Company
About Ziffer
European research-reagent supply. Every listing states CAS, sequence, formula and mass from a recorded source. Any batch assay is published before purchase.
Why this exists
A purity figure is the number this category sells on, and most of the time it is published with nothing behind it. Certificates, where they exist at all, usually arrive in the box — proof delivered after the decision it was supposed to inform.
Two rules apply here instead. A figure appears on a listing only with a recorded primary source and the date it was read behind it, or it does not appear at all. And a batch assay is published on the product page before the order, or the page states that there is none. Neither rule is impressive. Both are checkable on any page of this site, which is more than can be said for the purity figure they replace.
As of today the assay library holds no certificate at all. Nothing on this site rounds that up: every product page prints the absence where the certificate would be, and the library counter reads zero.
What a listing has to carry
We do not publish who manufactures the material. That is deliberate and it is the normal posture in this category — sourcing that is published is sourcing that is copied. It costs this page its strongest paragraph, and nothing written below is meant to make up the difference.
8 of 8 listings state all four identity figures — CAS number, sequence, molecular formula and molecular mass. All 32 of those figures carry a recorded source and the date it was read. Each product page prints that date beside the figure it belongs to, and prints a dash where there is no source rather than leaving the reader to assume one.
Where the source is a public chemical registry, the product page links it and the figure can be checked without us. Where it is a manufacturer’s own specification sheet, the page gives the class of document and the date, and not the document. That is a real limit on what you can verify from this site, and it is stated rather than papered over.
What we import, and what that makes us responsible for
Importing into the EU makes the importer responsible for classification, labelling, safety documentation and product liability — duties that a domestic reseller would otherwise be absorbing invisibly on your behalf. We carry them directly. That is a cost, and it is priced in rather than hidden.
Company
The operating entity is not yet registered, so this site is not trading. Registration number, VAT identifier and registered address will be published in the imprint before any order can be placed — not afterwards, and not on request.