Published 2026-06-24 · Updated 2026-06-29 · Demeto Technical Team
Start with identity and lot linkage
Confirm the product name, CAS number, grade, lot number, production date and document issue date. The shipment and the COA should refer to the same lot.
Separate specification from typical data
A COA reports batch results. A TDS usually presents typical properties. Only written specifications and transaction documents define the agreed acceptance limits.
Review the critical indicators
For DMT, these commonly include purity, color, acid value, moisture, ash and process-relevant trace impurities. Check units and test methods before comparing suppliers.
Use the SDS for safety decisions
The SDS covers hazards, handling, storage, exposure controls, transport and emergency response. It should not be used as a substitute for batch quality data.
Create a release checklist
Record document revision, batch identity, results versus limits, deviations and approval status. A repeatable checklist makes supplier and batch comparison more reliable.