with the manufacturer deadline six weeks out, the window to request updated SDSs, audit your inventory, and order replacement labels is closing fast. The three things to do this week: pull your SDS binder, identify any products affected by the new hazard classes, and contact your label supplier about updated GHS-compliant formats.
For deeper background on GHS chemical labeling rules, see our complete guide to chemical hazard labels and HazCom requirements.
Print Pro AZ produces durable, inspection-ready chemical hazard labels built to OSHA specifications — custom-printed to match your updated SDSs. For commercial facilities with large inventories, we can work from your product list directly.
Order custom GHS chemical labels → | Send us your label specs for a commercial quote →
Questions? Call Brent directly: (602) 649-5305
Brent Hanke | Print Pro AZ | (602) 649-5305 | b.hanke@printproaz.com Brent Hanke is the founder of Print Pro AZ, supplying NEC-compliant labels to contractors across the country.