Reference number
ISO 2521:1974
ISO 2521:1974
© ISO 2024
ISO 2521:1974
Tritolyl phosphate for industrial use — Determination of acidity to phenol red — Volumetric method
Edition 1
1974-04
1974-04
Retirada
Resumen
Specifies the titration of any acidity present in an ethanolic solution with standard volumetric sodium hydoxide solution in the presence of phenol red as indicator. The end point of the titration corresponds to the formation of the salt Na2 HPO4 .