In order to better serve you we ask that you read below before filling out this form.

If you are looking to request a quote for a product CIL does not currently manufacture, we ask that you please use our custom quote request form by clicking here. 

If you are looking for a quote request for an existing CIL product please create or login to your account here .

All other inquiries, aside from quote requests can be sent by completing the form below. 

Ask the Experts | Contact Us

Customer Service: 1-800-322-1174 ; Main Number/Reception: 1-978-749-8000

For Domestic Requests (US and Canada) email: cilsales@isotope.com

For International Requests (outside US and Canada) email: intlsales@isotope.com

Note: when emailing either of the email addresses listed above, please be sure to include your complete contact information, including company, address and phone number. It is also helpful to include an  Application Area of Interest such as any of the following: MS, NMR, NMR + MS, Environmental, Environmental + MS, Trace Element Analysis, Breath Test, CTM, Custom Synthesis, Deuterium, Forensics, Gases, Nuclear Medicine.

For Accounting Requests (Invoices/Payment Inquiries) email: ar@isotope.com

Cambridge Isotope Laboratories, Inc.
3 Highwood Drive
Tewksbury, MA 01876

CIL Account Coordinators are available from 8:00 A.M. to 5:00 P.M. Eastern Standard Time Monday through Friday.