Bluelab pH 4.0 Calibration Solution - 250 ml

Keep your pH testing routine on track with Bluelab pH 4.0 Calibration Solution. This 250 ml bottle provides a pH 4.0 reference point for calibrating pH meters, pens and probes.

• 250 ml bottle
• pH 4.0 buffer for regular calibration
• For use with Bluelab pH meters, pens and probes
• Use alongside pH 7.0 solution for two-point calibration, following your meter's instructions

Store in a cool place away from direct sunlight and heat. Keep the lid tightly closed.