The quality of solvents that are used for extraction and purification of pesticide residues is subject to the Food Sanitation Law and other regulations. Tighter quality specifications are applied to this product for which it is guaranteed to meet the quality requirements specified by the Food Sanitation Law even in a 300-fold concentration. The product also conforms to JISK8039 "Acetonitrile for pesiticide residue and PCB analysis" (300x conc.)