MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Ethanoic acid, glacial and liquid. Both bottles contain ethanoic acid (CH3.COOH, also known as acetic acid), but glacial acetic acid is the water free (anhydrous) form. Pure, water-free ethanoic acid freezes to a colourless at 16.7 degrees Celsius, just below normal room temperature. Ethanoic acid is the chemical that gives vinegar its sour taste and strong smell.
Model release not required. Property release not required.