Hi,

The "CH" before or after the number simply means the potency (say 9 in your question) "C" indicates it is in the centesimal scale, "H" means made in the manner of Hahnemann (centesimal Hahnemann, using fresh vial each step of potentizing). If the remedy states "CK" it means a C potency made according to Korsakovian method. Korsakoff method uses one vial, pouring out and refilling for each step up the scale. If only says "C", I guess it's open to investigation, however most remedies sold in the US today (other than Borion which is a French company) generally just say "C". "SK" - Skinner method. "F" - Fincke method....etc.

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