Water soluble tetrazolium salt (WST) ®) It is produced by introducing positive or negative charges and hydroxyl groups into the benzene ring of tetrazolium salts. Positive charges such as trialkylamino improve the water solubility of methylene dyes, but large cations are prone to precipitate with organic anions such as carboxylate or phosphate. Although hydroxyl groups can also enhance the water solubility of tetrazolium salts, the water solubility of the resulting methylene dyes is insufficient. Dojindo's WST ® Having sulfonic acid groups, they are directly or indirectly added to the benzene ring to enhance water solubility. Dojindo also offers several newly developed phenylazo tetrazolium salts, which can be easily reduced by NADH or other reducing agents to obtain orange or purple methylene dyes. Due to the use of phenylazo groups, the color will change with heavy metal ions. Due to Dojindo's WST ® Due to its high water solubility, solutions with different concentrations ranging from 10 mM to 100 mM can be prepared.
The mechanism of electron transfer to tetrazole salts