Our Reference Material - RM of pH are manufactured meeting a strict quality control with raw materials and instruments tracked throughout its chain, ensuring a quality of all standards produced. The pH buffer solution at 25°C can be acquired in flasks of 250 mL with expiration date of 12 months. The flask with 250 mL improves the handling of the standard on the daily usage reducing the rates of waste by possible contaminations. Look the concentration and the model of the RM solution on the table below and click to check the characteristics: