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The quick answer
A Technical Data Sheet describes a product grade and usually presents typical or target properties. A Certificate of Analysis reports test results for an identified batch or lot. A Safety Data Sheet communicates hazard, handling, storage and emergency information. Buyers often need all three, but the documents answer different questions.
Approval should begin with the intended application. Drilling-fluid barite, coating-grade white barite and a premium micronized filler do not use the same acceptance criteria. The buyer should define the required properties, units, test methods and limits before comparing suppliers.
What is the difference between TDS, COA and SDS?
| Document | Main purpose | What the buyer should verify |
|---|---|---|
| TDS - Technical Data Sheet | Describes the grade, intended applications and its typical or specified properties | Product identity, revision date, units, test methods and whether values are typical or guaranteed |
| COA - Certificate of Analysis | Reports results for a named batch or lot | Batch number, test date, measured results, acceptance limits and authorization |
| SDS - Safety Data Sheet | Provides safety, handling, storage, transport and emergency information | Correct product identity, current revision and suitability for the destination market |
An SDS does not confirm particle size, whiteness or batch conformity. A COA does not replace safe-handling information. A polished TDS also does not remove the need for sample and batch verification.
Which barite specifications should buyers check?
Product identity and grade
Confirm the product name, model or grade, barium sulfate identity, physical form and intended application. The same supplier may offer several barite grades with different acceptance criteria.
Specific gravity or density
Density is central for drilling applications and may also matter in industrial formulations. Check the unit, method and acceptance basis. Do not compare values produced by different methods as though they were automatically equivalent.
Chemical composition and impurities
Depending on the application, the document may report barium sulfate content and selected mineral or chemical impurities. The required list should come from the buyer's process and product risk, not from a generic template.
Particle size and coarse residue
A mesh label is only a starting description. Ask whether the document reports sieve residue, average particle size or a full particle-size distribution. Record the method because results from sieve and instrumental methods answer different questions. For more detail, read Barite particle size: mesh, micron, D10, D50 and D90.
Moisture, colour and application properties
Industrial buyers may need moisture, whiteness, brightness, undertone, pH, oil absorption or dispersion-related checks. These properties should be selected for the formulation. A number that is important for white coatings may be irrelevant to drilling-fluid acceptance.
A simple buyer comparison table
| Question | Where to look | Reason |
|---|---|---|
| Is this the correct grade? | Purchase specification and TDS | Prevents approval of a similarly named but different product |
| Are the limits clear? | Purchase specification and TDS | Separates typical information from contractual acceptance criteria |
| Does this shipment meet them? | Batch COA | Connects measured results to the supplied lot |
| Were comparable methods used? | TDS, COA and agreed method list | Avoids misleading comparisons between laboratories |
| Is the material suitable in practice? | Approved sample and application trial | Confirms behaviour in the buyer's actual process |
| Is handling information available? | Current SDS | Supports workplace, storage and transport controls |
Common warning signs
- The product name on the COA does not exactly match the quotation or TDS.
- The COA has no batch or lot identifier.
- Values have no units, methods or acceptance limits.
- Typical values are presented as guaranteed without a defined specification.
- The document reports only one attractive result while omitting application-critical properties.
- The sample, production batch and shipping documents cannot be traced to one approved grade.
Checklist before a bulk order
- State the final application and the grade required.
- Issue a written purchase specification with limits, units and test methods.
- Review the current TDS and SDS.
- Request a representative sample and its matching COA.
- Test the sample in the intended process or formulation.
- Record the approved sample, document revisions and acceptance criteria.
- Require a batch COA for the commercial shipment.
- Check the batch identity, packaging labels and documents at receipt.
- Retain a reference sample when the purchase procedure requires it.
For drilling material, compare these steps with the API 13A barite requirements guide. For industrial applications, review Industrial White Barite and Premium White Barite, then agree the application-specific specification before ordering.
References
- ISO 3262-2:2023, Extenders - Specifications and methods of test - Part 2: Baryte.
- API Specification 13A / ISO 13500, drilling-fluid materials.
- SCRREEN2 Baryte Factsheet, mineral identity, properties and main end uses.
- KANIPER technical data sheets for API Drilling Barite, Industrial White Barite and Premium White Barite.
Need documents for a barite grade?
Send the application, required specification, test methods, quantity and destination. KANIPER can provide the relevant technical document and discuss sample approval.
Contact KANIPER