Do MSDS Sheets Expire? OSHA Rules, Update Triggers, and Deadlines

Safety data sheets don’t expire, and neither did the MSDS sheets they replaced. No OSHA rule sets a shelf life, a renewal cycle, or a discard date. What the Hazard Communication Standard requires instead is that the sheet be revised whenever the manufacturer, importer, or preparer learns significant new information about the chemical’s hazards or the measures needed to handle it safely, and that the revision happen within three months of learning it.¹

One quick note on terminology. The MSDS (Material Safety Data Sheet) was retired in the 2012 overhaul of the Hazard Communication Standard and replaced with the current 16-section SDS format. If you still have paperwork labeled MSDS in a binder somewhere, it is by definition out of date under the current rules, and the answer to whether it “expires” is really a question of whether it has already been superseded.

Why There Is No Expiration Date

OSHA’s Hazard Communication Standard, 29 CFR 1910.1200, tells preparers exactly what has to appear in each of the 16 sections of a safety data sheet, including the date the sheet was prepared or last revised. It does not set a validity period.²

The reason is practical. A chemical’s hazard profile doesn’t change on a schedule. A stable, well-studied substance may go a decade without any new data worth adding. A newer formulation might need two revisions in one year. Tying revisions to new information rather than the calendar keeps the sheet accurate instead of merely refreshed.

What Actually Triggers a Required Update

The duty to revise kicks in when the preparer becomes newly aware of significant information about the chemical’s hazards or the protective measures needed to handle it.¹ The regulation doesn’t provide an exhaustive list, but the situations that clearly qualify include:

A new or changed hazard classification, such as a substance being reclassified from a mild irritant to a corrosive.
New toxicological data that reveals previously unknown chronic effects or lower safe exposure thresholds.
Revised permissible or recommended exposure limits published by OSHA, NIOSH, or ACGIH.
Changes to the chemical’s composition or the concentration of hazardous ingredients.
Newly identified personal protective equipment or emergency response measures.

If the chemical isn’t currently being produced or imported when the new information surfaces, the preparer still has to add it to the SDS before the chemical is reintroduced into any workplace.¹

The Three-Month and Six-Month Clocks

Once a preparer learns significant new hazard information, the SDS must be revised within three months. That duty falls on whoever prepared the sheet in the first place, which usually means the chemical manufacturer or importer but can also include an employer who formulates or repackages chemicals.¹

The revised sheet then has to travel with the first shipment of that chemical after the revision. Distributors carry the same obligation to pass the updated SDS along, and must make it available on request.¹

Container labels run on a slightly longer track. When significant new hazard information surfaces, shipped container labels must be updated within six months, and every container shipped after that six-month mark must carry the new label.¹

How to Keep Old Sheets From Quietly Going Stale

Because nothing on the sheet forces it to be replaced, an SDS can sit in a binder for years while the underlying chemistry, exposure limits, or supplier formulation has moved on. This is the single most common gap OSHA inspectors find in hazard communication programs: not missing sheets, but old ones that nobody noticed had been superseded.

A common industry practice is to review every SDS every three to five years even without a triggering event. The workable version of that habit: log the preparation or revision date shown in Section 16 of each sheet, flag anything older than three years, and check with the manufacturer or importer to confirm you have the current version. If your copy is outdated, request the latest one.

Your Duties for the Sheets on Site

Employers who use hazardous chemicals have obligations that run alongside the manufacturer’s revision duty. You must keep an SDS for every hazardous chemical in the workplace and make it readily accessible to employees during their entire shift, in or near their work area.¹ “Readily accessible” means the employee can get to the information immediately, not after asking a supervisor or walking to another building.

You also have to train employees on how to read and use the sheets, including the order of the 16 sections and where to find hazard information, first-aid measures, and PPE requirements. Training has to happen before an employee first works with a chemical and again whenever a new hazard is introduced.¹

If a hazardous chemical shows up without a sheet, or the sheet you have looks outdated, contact the manufacturer, importer, or distributor for the current version. If you make a good-faith effort and still can’t get one, your local OSHA Area Office will help.³

Keeping Records After a Chemical Leaves

When you stop using a hazardous chemical, you don’t have to keep the SDS itself forever. But you do have to keep some record identifying the chemical, where it was used, and when it was used, for at least 30 years. That obligation comes from 29 CFR 1910.1020, the rule that governs employee exposure records, and it exists so that workers who develop occupational illnesses years after exposure can trace what they were exposed to.⁴

Employees and their designated representatives can request access to those exposure records. You have 15 working days to respond. If you can’t meet that deadline, you have to tell the requester why and when the record will actually be available.⁴

The 2024 Update That Will Replace Most SDSs Anyway

Even though sheets have no expiration, a large share of them are about to be reissued for reasons unrelated to any single chemical. OSHA published a major update to the Hazard Communication Standard in May 2024, aligning it with Revision 7 of the Globally Harmonized System. It is the most significant change since the 2012 shift from MSDSs to the current SDS format.⁵ Notable changes include a new hazard class for desensitized explosives, updated classification criteria for flammable gases and aerosols, revised labeling flexibility for small containers of 100 mL or less, and formalized prescribed concentration ranges for trade secret ingredients.⁶

In January 2026, OSHA extended the original compliance deadlines by four months. The current schedule:⁷

May 19, 2026 for manufacturers, importers, and distributors evaluating substances.
November 20, 2026 for employers updating workplace labels, hazard communication programs, and training for substances with newly identified hazards.
November 19, 2027 for manufacturers, importers, and distributors evaluating mixtures.
May 19, 2028 for employers updating labels, programs, and training for mixtures.

Until those deadlines pass, either the 2012 version or the 2024 version of the standard satisfies compliance, or both. Once the applicable deadline arrives, the 2024 version controls. OSHA estimates that more than 90 percent of SDSs currently in circulation will need updates as a result, so plan on a wave of revised sheets landing regardless of whether the underlying chemicals have changed.

What Missing or Outdated Sheets Cost

Hazard communication was the second most frequently cited OSHA standard in fiscal year 2024, and the most common citations are for failing to keep accessible SDSs and failing to maintain a written hazard communication program.⁸

As of 2025, the most recently published penalty schedule, a serious violation carries a maximum fine of $16,550, and a willful or repeated violation can reach $165,514.⁹ The amounts are adjusted annually for inflation. Each missing or inaccessible sheet can be cited as a separate violation, so a workplace with a dozen unmanaged chemicals can look at six-figure exposure from a single inspection.

1
eCFR. 29 CFR 1910.1200 – Hazard Communication
2
Occupational Safety and Health Administration. 1910.1200 App D – Safety Data Sheets (Mandatory)
3
Occupational Safety and Health Administration. Hazard Communication Effective Dates and SDSs
4
Occupational Safety and Health Administration. Access to Employee Exposure and Medical Records
5
Occupational Safety and Health Administration. Interpretation of 1910.1200 – Clarification on Effective Date of SDSs Replacing MSDSs
6
Occupational Safety and Health Administration. Final Rule Modifying the HCS to Maintain Alignment with the GHS
7
Federal Register. Hazard Communication Standard
8
Occupational Safety and Health Administration. Top 10 Most Frequently Cited Standards
9
Occupational Safety and Health Administration. 2025 Annual Adjustments to OSHA Civil Penalties