Shinsei-Chemical Co.Ltd.,

Monodisperse Polyethyleneglycol (PEG)

Cyclodextrin Derivatives

Amino acid



Carboxylic acid


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Shinsei Chemical Company Ltd. (
is a specialized manufacturer in small scale 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 more than 10,000 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.
Many of these chemicals are highly specialized and available only through us.
We are ready to supply in scales ranging from milligrams upto about one gram quantities and can not deal with bulk synthesis inquiries. We apologize that we correspond to custom synthesis inquiries from domestic (Japanese) companies / public institutions only. We do not respond to any contacts by phones nor by e-mails. Please contact us using the special inquiry form.