How to read a Safety Data Sheet

Purpose and structure

Under the Globally Harmonised System an SDS follows sixteen numbered sections in a fixed order, from identification through to regulatory information. The fixed order exists so that a receiving warehouse, a laboratory and a carrier can each find what they need without reading the whole document.

The sections that matter first

Section 1 identifies the substance and the responsible supplier, including an emergency contact. Section 2 states hazard classification, pictograms, and hazard and precautionary statements. Section 3 gives composition. Section 4 gives first aid measures. Sections 7 and 8 cover handling, storage and exposure controls, which are the sections that determine whether your site can accept the material at all.

Sections buyers commonly skip

Section 9 physical and chemical properties supports engineering and storage decisions. Section 10 stability and reactivity flags incompatibilities. Section 13 disposal and Section 14 transport information determine whether the material is regulated in transit and what documentation the carrier will require. Section 15 records regulatory status relevant to the jurisdiction the sheet was written for.

Version control

An SDS carries a revision date and often a revision number. An out-of-date sheet is a compliance gap: request the current revision, check that the jurisdiction and language match your operation, and confirm the classification reflects the form you are buying.

What an SDS is not

An SDS is not a Certificate of Analysis, not a specification, and not evidence of regulatory approval. It says nothing about batch quality or purity, and a substance being described in an SDS does not indicate that its supply is permitted for a given use or destination.

Practical check

Confirm the substance name and any identifier match the material offered, the supplier named is the entity you are contracting with, the revision is current, and Sections 7, 8 and 14 are compatible with your site and your inbound logistics.