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Monodisperse Polyethyleneglycol (PEG)

Cyclodextrin Derivatives

Amino acid



Carboxylic acid


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Shinsei Chemical Company Ltd. (
is a specialized manufacturer in fine chemicals for laboratory use.

Our manufacturing techniques have developed over the course of more than 30 years in custom synthesis of organic compounds.

We have synthesized and isolated more than 50,000 organic chemicals making the most of our original expertise and techniques.
Special compounds on our web site are selected from our recent decades' synthesis, which do not conflict with our customer's non-disclosure agreements.
Majority of these chemicals are highly specialized and available only through us.

We are ready to supply in small scales ranging from milligrams upto about one gram quantities. We can not deal with bulk synthesis needs.

We do not accept nor respond to any contacts by phones, by e-mails.
Please contact us using the inquiry form.

We apologize that we, at the moment, correspond to custom synthesis inquiries exclusively from domestic (Japanese) companies or public institutions.

Compounds we can provide to overseas customers is limited in "our products" listed above.

You can specify the product number and get information of your compounds using the "Compound search" engine. CAS RN, molecular formula, compound name can be used as keywords.