How to Read an SDS

Every safety data sheet follows the same sixteen-section format under the Globally Harmonized System. Once you know what lives in which section, finding a specific answer takes seconds rather than minutes.

The sections you will use most

Section 2 — Hazard identification. Signal word, hazard statements, and pictograms. This is the section to read before a product is handled for the first time.

Section 4 — First aid measures. Post this at the point of use. It is the section someone needs while they are already in trouble, which is the worst moment to be searching a PDF.

Section 8 — Exposure controls and personal protection. Exposure limits and the PPE actually required. Glove material matters here; not all nitrile is equal against all solvents.

Section 9 — Physical and chemical properties. pH, specific gravity, flash point, boiling point. This is where most process engineering questions get answered.

Section 10 — Stability and reactivity. Incompatible materials. Read this before deciding what gets stored next to what — most storage incidents trace back to this section being skipped.

Section 14 — Transport information. UN number, proper shipping name, hazard class, and packing group. Required for any shipping paperwork you generate.

Revision dates matter

An SDS is a controlled document. Section 16 carries the revision date, and a sheet more than a few years old may not reflect the current classification. The sheets on this site are the current revision for the product as we supply it.

If you hold an older sheet in a binder and the revision dates differ, use ours and replace the binder copy.

What an SDS is not

An SDS is not a specification. It gives typical properties and hazard information, not the guaranteed analytical values for the lot you received — that is what a Certificate of Analysis is for. If your process depends on a tight assay window, ask for the CoA.

Questions about a specific sheet: email cs@mileschemical.com or call (818) 504-3355.