MSD accepts payments via purchase order. You may enter this information during the online check-out process or order by email, phone, or fax through our Customer Service Department.

MSD also offers the convenience of paying for invoices with a credit card using a secure online portal. We accept Visa, MasterCard, American Express and Discover. Debit cards are not accepted. Simply go to the link below and enter the total payment amount, invoice number(s) and credit card information. All credit card transactions will be subject to a 3.0% surcharge, automatically added to your payment, unless prohibited by state law.

https://www.mesoscale.com/payment