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Chongqing Defeng Chemical Industrial Co.,Ltd
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Tannic Acid for industrial uses ( Technical grade )
Other name :Tannin , Chinese gall tannic acid
Properties : Light yellow to light brown powder ,with a
peculiar smell and taste very astringent , soluble in a
portion of water or alcohol , as well as in
acetone ,insoluble in chloroform or ether .
Specifications :comply with China national standard GB5308-
85
Technical Data :
Content of tannic acid : 81% min.
Weight loss after dessication : 9 % max.
Insoluble materials in water : 0.6% max.
Total color : 2.0 max.
Usage :For the extractction of germanium , the production
of ink , rust preventer of metals ,and mud treater in
petroleum drilling ,and as raw material for pharmaceutical
industry .
Storage : Keep in airtight containers .
Package : In plastic bags , N.W.25kg / bag
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