Description
Froehde Reagent Instructions
To use Froehde reagent, put a tiny bit of your substance on a white ceramic plate. Place one drop of reagent on the sample. (Some reagents require a drop from two separate bottles, but Froehde reagent consists of only one bottle.) Compare the color change to the color bars in the chart below. Most color changes happen fast. Colors and times are approximate. Multiple factors can cause slight variations. Remember, reagents cannot detect purity, only presence. Store them in a refrigerator. Wash the plate thoroughly when done.








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