Glacial acetic acid treatment is mainly a cooling effect when the chip is packaged.
Glacial acetic acid, formula CH? COOH is an organic monobasic acid, which is the source of acid and pungent odor in vinegar. Pure anhydrous acetic acid (glacial acetic acid) is a colorless hygroscopic liquid with a freezing point of 16.7 ° C (62 ° F) and becomes a colorless crystal upon solidification. Although glacial acetic acid is a weak acid based on its ability to dissociate in aqueous solutions, glacial acetic acid is corrosive and its vapors are irritating to the eyes and nose.