Plenty of chemical libraries still contain documents titled "Material Safety Data Sheet", and plenty of people still call every safety data sheet an MSDS. The terms describe the same kind of document from different eras of OSHA's Hazard Communication Standard. This guide explains the difference, shows how to tell which kind of document you are holding, and sets out how to review a legacy MSDS library: verifying supplier, product and revision, requesting current documents and keeping versions in order.
SDS and MSDS: the terminology
The 2012 revision of OSHA's Hazard Communication Standard, 29 CFR 1910.1200, aligned it with the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) and replaced the Material Safety Data Sheet (MSDS) with the Safety Data Sheet (SDS), in a standardized 16-section format. "MSDS" is the older name and the older, less uniform document; "SDS" is the current name and format.
The standard has since been updated again. The HazCom 2024 update took effect on July 19, 2024. Manufacturers, importers and distributors update labels and SDSs by May 19, 2026 for substances and November 19, 2027 for mixtures; employers update workplace labels, their hazard communication program and training by November 20, 2026 and May 19, 2028. During the transition either the updated or the prior version of the standard may be followed. So a current-format SDS may itself be revised as suppliers work through the 2024 changes.
Source29 CFR 1910.1200 - OSHA Hazard Communication StandardHow to tell which document you have
Don't rely on the title alone: titles and layouts varied, so check the content as well. Look at these points:
- Count and order of sections: a current SDS has 16 numbered sections in a fixed order, starting with Section 1, Identification, and Section 2, Hazard identification.
- Hazard identification: on a current SDS, Section 2 carries the hazard classification, signal word, hazard statements, pictograms and precautionary statements.
- Ingredients: a current SDS gives composition and information on ingredients in Section 3.
- Properties: physical and chemical properties are in Section 9 of a current SDS.
- Revision date: a current SDS gives the date of preparation or last revision in Section 16, Other information. On older documents, look in the header, footer or last page.
Side-by-side: older MSDS and current SDS
MSDS formats varied between suppliers, so treat the middle column as what you will often see, not a fixed rule.
| What to look for | Typical older MSDS | Current 16-section SDS |
|---|---|---|
| Title | Often "Material Safety Data Sheet" | "Safety Data Sheet" |
| Structure | Number and order of sections varied; no fixed order | 16 sections in a standardized order |
| Product and supplier identity | Usually near the top, layout varied | Section 1, Identification |
| Hazard summary | Often spread across several sections | Section 2: classification, signal word, hazard statements, pictograms, precautionary statements |
| Ingredients | Content and layout varied | Section 3, Composition/information on ingredients |
| Physical and chemical properties | Present, position varied | Section 9 |
| Revision date | Often in a header or footer, if shown | Section 16, Other information, including date of preparation or last revision |
Layout alone does not settle whether a document is current. Confirm with the supplier before retiring or relying on it.
Old does not mean obsolete
A document's age is a reason to check it, not proof that it has been replaced. Under 29 CFR 1910.1200(g)(5), manufacturers, importers and distributors must add significant new information to the SDS within three months of becoming aware of it, so a sheet revised several years ago may still be the supplier's current version if nothing significant has changed. Equally, a recent-looking document may already have a newer revision.
A document titled "Material Safety Data Sheet" is a strong prompt to ask the supplier for the current document. Keep the legacy document in place until you have the replacement in hand and have confirmed it matches the product, so a work area is never left without a sheet.
Source29 CFR 1910.1200 - OSHA Hazard Communication StandardSupplier, product and revision verification checklist
Verify each legacy document before replacing or keeping it
- The manufacturer or supplier name and address match the container label or purchase record.
- The product identifier matches the container label exactly, including any grade, concentration or product code.
- The document is identified as an SDS or an MSDS, and its revision or preparation date is recorded.
- You know whether the product is still purchased or used, and in which areas.
- You have asked the supplier whether a newer revision exists, and recorded the answer and date.
- Any replacement document matches the same manufacturer and product before it is filed.
- The superseded document is archived with the areas and dates it was used, not deleted.
- A reviewer other than the person who collected the document has checked the match.
Requesting and reviewing the current supplier document
Your supplier is the authoritative source. Under (g)(6), manufacturers, importers and distributors must provide the SDS with the initial shipment and with the first shipment after the SDS is updated, so check recent deliveries first. If nothing came with a shipment, ask the supplier directly. A useful request names the manufacturer, the exact product identifier and product code from your container, the revision date you currently hold, and asks for the current SDS or confirmation that your copy is current.
To check whether a document exists before you contact the supplier, you can search safety data sheets on NeoTech's public SDS search and review the summary shown. Searching and summaries are free; downloading documents currently requires platform access. Treat anything you find as a lead to confirm: compare its manufacturer, product identifier and revision date with your container and with what the supplier tells you.
- Same manufacturer and product, newer date: replace, and archive the old document.
- Same manufacturer and product, same date: keep the document you hold and note that it was confirmed.
- Different manufacturer, grade or concentration: do not file it; it is a different product.
- No response from the supplier: keep the legacy document in place and follow up.
Maintaining versions after the review
Once a legacy library is reviewed, keep it from drifting back. Record the replacement decision for every incoming document, archive superseded sheets and retest employee access after changes. Under OSHA's exposure-records rule, 29 CFR 1910.1020(d)(1)(ii)(B), safety data sheets need not be kept for any specified period, as long as some record of the identity of the substance, where it was used and when it was used is retained for at least 30 years, so keep that record for anything you retire.
In NeoTech's SDS management software, each record in the Workspace SDS Library's detail view carries Is SDS and Is MSDS flags and stores the revision date alongside the manufacturer, product and product code, so a reviewer opening a record can see at once whether it is a legacy MSDS and how old the revision is. A replacement can come in two ways: add a matching record from the shared global SDS library with "Add to Workspace", or upload the supplier's PDF, which is extracted and waits on the Submitted tab until a reviewer checks the pre-filled detail form, corrects it and saves. The platform does not check suppliers for new revisions for you; the request routine above still applies. For the wider workflow, see how to manage safety data sheets.
Source29 CFR 1910.1020 - Access to employee exposure and medical records (OSHA)Regulatory statements in this article were checked against the official sources linked above on .