乙酸 yǐ suān 🔊 acetic acid (CH3COOH) + Review this word Meanings yǐ suān acetic acid (CH3COOH)ethanoic acid Its characters 乙yǐsecond of the ten Heavenly Stems…HSK 5酸suānsourHSK 4 Words with 乙酸 乙酸基 yǐ suān jī acetyl radical CH3COO- 乙酸根 yǐ suān gēn acetyl radical CH3COO- 乙酸盐 yǐ suān yán acetate CH3COO-