Other plants contain it but Mimosa hostilis is probably cheaper, more widely available, and ecologically-friendly to harvest because it's a frontier species. Where it's native they even use it as animal fodder and it will probably survive the increasing drought conditions in South America.
I got mine from a Dutch company that ships out of Germany: https://www.mimosaroot.com/product/mimosa-hostilis-inner-root-bark-mhrb-powder/ . It's legally sold as a clothing dye with 50g being enough to provide maybe 10 trips. Extracting it only requires working with lighter fluid around a stove and sodium hydroxide/drain cleaner crystals, both of which are extracted out from the final product.
I've only used the pure sodium hydroxide crystals which are legally sold for soap-making. It's just the same thing used in drain cleaners so the same kind of alkaline burn precautions apply.
Other plants contain it but Mimosa hostilis is probably cheaper, more widely available, and ecologically-friendly to harvest because it's a frontier species. Where it's native they even use it as animal fodder and it will probably survive the increasing drought conditions in South America.
I got mine from a Dutch company that ships out of Germany: https://www.mimosaroot.com/product/mimosa-hostilis-inner-root-bark-mhrb-powder/ . It's legally sold as a clothing dye with 50g being enough to provide maybe 10 trips. Extracting it only requires working with lighter fluid around a stove and sodium hydroxide/drain cleaner crystals, both of which are extracted out from the final product.
Don't use drain cleaner, you need pure lye or you can get some nasty byproducts in there.
I've only used the pure sodium hydroxide crystals which are legally sold for soap-making. It's just the same thing used in drain cleaners so the same kind of alkaline burn precautions apply.