tannic acid,China maoyuan price supplier

Other name : Tannin;Chinese gall tannic acid.

Mol. form and Mol. wt. ： C ₇₆ H ₅₂ O ₄₆    1701.18
     Description : From light-yellow to light-brown powder, with a peculiar smell and astringent taste; soluble in a portion of water, Alcohol and in acetonel, insoluble in chloroform or ether.
     Technical data :

Purity                   % ≥ 81
     Loss on drying            % ≤ 10
    State in water of solution    below microetch

Light absorption              ≥ 420
    content of gallic acid       % ≤ 7
    total color                   ≤ 1.0
     Usage : In printing dye of textile, it is used as color fixer, polygenetic dye, Fiber deodorizer and synthesizing dye.
     Storage : Keep in airtight container.
     Packing : weave bag with plastic bag inside; N.W. 25kg/bag.