pH Calibration Buffer Solution traceable to NIST, Red, pH 4.0

pH Calibration Buffer Solution, pH 4.0: A ready-to-use aqueous buffer designed for precise pH meter and electrode calibration at acidic pH. Colour coded red for easy identification and traceability.

Traceable to NIST: Each batch is prepared against reference materials from NIST with documented traceability.

Manufactured in the UK: Our pH 4.0 Buffer Solution is manufactured and bottled using non-toxic, chemical-resistant bottles, providing reliable and trusted quality to our customers.

Frequent Uses

Primary Calibration at Acidic pH

Used as a calibration point for pH electrodes in single or multi-point routines around pH 4.0 to verify slope and offset.

Routine Quality Control Checks

Ideal for daily verification of instrument performance, documenting NIST traceability within GLP and ISO systems.

Temperature Compensation Verification

Supports checks of automatic temperature compensation by confirming stable readings near 25°C.

Rinsing Between Calibration Points

Used to rinse probes between buffer steps to minimise cross-contamination during multi-point calibration sequences.

Education and Training

Suitable for teaching labs and training sessions to demonstrate best practice in pH measurement and calibration.

HS Code / Commodity Code: 3822900000

Prec Phrases: P264,P281,P501