When you buy chemicals, two documents matter most: the Certificate of Analysis (COA) and the Safety Data Sheet (SDS). This guide explains what each one is, what it contains, and why you should always have them.
Certificate of Analysis (COA)
A COA confirms that a specific batch of a product meets its stated specifications. It typically lists the assay (purity), appearance and key impurity limits, along with batch/lot information. The COA is your proof that the grade on the label matches what is in the container.
Safety Data Sheet (SDS)
An SDS (formerly MSDS) provides the health, safety and handling information for a substance — hazards, first-aid measures, storage, personal protective equipment, transport classification and more. It is essential for handling chemicals safely and legally.
Why you should always request them
- To verify purity and quality before use (COA)
- To handle, store and transport the chemical safely (SDS)
- To meet your own regulatory and audit requirements
What to expect from a good supplier
A reputable supplier provides a COA and SDS for each product on request, with up-to-date, accurate information. If a seller cannot provide these, treat it as a red flag.
Documentation on request from Ozon Chemical
Ozon Chemical provides COA and SDS on request across its catalogue, as an EU-registered, REACH-compliant supplier. Learn more on our compliance page.
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