HazCom compliance deadlines are now in motion following OSHA’s 2024 update to the Hazard Communication Standard (HCS). The update primarily aligns the standard with Revision 7 of the United Nations’ Globally Harmonized System of Classification and Labelling of Chemicals (GHS) and includes changes affecting hazard classifications, labels, and Safety Data Sheets (SDSs).
The transition is happening in phases across the supply chain:
- May 19, 2026: Chemical manufacturers, importers, and distributors evaluating substances were required to comply with the modified HCS provisions.
- November 20, 2026: Employers must, as necessary, update alternative workplace labeling and their hazard communication programs and provide additional employee training for newly identified hazards associated with substances.
- November 19, 2027: Chemical manufacturers, importers, and distributors evaluating mixtures must comply with the modified provisions.
- May 19, 2028: Employers must complete any necessary workplace labeling, hazard communication program, and additional training updates associated with mixtures.
For EHS teams, that means HazCom compliance is not a single transition date. Updated hazard information will continue moving through the supply chain as manufacturers, importers, and distributors complete their respective requirements.
As organizations navigate that transition, practical questions are emerging around which SDSs may change, when teams need to act, and how to manage a potentially significant volume of updates. Here are some of the questions EHS leaders should be considering now.
Do we need to update all SDSs immediately for HazCom 2026?
No. OSHA established separate compliance periods for substances and mixtures, and the responsibilities and deadlines differ for chemical manufacturers, importers, distributors, and employers.
The first major milestone has already passed. As of May 19, 2026, manufacturers, importers, and distributors evaluating substances must comply with the modified HCS provisions. Mixtures follow in November 2027.
For employers, the immediate priority is understanding what new information is coming downstream and determining whether changes require corresponding updates to workplace labels, the written hazard communication program, or employee training. The employer compliance deadline for those necessary substance-related changes is November 20, 2026.
This makes HazCom implementation a rolling process rather than a one-time SDS project.
If an SDS was recently validated, could it still need attention?
Yes. The date an organization last reviewed or validated an SDS does not necessarily tell you whether a newer version has subsequently become available.
For example, an SDS reviewed earlier in 2026 could still be revised by its manufacturer later as the HazCom requirements take effect. A recent review date alone therefore does not tell an EHS team whether it has the latest manufacturer-issued SDS.
Under OSHA’s HCS, when a manufacturer or importer becomes newly aware of significant information regarding a chemical’s hazards or ways to protect against those hazards, that information generally must be added to the SDS within three months. Manufacturers and importers must provide an appropriate SDS with the initial shipment and with the first shipment after an SDS is updated. Distributors have similar responsibilities for transmitting updated information.
That matters during the current HazCom transition because organizations may receive revised SDSs for chemicals whose existing documents were reviewed relatively recently.
Many companies use their own periodic review or validation practices to manage SDS libraries. During a regulatory transition, relying exclusively on an internally established review interval can make it harder to identify changes occurring between scheduled reviews.
How should we prioritize SDSs during the HazCom transition?
Start by understanding where changes are most likely to affect your organization and where updated hazard information could have the greatest operational impact.
Consider prioritizing:
- Substances before mixtures based on OSHA’s phased compliance timeline
- SDSs for which manufacturers or suppliers have issued revised information
- Chemicals used broadly across facilities or operations
- Chemicals with significant health or physical hazards
- SDS populations that would be difficult to review manually at scale
The objective is not simply to review every document again. It is to create visibility into where updated information is entering your chemical inventory and determine what action that information requires.
What should employers do when they receive an updated SDS?
Receiving the revised document is only part of the process. EHS teams should evaluate what changed and determine whether the new hazard information has implications elsewhere in the workplace.
Depending on the revision, teams may need to determine whether corresponding changes are necessary to alternative workplace labels, the written hazard communication program, or employee training.
During a phased regulatory transition, establishing a consistent process for reviewing revised SDSs and carrying relevant changes through to workplace programs can help prevent the document-management process from becoming disconnected from the broader HazCom program.
Should we change our SDS management process?
Not necessarily. Organizations should first determine whether their existing SDS management processes can adequately support a multi-year transition involving potentially significant volumes of revised information.
For some EHS teams, that may mean maintaining their established SDS management program while adding targeted review efforts tied to the HazCom transition.
Areas to evaluate include:
- How revised supplier SDSs are identified and captured
- How SDS revisions are tracked
- How changes affecting workplace labels, programs, or training are identified
- Whether large SDS populations can be searched or reviewed efficiently
- How updated information is distributed across sites
The goal is to make the existing program responsive enough to manage regulatory-driven changes alongside normal SDS maintenance.
That approach also closely reflects the concern that originally surfaced internally at Benchmark: a recently loaded SDS could subsequently be revised because of HazCom changes, even though its normal maintenance window might not otherwise prompt another review for some time.
How can we realistically keep up with the volume of SDS updates?
Scale is one of the practical challenges of the HazCom transition, particularly for organizations maintaining hundreds or thousands of SDSs across multiple facilities.
OSHA requires manufacturers and importers to provide an appropriate SDS with the initial shipment and with the first shipment after an SDS is updated. Distributors also have requirements for transmitting SDSs and updated information. Employers, meanwhile, must maintain the required SDSs for hazardous chemicals in the workplace and ensure they are readily accessible to employees.
The operational challenge is making sure those updates are identified, evaluated, and incorporated consistently across a large organization.
Digital SDS management can help teams centralize that work by supporting capabilities such as:
- Tracking SDS revisions
- Searching large chemical inventories
- Identifying documents requiring review
- Maintaining current SDS information across facilities
- Providing employees access to required SDS information
Where does AI actually help with SDS compliance?
AI helps by taking on some of the high-volume search and review work that can slow EHS teams down. Advanced capabilities like those available through the Genny AI Agent Hub can quickly scan large SDS libraries and flag documents that may need attention, making it easier to stay current without adding more manual work.
Instead of relying exclusively on one-by-one searches, teams can use AI-enabled capabilities to help identify where updated documents may be available and focus human review on the information requiring action.
With Genny AI capabilities from Benchmark Gensuite, organizations can support high-volume SDS searching and more frequent review of large SDS libraries. This can help EHS teams spend less time searching for potential updates and more time evaluating and acting on the information they find.
AI does not change an organization’s HazCom responsibilities. It can, however, make the work required to manage SDS information at enterprise scale more practical.
That positioning is consistent with the original March discussion, where Genny AI-powered SDS Version Search & Content Indexing was identified as particularly relevant to regulatory-driven SDS updates, while manual confirmation and processing remained part of the workflow.
What does a practical SDS compliance plan look like for 2026–2028?
A practical plan should reflect the fact that the HazCom transition is already underway and will continue through 2028.
Understand your exposure. Identify the substances and mixtures in your chemical inventory and where revised hazard information could affect your operations.
Track revised SDSs. Establish a consistent process for identifying and evaluating updated documents received from manufacturers, importers, and distributors.
Align your plan with OSHA’s timeline. The requirements for substances and mixtures have different compliance dates, and employer obligations follow the upstream manufacturer, importer, and distributor deadlines.
Evaluate downstream impacts. Determine whether new hazard information requires updates to alternative workplace labeling, your hazard communication program, or additional employee training.
Plan for continued change. The mixture transition continues into 2027 and 2028, so SDS management should be treated as an ongoing process rather than a one-time 2026 project.
Use technology where scale demands it. For organizations managing large SDS libraries, digital and AI-enabled capabilities can make it easier to identify updates, prioritize review, and maintain visibility across sites.
Final Takeaway: HazCom 2026 Is Underway, but the SDS Transition Is Far From Over
The first major HCS 2024 compliance deadline passed in May 2026, but EHS teams are still in the early stages of a transition that continues through May 2028.
For employers, the next milestone is November 20, 2026, when necessary substance-related updates to alternative workplace labeling and hazard communication programs, along with any additional employee training for newly identified hazards, must be completed. The mixture phase then extends the transition through 2027 and 2028.
That makes visibility especially important. EHS teams need processes that can identify changing SDS information, evaluate what those changes mean for their workplaces, and keep required information accessible to employees throughout the transition.
Benchmark Gensuite helps organizations manage that process at scale with integrated SDS management and Genny AI Agent Hub capabilities designed to help teams search large SDS libraries, identify information requiring attention, and focus their time where human review and action are needed.
