COA vs SDS vs TDS: which document do you need?
Three documents buyers confuse constantly. Here is what each one is for and when you need it.
Chemical buyers deal with three key documents. They are not interchangeable.
COA - Certificate of Analysis
Batch-specific test results proving your lot meets specification (assay, purity, key parameters). Use it for quality verification and audits. See how to read a COA.
SDS - Safety Data Sheet (formerly MSDS)
A 16-section GHS document covering hazards, safe handling, storage, PPE, first aid, and disposal. Use it before anyone handles the chemical. Legally expected for hazardous materials.
TDS - Technical Data Sheet
Describes typical properties, applications, and usage guidance for a product (not batch-specific). Use it to decide whether a product fits your application.
| Document | Answers | Batch-specific? |
|---|---|---|
| COA | “Does this batch meet spec?” | Yes |
| SDS | “How do I handle it safely?” | No |
| TDS | “What is it and what is it used for?” | No |
Every Lubechem order ships with a batch COA and a GHS SDS, plus a GST invoice with the correct HSN code - see the Document Center.
Frequently asked questions
Is MSDS the same as SDS?
Effectively yes - “SDS” is the current GHS term that replaced the older “MSDS”. Both describe the safety document for a chemical.