SDS vs MSDS: What Changed and Why It Matters
Short answer: an SDS (Safety Data Sheet) is the current, GHS-aligned format with a fixed 16-section order; an MSDS (Material Safety Data Sheet) is the older, non-standardized format OSHA retired when it adopted GHS in 2012. The information is similar, but every SDS now follows the same structure, so a sheet from one manufacturer looks like a sheet from any other. If you still have binders labeled “MSDS,” replace them with the manufacturer's current SDS. Here's what changed and why it matters.
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MSDS: the old way
The Material Safety Data Sheet had no required structure. Each manufacturer organized it however they liked, so finding first-aid steps or storage requirements meant hunting through a different layout every time. Quality and completeness varied wildly.
SDS: the GHS-aligned standard
When OSHA aligned the Hazard Communication Standard with the Globally Harmonized System (GHS) in 2012, the MSDS became the Safety Data Sheet (SDS) with a mandatory 16-section format in a fixed order. OSHA published the final rule on March 26, 2012 and phased it in, with compliance required by June 1, 2015 (the dates are in the next section). The 16 sections are:
- Identification
- Hazard(s) identification
- Composition / information on ingredients
- First-aid measures
- Fire-fighting measures
- Accidental release measures
- Handling and storage
- Exposure controls / personal protection
- Physical and chemical properties
- Stability and reactivity
- Toxicological information
- Ecological information
- Disposal considerations
- Transport information
- Regulatory information
- Other information
When did MSDS become SDS? The phase-in dates
OSHA published the revised Hazard Communication Standard on March 26, 2012. Its own effective-dates table sets the transition:
- December 1, 2013 — employers train employees on the new label elements and the SDS format.
- June 1, 2015 — chemical manufacturers, importers, distributors and employers comply with all modified provisions. Distributors could keep shipping containers carrying the manufacturer's older label until December 1, 2015.
- June 1, 2016 — employers update alternative workplace labeling and their hazard communication program as necessary, and train employees on any newly identified physical or health hazards.
So the short answer to “when did MSDS become SDS” is 2012 for the rule and June 1, 2015 for compliance, with employers' follow-through due by June 1, 2016.
Why the standardization matters
Because the order is fixed, anyone can find the same information in the same place under stress — first aid is always Section 4, handling and storage always Section 7, PPE always Section 8. GHS also standardized the hazard classifications, signal words ("Danger" / "Warning"), pictograms, and hazard/precautionary statements, so the warnings mean the same thing everywhere.
What to do with old "MSDS" files
For products you still use, replace any pre-2015 MSDS with the manufacturer's current SDS. For discontinued products, you may still need to retain the historical record — see how long to keep safety data sheets. SDSentry stores the current SDS for each product in your inventory and can look sheets up by product name or UPC barcode, so refreshing an old binder into a clean digital library is straightforward.
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Frequently asked questions
What is the difference between an SDS and an MSDS?
An SDS (Safety Data Sheet) is the current GHS-aligned format with a fixed 16-section order. An MSDS (Material Safety Data Sheet) is the older, non-standardized format OSHA retired when it adopted GHS. The information is similar, but SDSs follow a uniform structure.
When did MSDS change to SDS?
OSHA published the revised Hazard Communication Standard on March 26, 2012. Employers had to train employees on the new SDS format by December 1, 2013; manufacturers, importers, distributors and employers had to comply by June 1, 2015; and employers had until June 1, 2016 to update workplace labeling, their hazard communication program and training for newly identified hazards.
Are old MSDS documents still compliant?
No. Since OSHA’s 2012 HazCom update, with full transition by 2015 to 2016, manufacturers must provide GHS-format safety data sheets. You should replace any MSDS files with the manufacturer’s current SDS.
What should I do with old MSDS files?
Replace them with the current manufacturer SDS for products still in use. For discontinued chemicals employees were exposed to, retain a record of the chemical identity and exposure period under OSHA's 30-year records rule.
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