Peptide APIs
cGMP FDA inspected Solid Phase Synthesis Solution Phase Synthesis

Senn Chemicals – your CDMO
for SWISS quality peptides and amino acid derivatives

Made in Switzerland From early research to commercial phase

to Senn

SENN CHEMICALS has been providing custom manufacturing services to pharmaceutical, biotechnology, diagnostic and cosmetic companies worldwide since 1963. Founded by Guido Senn in Dielsdorf, near Zurich, Switzerland, Senn Chemicals' focus today is on the manufacturing of peptides, peptide fragments, amino acid derivatives and small molecules. We are cGMP approved and have been inspected several times by the US FDA.

Senn Chemicals?
- the human element at work

We are an independent, privately owned company comprised of a dedicated team of professionals with a singular purpose: your success. To us, you are not a project. You are not only a client, you are our strategic partner. We know our success depends on yours, which inspires us to provide a level of commitment unprecedented in our industry. From the CEO to the lab technician, we are fully engaged and available to you. Every day. Let us show you the difference a true manufacturing partnership can make.

News | 29.06.2023

Swissmedic GMP Certificates

Senn Chemicals was successfully re-certified by swissmedic at all Locations

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News | 20.07.2024

News | 04.03.2022

Halal Certificate 2022

Senn Chemicals was successfully re-certified by m-haditec GmbH a cooperation-Partner of the Islamic Centre Hamburg.

The used raw materiaL, the production and the packaging have been surveyed, examined and approved as halal by consensus of Islamic scholars. The company Senn Chemicals AG is therefore entitled, to use the Halal Certificate for its products.

-> Just contact us though the Website or directly by mail at to receive further information!

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Senn Chemicals serves the needs of customers worldwide in the pharmaceutical, biotechnology, cosmeceutical, and nutraceutical fields. Senn Chemicals offers products and services of exceptional value through a combination of state-of-the-art cGMP production facilities, decades of chemical manufacturing experience, a dedicated team of professionals, and commitment to customer service.

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Headquarters Senn Chemicals AG | Guido Senn-Strasse 1 | CH-8157 Dielsdorf
Phone: +41 43 422 24 00 |