Quebracho is a hardwood tree indigenous to . Their notoriously dense wood earned them a name derived from the phrase, quebrar hacha which means axe breaker. It is the source of the worlds most stable polyphenol. These polyphenols are what makes quebracho of interest of medicine. Its extracts naturally contains tannins, a water soluble polyphenol. Quebracho is a proanthocyanidin within the class of tannin, making it an extremely powerful antioxidant. They have many medicinal properties such as antifungal, antiviral, antimicrobial and anti-inflammatory. Quebracho is suitable for dyeing cellulose fibres and also performs well on silk and wool, and yields a lovely pinkish peach to brown rose colour. On wool brighter shade can be obtained using the Alum mordant.
