It is used for determining the endpoint in complexometric titrations/Metal Titration. The pzc value is typically obtained by titrations and several titration method has been developed. Through this reaction, iodine is used in redox titrations. Potentiometric titrations were first used for redox titrations by Crotogino. Thermometric titrations of silver nitrate with halides and cyanide are all possible. Typical titrations require titrant and analyte to be in a liquid (solution) form. Normality can be used for acid-base titrations. These titrations may use different types of indicators to reach some equivalence point. Complexometric titrations rely on the formation of a complex between the analyte and the titrant. Coulometric titrations use a constant current system to accurately quantify the concentration of a species. Such acid-base reactions can also be used for titrations. It is also possible to use starch as an indicator in titrations involving iodine reduction. In the laboratory, this compound is used in complexometric titrations. "o"-Cresolphthalein is a phthalein dye used as a pH indicator in titrations. Phenolphthalein's common use is as an indicator in acid-base titrations.