The Hawach bottle-top dispenser is fixed to the reagent bottle through a screw valve. The bottle and the screw valve are tightly closed and stabilized, so that the solvent removal process is in a closed system, avoiding evaporation, splashing, and tipping of the solution. It reduces the environmental and human hazards of the solution and is much safer than the fully open pipetting process.
In organic synthesis or petrochemical laboratories, high viscosity, high density, and high volatility solvents are not uncommon, especially in the petrochemical industry. Such solutions are difficult to remove quickly and are difficult to quantify accurately with conventional graduated cylinders due to their special nature. The Hawach bottle-top dispenser is perfectly suited for the removal of such solutions.
Chloroform as a solvent for most plastics is also an important reason why many experimenters have to use traditional glass measuring cylinders and beakers to pipette. However, chloroform is extremely volatile and has anesthetic and toxic nerves, while Hawach bottle-top dispensing All parts of the solvent that come into contact with the solvent are made of PFA and glass, so the Hawach bottle-top dispenser can completely remove chloroform.