Ready-Red™ is a coloured mixture of chloroform and isoamyl alcohol. The red colour (non toxic dye), facilitates the visualization and the separation of aqueous and organic phases during nucleic acids purification by means of phenolic extractions. The red dye of Ready-Red™ is not water-soluble and does not interfere with the quality of the nucleic acids purified. The nucleic acids recovered can be used in all standard experiments of molecular biology such as sequencing, PCR, cloning, transformations, etc.