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On July 6th 2022 we updated the security certificate used by our ChemNet service. We do this every year because SSL certificates are only valid for a fixed length of time.

We believe that most devices will continue to automatically trust the new certificate, but some devices (especially those running iOS such as iPads and iPhones) might warn you that the certificate has changed when connecting to ChemNet. The details of the new certificate are:

  • Serial Number: e8:23:6b:1d:8d:17:44:38:1e:79:99:88:27:6d:45:a9
  • Subject: C = GB, ST = Cambridgeshire, O = University of Cambridge, OU = Department of Chemistry, CN =
  • Issued By: GEANT Vereniging
  • Issuing Certificate: GEANT OV RSA CA 4
  • Validity:
    • Not Before: Jul  5 00:00:00 2022 GMT
    • Not After : Jul  5 23:59:59 2023 GMT

This certificate can safely be trusted. However, if the details do not match, please do not connect to the network and send details to

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