Sodium Carbonate importation request from China

We need about 400 tons of sodium carbonate to Tanzania
DAR ES SALAAM port every month. We are looking for long-term partners. If you have any interest, please kindly provide us the quotation of your products and certificate of analysis before GMT+8 10:00 on May 11, 2022 to our email
If any question please feel free to let us know. We will appreciate your reply.
Looking forward to hear from you! Hope you all well.