甲醛，无色有刺激性气体，化学式HCHO或CH₂O，分子量30.00，又称蚁醛。无色，对人眼、鼻等有刺激作用。气体相对密度1.067（空气=1），液体密度0.815g/cm³（-20℃）。熔点-92℃，沸点-19.5℃。易溶于水和乙醇。水溶液的浓度最高可达55%，通常是40%，称做甲醛水，俗称福尔马林（formalin）。
Formaldehyde, colorless and irritant gas, chemical formula HCHO or CH З o, molecular weight 30.00, also known as formic aldehyde. Colorless, irritating to human eyes and nose. The relative density of gas is 1.067 (air = 1), and the density of liquid is 0.815g/cm ³ （-20℃）。 Melting point - 92 ℃, boiling point - 19.5 ℃. Soluble in water and ethanol. The concentration of aqueous solution can reach up to 55%, usually 40%, which is called formaldehyde water, commonly known as formalin.
所以，甲醛是有味道的，就是无色有刺激性的气味
Therefore, formaldehyde has a taste, which is colorless and pungent