Safety at work isn’t optional. It’s essential. The Hazard Communication Standard (HCS), also called “HazCom,” is one of the key safety rules by the Occupational Safety and Health Administration (OSHA). It makes sure that workers know what chemicals they are working with and how to use them properly.
OSHA published a final HazCom rule in May 2024, with the update taking effect July 19, 2024. However, full compliance is spread across deadlines through 2026, giving employers time to adjust. These changes align U.S. chemical safety rules with global standards and push for clearer hazard communication. This guide will walk you through HazCom updates and how you can prepare so your workplace stays safe and compliant.
Read More: What Is Hazard Communication Standard (HCS)?
What OSHA's Hazard Communication Standard Means
HazCom is about transparency. Workers have the right to know what substances are around, what hazards they represent, and how to be safe. To support this, the standard requires:
Labels on chemical containers that are easy to read
Safety Data Sheets (SDS) that list all the dangers in detail
OSHA Training programs that teach workers how to handle chemicals responsibly
HazCom and the Globally Harmonized System (GHS)
OSHA incorporated elements of the GHS to make chemical safety information consistent worldwide. This alignment means:
Labels look the same across countries
Pictograms and signal words are universally recognizable
SDS follow the same structure everywhere
This OSHA GHS consistency helps workers quickly recognize hazards, even if they change job sites or work internationally.
Shared Responsibility for Safety
Chemical safety depends on both employers and employees.
Employers must:
Find dangerous chemicals in the workplace
Make sure that all containers are properly labelled.
Make SDS easy to find
Teach employees how to handle things safely and be mindful of hazards.
Employees should:
Before using, read the labels and SDS.
Wear the right safety gear and follow the safety rules.
Tell someone right away if you see spills or dangerous situations.
If something isn't clear, ask questions.
When everyone does their part, chemical risks are easier to deal with, and everyone is safer at work.
Read More: How to Get OSHA Certified
Important Changes in HazCom in 2025
The 2025 amendment to the HCS by OSHA is meant to make chemical danger information easier to grasp, more in line with international standards, and more useful in the workplace. Here are the most essential changes and what they mean for employers and workers.
Alignment with Global Standards
The new standard is based on the United Nations' Globally Harmonised System (GHS) Revision 7, which is also used in Canada, the European Union, and other key trading partners. This implies that labels, pictures, and Safety Data Sheets will look and read more the same around the world. This will make things less confusing for firms and workers who work across borders.
Broader Hazard Classifications
There are going to be a few new forms of hazard categories, such as aerosols (which are no longer only "flammable aerosols"), desensitized explosives, chemicals under pressure, and some types of gases, such as unstable and pyrophoric gases. These modifications make it easier to find hazards and talk about the risks of a larger range of drugs in a clearer way.
New Rules for Labelling
Standardized features such as signal words, product IDs, hazard and precautionary statements, and pictograms must now be on labels so that important information is easy to access at a glance. Using "transport labelling" for bulk shipments can cut down on extra labels. For small containers, the laws are more flexible and allow all information to be on the outside of the box. If a shipping container already has a Department of Transportation pictogram on it then the HCS pictogram that goes with it is no longer required.
Updates to Safety Data Sheets
Safety Data Sheets will still include the same 16 sections, but the requirements will be more specific, especially in Section 9 (Physical and Chemical Properties). There are also new rules for the ranges of chemical concentrations. This allows manufacturers to protect trade secrets while still giving workers the details they need to stay safe.
Expanded Classification Process
When looking at hazards, manufacturers and importers must now think about all the ways a chemical might be used, not just the one it was made for. It is also necessary to look at the possible risks of chemical reactions that could happen in the workplace.
Training and Implementation Timeline
Employees will need to learn about the new label parts, pictograms, and SDS format again. Employers should alter their training materials and communication materials to reflect these changes. The rule went into effect on July 19, 2024, but businesses don't have to fully follow it until 2026, which gives them time to get used to it.
Also Read: How to Request a Replacement for Your OSHA 10 Card Online
Timeline for Complying with HazCom 2025
The HazCom 2025 update from OSHA goes into effect on July 19, 2024, but compliance is phased in over the course of several years. This step-by-step method offers chemical makers, sellers, and employers time to change the way they classify chemicals, update labels and Safety Data Sheets (SDS), and teach workers about the new rules.
Step 1: Date of Effect
The new Hazard Communication Standard takes effect on July 19, 2024. Businesses can now choose to follow either the 2012 standard, the 2025 standard, or both until their own compliance deadline.
Step 2: Deadlines for Substances
Manufacturers, importers, and distributors of substances must classify compounds according to the new criteria and update all labels and SDSs by January 19, 2026.
Employers who use these chemicals must update their workplace labelling, hazard communication programs, and employee training by July 20, 2026.
Step 3: Deadlines for Mixtures
By July 19, 2027, people who make, import, or sell mixtures must follow the new rules for classification, labelling, and SDS. Employers who use combinations must update their labels, programs, and training by January 19, 2028.
Transition Period
Businesses can follow either the old HazCom 2012 guidelines or the new HazCom 2025 rules, or both, from July 19, 2024, until each deadline. Employers will only be able to make changes to workplace labelling and training if they get new information about chemical hazards from their suppliers before the deadlines.
This longer schedule is meant to keep things running smoothly while making sure that by 2028, every workplace that uses dangerous chemicals has clear, consistent, and up-to-date hazard information that meets worldwide standards.
Penalties for Non-Compliance
Not following HazCom 2025 rules can cost you a lot of money and time in court. OSHA enforces these standards through its general penalty system. As of January 15, 2025, the highest fines have gone up.
Every year, these values are changed to keep up with inflation. If a requirement like adequate labelling, updated Safety Data Sheets (SDS), or worker training is not completed, fines can be imposed.
Criminal Penalties
Not following the rules can sometimes lead to criminal charges. Some examples are:
Willful OSHA violations that result in a worker’s death
Knowingly providing false information to OSHA
Alerting others in advance of an OSHA inspection
Criminal penalties can include fines of up to $10,000 (or $20,000 for multiple offences) and up to a year in jail.
Beyond the Fines
The costs of non-compliance go beyond monetary penalties:
Operational disruptions from inspections and mandated corrections
Reputational damage when citations are made public
Stricter state-level penalties in states with their own OSHA-approved plans
How HazCom 2025 Aligns with GHS
The HazCom 2025 update from OSHA brings the U.S. in line with the 7th Revision of the United Nations' Globally Harmonized System (GHS Rev. 7). This replaces the 2012 GHS Revision 3 alignment. This change makes it easier to understand hazard information across borders and makes it more consistent with international chemical safety standards used by Canada, the EU, and other major trading partners.
GHS Revision 3 vs. GHS Revision 7
Parameter | GHS Revision 3 (HazCom 2012) | GHS Revision 7 (HazCom 2025) |
Hazard Classifications | Basic hazard classes and categories | Expanded and refined hazard classes, including aerosols (not just flammable aerosols), desensitized explosives, chemicals under pressure, and pyrophoric/unstable gases |
Labeling Elements | Standardized pictograms, signal words, hazard statements | Updated hazard/precautionary statements, flexible labeling for small containers, optional HCS pictogram if DOT pictogram is already present |
Safety Data Sheets (SDS) | 16-section format introduced | Same 16-section format with added details (e.g., particle characteristics in Section 9), updated ingredient concentration range rules with trade secret flexibility |
Classification Guidance | Focus on intended uses of chemicals | Must consider all reasonably anticipated uses, including possible chemical reactions during normal handling |
New Hazard Categories | No distinct classes for desensitized explosives or chemicals under pressure | Adds new distinct categories to improve risk communication |
Training Requirements | Training on 2012 label and SDS formats | Updated training to cover new label elements, pictograms, SDS details, and expanded classifications |
International Consistency | Partial alignment with other countries | Closer alignment with Canada, EU, and other GHS Rev. 7 adopters |
The Hazard Communication Standard: Staying Ahead
HazCom 2025 is a big step forward in making chemicals safer at work. The new HCS helps both employers and employees find dangers and stay safe by following the most recent GHS guidelines, adding more hazard categories, and making labeling and training requirements clearer. But following the rules isn't only about avoiding fines; it's also about creating a culture of safety where everyone knows the risks they face and how to deal with them safely.
The clock is already ticking down to the compliance deadlines. Are you ready to learn HazCom 2025? Sign up for our Hazard Communication Standard Compliance Course today and get step-by-step help with fulfilling the new rules. This will keep your workplace safe, compliant, and ready.
FAQs
What is OSHA’s Hazard Communication Standard (HazCom)?
HazCom is OSHA’s rule that ensures workers know about the chemicals they use and the risks involved. It requires labels, safety data sheets, and training so employees can handle hazardous materials safely in the workplace.
What changed in the 2025 HazCom updates?
The 2025 updates align U.S. rules with global standards (GHS Revision 7). They make chemical labels clearer, improve hazard classifications, and update safety data sheet requirements. The goal is to give workers more consistent, easy-to-understand chemical safety information.
When do employers need to comply with the new HazCom rule?
The final HazCom rule took effect July 19, 2024, but OSHA allows phased compliance through 2026. This gives chemical manufacturers, importers, and employers time to update labels, safety data sheets, and training programs.
How do the HazCom updates help workers?
The changes make labels easier to read, clarify health risks, and align chemical information with international standards. Workers get better guidance on handling chemicals safely, which reduces accidents, improves workplace awareness, and strengthens overall protection against chemical hazards.
What should employers do to prepare for HazCom 2025?
Employers should review the new requirements, update training materials, and ensure safety data sheets match the new standards. They also need to work with suppliers to get updated labels in place before compliance deadlines arrive in 2026.
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