68% piperazine, white crystal, melting point (℃) 75 ℃ -80 ℃, CAS：142-63-2,mainly used for synthesizing anti tuberculosis and antibacterial drugs. It can synthesize N-methylpiperazine, piperazine phosphate, piperazine sulfate, norfloxacin, piperazine, quinolone, and rifampicin.