单宁酸

等级

puriss.

质量水平

200

形式

powder

自燃温度

980 °F

质量

meets analytical specification of USP

杂质

dextrines, gum matters, in accordance
resinous matters, in accordance
≤0.003% heavy metals (as Pb)

灼烧残渣

≤0.1% (as SO4)

缺失

≤9% loss on drying, 105 °C, 2 h

mp

218 °C (lit.)

溶解性

H2O: soluble 1 gm in 0.35ml
glycerol: soluble 1gm in 1 ml (warm)
acetone: very soluble
alcohol: freely soluble (Diluted)
alcohol: slightly soluble (Dehydrated)
alcohol: very soluble
benzene: insoluble
carbon disulfide: insoluble
carbon tetrachloride: insoluble
chloroform: insoluble
diethyl ether: insoluble
hexane: insoluble
petroleum ether: insoluble

痕量阳离子

As: ≤3 mg/kg

application(s)

metabolomics
vitamins, nutraceuticals, and natural products