Aqua Master Calibration Solution pH 4.01 100ml (Case of 18): This is a 100 ml pH 4.01 calibration solution. Each solution is traceable to the NIST standard. It is advised to close immediately after use. For optimal performance, store this solution between 59-77°F. Note that there should be no return of liquid.
Packaging: The Aqua Master Calibration Solution is sold as a case of 18 bottles. This ensures that you get a good supply of the solution, reducing the need for frequent reordering. Each bottle is carefully packaged to maintain the integrity of the solution.