I think this question has probably gone as far as it's going to - so I have decided to reveal the answer.
Butter of Antimony (better known as Antimony trichloride) is a chemical compound with the formula SbCl3. It is a colourless, crystalline solid. What is remarkable about this chemical is its solubility. At room temperature, 100mls. of water will dissolve 910gms. of SbCl3 – that’s nine times its own weight! Compare that with Sodium chloride (common salt) at 36gms. or Sucrose (table sugar) at 217gms. Even more remarkable, water at 50°C will dissolve nineteen times its own weight of SbCl3! It is by far the most water soluble substance known to exist. But the tale doesn’t end there! Antimony trichloride is an inorganic (i.e. contains no carbon atoms) compound. Inorganic substances by and large tend not to dissolve in organic (i.e. carbon containing) solvents such as nail polish remover (Acetone), anti-freeze (Ethylene glycol), dry-cleaning fluid (Tetrachloroethlene), pure spirit drinks (Ethanol), etc., but Antimony trichloride will happily dissolve in all of them. It is a truly remarkable substance!!
OK, Chemistry lesson over with for today – I declare an Open Floor.