鞣酸

róusuān

noun

Meanings

1 tannic acid
2 tannin

Characters

to tan (leather)

Examples

HSK 4

茶叶里含有大量鞣酸。

Cháyè lǐ hányǒu dàliàng róusuān.

Tea leaves contain a large amount of tannic acid.

HSK 7-9

鞣酸可以用来鞣制皮革。

Róusuān kěyǐ yònglái róuzhì pígé.

Tannic acid can be used to tan leather.

Tips

memory

鞣 literally means 'to tan leather' - the 革 (leather) radical on the left is the giveaway. So 鞣酸 = 'leather-tanning acid' = tannin. Same chemical that makes strong tea taste astringent.

Stroke Order

鞣 róu

酸 suān