Safety Data Sheets: what is in the sixteen sections and which ones you actually use
· medixanimals
A Safety Data Sheet is the standard document describing the hazards of a chemical product and the precautions for handling it. Under the Globally Harmonised System of Classification and Labelling of Chemicals, it has a fixed sixteen-section structure, in a fixed order, so that the same information is always in the same place regardless of who wrote it.
The sixteen sections
| Section | Content | | --- | --- | | 1 | Identification of the substance and the supplier | | 2 | Hazard identification, including classification and label elements | | 3 | Composition and information on ingredients | | 4 | First-aid measures | | 5 | Firefighting measures | | 6 | Accidental release measures | | 7 | Handling and storage | | 8 | Exposure controls and personal protection | | 9 | Physical and chemical properties | | 10 | Stability and reactivity | | 11 | Toxicological information | | 12 | Ecological information | | 13 | Disposal considerations | | 14 | Transport information | | 15 | Regulatory information | | 16 | Other information, including the revision date |
The sections used most often
In practice a clinic or a laboratory returns to a small subset:
- Section 2 when deciding whether a product needs special handling at all.
- Section 4 in an incident, which is the argument for having the sheet accessible rather than filed somewhere.
- Section 7 for storage conditions and incompatibilities.
- Section 8 for the personal protective equipment actually required, which is frequently more specific than a general assumption about gloves.
- Section 14 when arranging transport, because it carries the UN number, the proper shipping name, the hazard class and the packing group that determine how the item may be shipped.
Versions matter
A Safety Data Sheet is revised when the classification, the formulation or the regulatory position changes. Two sheets for the same product name can therefore say different things, and the one that matters is the one current at the time the product was supplied.
That has a practical consequence for record keeping: storing a link to "the latest SDS" loses the history. A sheet should be versioned, the old version retained rather than overwritten, and the version supplied with a given purchase recorded against it. Section 16 carries the revision date, which is the field to check when comparing two copies.
Certificates of analysis are a different document
A Safety Data Sheet describes hazards for a product in general. A Certificate of Analysis reports measured results for a specific lot: identity, purity, and whatever assay values apply. When a laboratory needs to know what a particular batch actually tested at, that is the certificate, not the safety sheet.
Both belong with the product, and both are lot-relevant in different ways — the safety sheet by version, the certificate by lot number.
This article describes a documentation standard in general terms. It is not veterinary, medical, safety or regulatory advice, and it does not describe the hazards of any specific product. Always read the Safety Data Sheet supplied with the product you are handling.