HI-7004L PH 4.01 Buffer Solution, 500 Ml Bottle

The pH 4.01 buffer is available in a 500 ml bottle, one of the most widely used buffer solutions. It is extremely stable and represents the midpoint in the acid range of the pH scale – ideal for those who require accurate acid readings, especially in water treatment plants, the food industry, and anywhere the pH is expected to be acidic.