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A Safety Data Sheet (SDS) is a standardized document containing information about the properties, potential hazards and safe handling of a chemical substance or mixture.
Safety Data Sheets play an important role in communicating safety information throughout the chemical supply chain. They are commonly used in laboratories, manufacturing environments, warehouses and other professional settings where chemicals are handled.
Within the European Economic Area, the format and content of an SDS are governed by REACH legislation. An SDS follows a standardized structure consisting of sixteen sections.
The primary purpose of an SDS is to provide information that helps chemical substances and mixtures to be handled safely and responsibly.
This topic is closely related to What is a Technical Data Sheet (TDS)? and What is a Certificate of Analysis (CoA)?, which provide additional context for the interpretation and characterization of chemical materials.
An SDS may contain information about:
The information that is relevant depends on the substance or mixture concerned and the data available.
A European SDS is divided into 16 numbered sections. This standardized structure allows people who regularly work with Safety Data Sheets to locate the same types of information quickly, regardless of the supplier that prepared the document.
The detailed requirements for this structure are established in Annex II of REACH.
No. This distinction is important. An SDS is primarily a document for communicating safety and hazard information. It is not automatically a complete technical product specification.
Information such as molecular formula, molar mass, appearance, physical state, solubility or other properties may be included in an SDS when relevant and available. More detailed technical product specifications may instead be provided in a Technical Data Sheet (TDS).
An SDS and a TDS therefore serve different purposes.
No. An SDS should not be interpreted as a Certificate of Analysis (CoA).
A composition or concentration stated in a Safety Data Sheet is not the same as a batch-specific analytical result. An SDS is intended to communicate safety information about a substance or mixture; it is not designed to serve as an analytical certificate for an individual batch.
When evaluating an analysis that has actually been performed, factors such as the analytical method used, the sample tested, the reported result and its relationship to a specific batch are important.
Information about chemicals and regulatory requirements can change. An SDS may therefore need to be revised.
When consulting an SDS, it is useful to check not only the substance name but also information such as:
This helps establish which version of the available safety information the document represents.
These terms are sometimes used interchangeably, although the documents serve different purposes.
An SDS primarily addresses hazards, safety information and safe handling.
A Technical Data Sheet (TDS) describes technical product information and specifications.
A Certificate of Analysis (CoA) reports analytical information relating to a particular batch or tested sample.
The existence of an SDS therefore does not automatically mean that a batch-specific analysis is available for the same substance.
A Safety Data Sheet is only one part of chemical documentation. To evaluate technical information properly, it is also useful to understand product specifications, analytical certificates and the different analytical methods used to characterize chemical substances.
The Rexar Knowledge Base covers these subjects separately, allowing each article to focus on one clearly defined technical topic.