Safety Data Sheet (SDS): the 16-section format explained
The Safety Data Sheet’s 16-section GHS format explained section by section: what each contains, why the order is fixed, and how to keep an SDS accurate and current.
A Safety Data Sheet (SDS) communicates the hazards of a chemical product and how to handle it safely. Unlike most product documents, its structure is not a matter of preference: the Globally Harmonized System (GHS) prescribes a fixed 16-section order, adopted into law by regimes such as OSHA’s Hazard Communication Standard in the US and REACH in the EU. This guide walks the 16 sections, explains why the order is mandatory, and covers keeping an SDS current.
Why the order is fixed
The 16-section sequence exists so that anyone (an emergency responder, a warehouse worker, a regulator) can find the same information in the same place on any SDS, in any language, from any supplier. Sections 1–11 and 16 are mandatory content; sections 12–15 carry information that may be governed by other authorities but are still expected to be present. Because the format is regulatory, you don’t design an SDS so much as populate it correctly.
The 16 sections at a glance
| # | Section | What it covers |
|---|---|---|
| 1 | Identification | Product identifier, supplier, emergency contact, recommended use |
| 2 | Hazard identification | GHS classification, label elements, pictograms |
| 3 | Composition / ingredients | Substance or mixture components and concentrations |
| 4 | First-aid measures | Symptoms and immediate response by exposure route |
| 5 | Fire-fighting measures | Suitable extinguishing media and hazards |
| 6 | Accidental release | Spill containment and cleanup |
| 7 | Handling and storage | Safe handling and storage conditions |
| 8 | Exposure controls / PPE | Exposure limits and protective equipment |
| 9 | Physical / chemical properties | Appearance, pH, flash point, and more |
| 10 | Stability and reactivity | Conditions and materials to avoid |
| 11 | Toxicological information | Health effects and exposure data |
| 12–15 | Ecological, disposal, transport, regulatory | Environmental, waste, shipping and regulatory info |
| 16 | Other information | Revision date and preparation notes |
An SDS is a regulated compliance document. This overview explains the format; the classification, hazard statements and data it contains must be prepared and verified against the current rules for your jurisdiction and product.
Keeping an SDS accurate and current
SDSs go out of date. Classifications change, ingredient data is updated, and regulations are revised on their own schedules. Two habits keep a library trustworthy:
- Treat each SDS as a controlled document with a revision date (Section 16) and a version history
- Re-issue promptly when a classification, ingredient, or exposure limit changes, because an out-of-date SDS is a compliance gap, not just a stale file
The document discipline behind a good SDS
While the content of an SDS is specialized, the document mechanics are the same ones that make any technical document reliable: a fixed structure, controlled fields, consistent formatting, and a clear revision trail. Producing SDSs from a template that enforces the 16-section order, rather than hand-formatting each one, removes a whole class of errors, in the same way a reusable template keeps product documentation consistent. DataSheets Pro offers a structured starting point that follows the 16-section layout; the safety content itself is yours to prepare and verify against the applicable regulation.
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