Hanna pH 4.0 Buffer Calibration Solution - 500ml - NIST Traceable

NIST-Traceable pH 4.0 Reference for Reliable Meter Calibration

Hanna pH 4.0 Buffer Calibration Solution provides a precise, stable reference point for single or two-point pH meter calibration. Traceable to NIST standards and manufactured to pH 4.01 accuracy, this 500ml solution is ideal for slightly acidic measurement applications, including water purification, food industry testing, and hydroponic systems where acidic pH ranges are expected. An added dye aids immediate visual identification, and the air-tight, tamper-proof opaque bottle protects solution integrity for a five-year unopened shelf life.

Key Features & Benefits

• NIST-traceable calibration standard - Each batch is traceable to NIST standards, ensuring the accuracy and credibility of your pH calibration process.
• pH 4.0 reference accuracy - Stable pH 4.01 accuracy provides a reliable calibration point for all compatible Hanna pH meters.
• Added dye for easy identification - Color coding makes it instantly distinguishable from other calibration solutions to prevent mix-ups.
• Air-tight tamper-proof opaque bottle - Sealed construction protects solution from light and contamination for maximum shelf stability.
• Five-year shelf life (unopened) - Long shelf life reduces waste and allows bulk purchasing without concern over solution expiry.
• Certificate of Analysis available - COA available by batch on request for laboratory or compliance documentation requirements.

Who Should Use This

Hydroponic growers, greenhouse operators, laboratory technicians, and water quality professionals who use Hanna pH meters and require accurate, documented pH 4.0 calibration solutions for routine meter maintenance.

Compatibility

Compatible with Hanna Instruments pH meters and probes requiring pH 4.0 calibration buffer. Prepared in accordance with ISO 3696 and BS3978 standards. Temperature chart on label shows actual pH values at various temperatures. COA available by batch upon request.

Frequently Asked Questions

Is this solution NIST traceable?

Yes - each batch of Hanna pH 4.0 Buffer Solution is traceable to NIST standards for certified calibration accuracy.

What is the shelf life of this solution?

Unopened bottles are formulated for a five-year shelf life. Once opened, use within the timeframe indicated on the label.

Is a Certificate of Analysis available?

Yes - a COA is available by batch upon request for laboratory documentation and compliance requirements.

Why does the bottle include a temperature chart?

pH values shift slightly with temperature. The temperature chart on the label shows the expected pH value at various temperatures so you can calibrate accurately for your solution conditions.