How this site makes money
Some supplier links on this page are affiliate links. If you buy through them we may earn a commission at no extra cost to you. It never changes what we publish or how we rank compounds.
Which links are affiliate links
Any link that leads to a supplier store is an affiliate link. It is labelled with a shield icon and the words 'verified partner' wherever it appears, and it always carries a sponsored attribute so search engines can identify it too.
What a commission does not buy
It does not buy a favourable write-up, a softened safety note, or a place in a ranking. Partners cannot review pages before publication and have no editorial input of any kind.
How partners are chosen
We review published certificates of analysis, testing standards, sourcing transparency and how a supplier communicates. Products must be clearly labelled research-use-only. Suppliers that fail on any of these points are not listed.
What it costs you
Nothing. Where a partner operates an affiliate programme, the commission is paid by the supplier out of their margin. Your price is the same whether you arrive through our link or go directly.
Why we disclose at all
You are entitled to know how a recommendation is funded before you act on it. Disclosure appears on the page containing the link, and again in the footer of every page on the site.
Questions about a link?
Send us a message and we will explain exactly how any partnership on this site works.
Contact the editorial team