For which purpose are viscous solutions difficult to dispense using a standard syringe?

Viscous solutions are characterized by their high resistance to flow, which is a result of their high viscosity. This property makes them difficult to dispense using a standard syringe, as the plunger may require significantly more force to push the thick solution through the narrow opening of the syringe, leading to challenges in accurately measuring and delivering the desired dose.

When dealing with solutions that have low viscosity, they flow easily and can be dispensed with minimal effort, making them ideal candidates for use with standard syringes. Temperature regulation does play a role in viscosity; for instance, warming a viscous solution can decrease its viscosity, making dispensing easier, but this does not change the inherent difficulty that arises with high-viscosity solutions. Concentration of the solution can affect its viscosity, but it is not the primary concern when it comes to the dispenser's ability to handle the solution effectively. Therefore, the challenge associated with dispensing is directly linked to the high viscosity of the solution itself.