Biologix® pH Calibration Buffer Solution, 500mL/Bottle

This pH buffer calibration solution is designed for consistent pH meter performance at 25°C across laboratory, hydroponics, aquarium, and general water testing applications. Produced in accordance with NIST traceable standards, it supports stable and repeatable calibration. The solution is pre-mixed and ready to use with no preparation required, and comes in a 16.9 fl oz (500 mL) bottle for extended use. Each buffer is color coded for easy identification (pH 4.00 red, 7.00 green, 10.01 blue), helping simplify the calibration process. Compatible with most pH meters and testers, it has a shelf life of up to 2 years when unopened.