The full Chinese name of TAPSO sodium salt is 3- [N-tris (hydroxymethyl) methylamino] -2-hydroxypropanesulfonate sodium, abbreviated as TAPSO Na, with CAS number 105140-25-8. It is a commonly used weak alkaline buffer in biochemical experiments, with an effective pH range of 7.0-8.2. Under normal conditions, pure white powder needs to be prepared as a solution when used. It has good solubility and can be directly prepared with distilled water. Application of TAPSO sodium salt TAPSO sodium salt, like TAPSO, belongs to the Good's buffer series and incorporates the same advantages as Good's buffer. Due to its non permeability to cell membranes and non-toxicity to cells, it has certain advantages as a buffer in cell culture media, as cell culture operations require long-term exposure to CO2. When the environmental pH value changes, it will affect the cells and lead to experimental failure. When TAPSO-Na is added as a buffer to the culture medium, it can resist drastic changes in pH value and maintain it within the required range, thus ensuring the orderly progress of cell culture experiments. So this is also its commonly used field.