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; inorganic tanning substances; tanning preparations, whether or not containing natural tanning substances; enzymatic preparations for pre-tanning 1.7% 1.7% 3203 colouring matter of vegetable or animal origin (including dyeing extracts but excluding animal black), whether or not chemically defined; preparations...
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: sesamin and sesamolin. both of these substances belong to a group of special beneficial fibers called lignans, and have been shown to have a cholesterol-lowering effect in humans, and to prevent high blood pressure and increase vitamin e supplies in animals. sesamin has also been found to protect the...
amphiprotic substances reactions of an amphiprotic substance see also notes references external links credits examples of amphoteric substances include water , amino acids , and proteins . many metals (such as zinc , tin , lead , aluminum , and beryllium ) and most metalloids have amphoteric oxides...