A friend of SWIKB is going to try to make CAT since he is not to knowledgable in chemistry. He wants to eventually make something more potent but is trying to start out simple to learn some basics first. Anyways he told me he was able to understand everything from a page he found except for one part. Here is a copy/paste... KMnO4 is saturated at 25c in water - 100ml of solution holds 7.43g This time I will be using just under 3g of pseudephedrine (if extract was perfect would be exactly 3g pseudephedrine). Keep in mind that when preparing the saturated solution you need room temperature and time - you need to let the crystals settle!!! Excess (undisolved) KMnO4 will stay "swirled in" the solution. Let it settle for a while at room temp, _then_ measure the 15mL or so...... So the question is does this mean to pour 100mL of KMn04 in then add 100mL of H20 (at 25c)And then let that sit for awhile and then take 15mL of the solution?