A crystalline material, C15H14O6, derived from catechu and utilized in tanning and dyeing. Also known as catechol.
among the tannic acids (C15H14O6), obtained from catechu as a white, crystalline compound; -- labeled as also catechuic acid, catechinic acid, cyanidol, and catechuin. It really is a flavonoid found generally speaking in higher woody flowers, and it is used in dyeing and tanning.
A principle (C19H18O8) obtained from catechu, having a snow-white silky look, and crystallizing in fine needles. Also called catechuic acid and catechuin.
a tannic acid this is certainly obtained from black colored catechu as a white crystalline material