Quality and documentation
What arrives with the material, when each document is issued, and what each one actually certifies.
The three documents, and the difference between them
- SDSSafety data sheet
Hazard, handling, storage and emergency information for the substance. Provided in the required format ahead of delivery.
- TDSTechnical data sheet
Typical properties and application guidance for a grade. Available before you order, so a formulation can be assessed.
- CoACertificate of analysis
Analytical results for one specific production lot. Issued against your shipment after the lot is allocated — never in advance and never per product.
Why the certificate of analysis works that way
A certificate of analysis reports what was measured in a particular batch. Two lots of the same grade from the same plant will have different figures within the same specification, which is exactly why the document exists.
That is why you will not find a download button for one on a product page here. A published, product-level certificate would be meaningless at best and misleading at worst, and any buyer who works with batch traceability would notice.
Specification and acceptance
| Stage | What happens |
|---|---|
| Contract | The specification the material will be judged against is fixed in writing, including the monograph or standard where one applies |
| Allocation | A production lot is allocated and its certificate of analysis is issued for that lot |
| Pre-shipment | Independent inspection can be arranged at your request and instruction, before loading |
| Retained sample | Retained samples can be arranged where your process or registration requires them |
| Non-conformance | If a lot does not meet the agreed specification we replace it and pursue the root cause with the producer |
Storage and shelf life
Storage conditions and shelf life belong to the product and are stated on the technical data sheet and the safety data sheet. Where a material is temperature-sensitive or has a limited shelf life, the remaining shelf life at delivery is agreed as part of the contract rather than left to chance.
What we do not certify
A distributor does not manufacture, and this site claims no manufacturing certification. Where a producing site holds a certification relevant to your qualification process, we can request evidence of it from the producer for your file — but that certification belongs to the site that holds it, not to us.
We publish no certification claim of our own without a certificate number and an issuing body that can be checked. A logo without a number is not evidence, and we apply that standard to ourselves before applying it to suppliers.