Purity in Certificate of Analysis

[pcocco]

Someone can explane to me the difference between " Chemical Purity" ; "Chirlal Purity" ; "Optical Purity" ; "Potency Assigned"?
Which is the best parameters to use for calculate the assay?
Many thanks
p

[JGK]

Suggest you contact the producer of the C of A for clarification

Potency values generally account for both water content and inpurity content of the material. I would use this value in STD calculations

The others are probably impurity factors determined by a series of proprietary measurement techniques.