Characteristics White or almost white crystalline powder
Identification Reaction of color/Ultr. /Infrared /Water solution: Reaction of chloride should be positive
Clarity and color of solution Meet the requirements

Acidity 2.0-3.0
Loss on drying Nmt 1.5%
Methylbenzene Nmt 0.089%
Heavy metals Nmt 20ppm
Residue on ignition Nmt 0.1%
Related substances  HPLC: Various peak area nmt twice of 0.1% comparing peak area

Piperazine TLC: The point with impurity piperazine no deeper than the point of comparing solution(0.1%piperazine anhydrous)
Assay C14H24N2O3Cl2: 98.5-101.5%