If you are sourcing the above 1,4,7,10-Tetraazacyclododecane-1,4,7,10-tetraacetic acid, 1,4,7-tris(1,1-dimethylethyl) ester, sodium salt (1:1) from China, just feel free to inquire, we will get the competitive price from China Manufacturer & Supplier for you ASAP.