A safety data sheet answers a different question from a certificate of analysis. The certificate says what is in one lot of one vial. The safety data sheet says how a substance should be handled, stored, cleaned up and disposed of by the people who work around it, and it says so in a layout that is fixed by regulation rather than by the issuer. Once the layout is familiar, a four-page sheet takes about two minutes to read.
This guide walks the sixteen sections, points at the four a buyer actually opens, and explains the classification line that appears on every sheet in the safety data sheet library. It uses the sheets on file for this catalogue as the worked example, because they are the ones a buyer here will be reading.
What the library holds
The safety data sheet library lists 41 documents. Every one is issued by the source supplier, printed in Section 1 as American Peptides, and every one is version 1.0, issued on 6 July 2026, four pages long, and prepared to OSHA HazCom 2012 (29 CFR 1910.1200) in the GHS sixteen-section format. Restate Health does not issue or alter them; it lists each against the products it covers and links the original file.
All 41 carry the same classification line: "Not classified as hazardous". Of the 41, 26 print a CAS number, eight are blends for which no single CAS number applies, and seven single compounds print "Not assigned", which is the honest entry for a sequence that has no registry number. That pattern is worth knowing before reading any one sheet, because it tells you the sheets were prepared as a set, to one template, on one day.
Where the sixteen sections come from
The United States Hazard Communication Standard, 29 CFR 1910.1200, requires the chemical manufacturer, importer or distributor of a hazardous chemical to supply a safety data sheet, and paragraph (g) fixes the section numbers, headings and order. Appendix D to the same section lists the minimum content under each heading. The 2024 revision of the standard, published in the Federal Register on 20 May 2024 and effective from 19 July 2024, aligns the standard primarily with Revision 7 of the United Nations Globally Harmonized System of Classification and Labelling of Chemicals, which is where the sixteen-section layout originates.
Two details of the rule matter for reading. First, paragraph (g)(3) says that where no relevant information is found for a sub-heading, the preparer must mark it to indicate that no applicable information was found. A sheet that reads "no data available" in several places is complying, not hiding. Second, Note 2 to paragraph (g)(2) states that OSHA will not be enforcing the information requirements in Sections 12 through 15, because those areas are not under its jurisdiction. The headings must be present; the content is a matter for other agencies.
The sixteen sections, and who each one is for
| Section | Heading | What it holds | Who reads it |
|---|---|---|---|
| 1 | Identification | Product identifier, synonyms, supplier name and contact, recommended use and restrictions on use | Buyer, receiving |
| 2 | Hazard(s) identification | Classification, signal word, hazard and precautionary statements, pictograms, hazards not otherwise classified | Buyer, safety officer |
| 3 | Composition/information on ingredients | Chemical name, synonyms, CAS number, impurities that contribute to classification | Buyer, records |
| 4 | First-aid measures | Measures by route of exposure | Safety officer |
| 5 | Fire-fighting measures | Extinguishing media, hazards in a fire | Safety officer |
| 6 | Accidental release measures | Spill containment and clean-up | Bench staff |
| 7 | Handling and storage | Precautions for handling, conditions for storage, incompatibilities | Buyer, bench staff |
| 8 | Exposure controls/personal protection | Exposure limits, engineering controls, protective equipment | Safety officer |
| 9 | Physical and chemical properties | Appearance, solubility, melting point and other listed properties where known | Bench staff |
| 10 | Stability and reactivity | Conditions to avoid, incompatible materials, decomposition products | Bench staff |
| 11 | Toxicological information | Routes of exposure, acute and chronic data where any exist | Safety officer |
| 12 | Ecological information | Environmental fate | Waste contractor |
| 13 | Disposal considerations | Disposal of the substance and its container | Buyer, waste contractor |
| 14 | Transport information | UN number and shipping classification, if any | Shipper, importer |
| 15 | Regulatory information | Regulations specific to the substance | Compliance |
| 16 | Other information | Date of preparation or last revision, version | Records |
Section headings and order from 29 CFR 1910.1200(g)(2). The reader column is this guide's assessment of who opens each section in a research laboratory.
The OSHA brief on the standard describes Sections 1 to 8 as the general information a reader needs quickly, Sections 9 to 11 and 16 as technical and scientific detail, and Sections 12 to 15 as present for consistency with the GHS. That grouping is a fair map of how the document is used.
The four sections a buyer actually uses
- Section 1, Identification. The product name as the issuer writes it, any synonyms, the supplier's name and address, and the recommended use with its restrictions. For research material this is where the restriction on use is stated, and it should agree with the research-use-only wording on the label and the invoice. If the supplier in Section 1 is not the company you bought from, you are reading a sheet passed down a supply chain, which is normal and worth recording.
- Section 2, Hazards identification. The classification line. On every sheet in this library it reads "Not classified as hazardous", and the next section of this guide explains what that does and does not mean.
- Section 7, Handling and storage. The storage conditions the issuer recommends and the incompatibilities. For a lyophilised peptide this typically agrees with the catalogue record (frozen storage, protected from light and moisture) and it is the place to check that the sheet and the label say the same thing. Peptide storage and handling covers why those conditions are set where they are.
- Section 13, Disposal considerations. What the issuer says about disposing of the substance and its container. It is rarely more than a sentence directing the reader to local regulation, and that is exactly what a waste contractor will ask to see. Disposal and waste handling for research materials covers the practice side.
Section 3 earns an honourable mention, because the CAS number printed there is the identifier that should match the certificate of analysis, the label and your own inventory record. Where the sheet prints "Not assigned", your record should say so too rather than carry a number copied from elsewhere.
What "not classified as hazardous" means
Classification under the standard is the outcome of evaluating a substance against defined physical and health hazard classes, each with its own criteria: flammability, acute toxicity by route, skin corrosion, and so on. "Not classified" means the preparer's evaluation did not find the criteria for any class to be met on the evidence available. It is a statement about the evaluation, not a certificate that the substance is inert, and it is not a statement that data exist for every endpoint. For most short synthetic peptides, Section 11 says "no data available" against most endpoints, and the classification follows from that absence.
The standard also defines a hazard not otherwise classified, HNOC, as an adverse physical or health effect identified during classification that does not meet the criteria for any of the specified classes. Where a preparer has found one, it must be described in Section 2. A sheet that is "not classified" and lists no HNOC is saying that neither route produced a finding.
One further consequence. The standard requires a sheet for each hazardous chemical. A sheet for a substance the preparer has not classified is supplied beyond that requirement, which is why coverage across a catalogue can be uneven and why the library shows a sheet only where one has been published.
Safety data sheet and certificate of analysis, side by side
| Safety data sheet | Certificate of analysis | |
|---|---|---|
| Scope | The substance, generically | One lot of one product |
| Issuer | Manufacturer, importer or distributor | The testing laboratory, or the supplier reporting its results |
| Format | Fixed: 16 sections in a set order | Set by the issuer |
| Revision | Version and date in Section 16; revised when the hazard information changes | One document per lot; never revised, only reissued |
| Identifier that must match | Product name and CAS number (Sections 1 and 3) | Lot number, against the vial |
| What it cannot tell you | Purity, identity, content or anything about your lot | Handling, storage incompatibilities, disposal, hazards |
The two documents answer different questions. Reading one for the other's content is the commonest mistake with both.
The lot number is the thing to notice. A safety data sheet has none, because it describes the substance rather than the batch. How to read a peptide certificate of analysis is the document that does, and the two are filed together rather than interchangeably.
Filing the sheet
Keep the sheet with the purchase record for the product, not only in a safety binder, because an auditor asks for it alongside the certificate and the invoice. Record the version and issue date from Section 16, and when a supplier reissues a sheet, keep the superseded version with a note of the date it was replaced. Records to keep for research purchases sets out the rest of that file.
Where material is decanted, aliquoted or relabelled inside the practice, the new label should carry the same product identifier the sheet uses in Section 1, so that anyone who picks up a secondary container can find the right sheet. Labelling and identification in a practice covers what else that label needs.
A two-minute reading order
- Section 1: product name, supplier, restriction on use. Does it match the label and the invoice?
- Section 2: classification line. "Not classified as hazardous" or a named class with a signal word?
- Section 3: CAS number. Does it match the certificate and your inventory record, or does it read "Not assigned" on both?
- Section 7: storage conditions. Do they agree with the catalogue record and the label?
- Section 13: disposal. Is there anything beyond a reference to local regulation?
- Section 16: version and date. Record both.
Everything else on the sheet is for the safety officer, the shipper or the waste contractor, and it is there when they need it. All material in the library is supplied for laboratory research use only.