Does this powder have any harmalas?

Also if anyone has the pKa values for these harmalas that would be helpful.

yep that's the idea. Harmalas are soluble in water.

Most people find it much more cost effective to enrich their organic plant matter with the harmalas from the Caapi leaf rather than extract and use pure Harmala freebase or purchase them from vendors. The effects are the same. You need a min of 10g Caapi leaves to infuse 1g of spice. Just buy an ounce its cheap and you can use it for lots of things. Take 10g of leaf in a pot and add water as if you were making a pot of tea. Bring to a slow boil or simmer for a couple hours adding water to keep the level consistent.

Remove plant material by however you wish. I like to use a fine mesh sack used to strain jams but a cotton t is just as good. Ring out your leaf and put all the combined liquid back into the pot to reduce. Here you can go 2 ways. You can add a fresh gram of leaf to the reducing liquid, slowly simmer off the water then leave out to fully air dry, or you can reduce the liquid alone, evaporate the remainder and scrape up the powdery residue. This crude Haramla powder will be later added to 1g of Caapi leaf to make a 10x 1 to 1 changa blend.