Good's buffer has the following characteristics: 1. High water solubility; 2. Low cell membrane permeability; 3. stable acid-base dissociation constant; 4. Low metal chelating capacity; 5. High chemical stability; 6. Low absorption spectra in ultraviolet and visible region;7. Low salt effect; 8. Easy to make high purity salt. They are essential raw materials for in vitro diagnostic reagents in the process of production.