Supplier Frequently Asked Questions

Explore answers to some of the most frequently asked Trinseo supplier information questions.

How do I verify the status of a payment?

For questions regarding Purchase Orders, suppliers should use the contact listed on the Purchase Order or refer to our Invoice Contacts List.

How do I receive a Purchase Order?

Suppliers can receive Purchase Orders from Trinseo via fax, mail, or EDI (electronic data interchange).

Who do I call when I have a question?

For commercial questions, suppliers should contact their identified buyer directly. For general questions regarding purchasing policies or for contract implementation issues, suppliers should contact their regional purchasing representative.

For transactional questions, suppliers should contact their service center using the phone number listed on the purchase order.

I am a local supplier. Do I have an opportunity to supply Trinseo?

Yes. Trinseo bases its relationships with suppliers on how well the supplier meets existing needs and how well they can fulfill future strategic needs. Trinseo will conduct business with suppliers who are globally competitive and who will provide the lowest long-term cost of ownership.

How do I become a supplier?

Please send an email to

Include the following information:

  • Company Name:
  • Address:
  • Locations:
  • Phone Number:
  • Email:
  • Contact Name:
  • Service or Material Provided

Does Trinseo only operate with global suppliers?

No. Trinseo develops purchasing strategies which use suppliers at the global, area, and site levels.

What does the supplier need to know about REACH?

REACH, a chemicals management policy, stands for the Registration, Evaluation, and Authorization of Chemicals. We ask suppliers for a commitment to REACH, including whether they intend to pre-register and register, as well as an approximate idea of their registration timeline.  

For additional supplier information, contact Trinseo.

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