GroLine pH 4.01 Calibration Buffer (500 mL)

Ensure precise and reliable pH calibration with this high-quality pH 4.01 buffer solution. Supplied in a 500 mL bottle, it’s traceable to NIST, accurate to ±0.02 pH at 25 °C, and comes with a Certificate of Analysis. The airtight, tamper-resistant packaging protects solution integrity, and the label includes a temperature compensation chart, lot number, and expiration date for easy traceability. Crafted under stringent ISO standards using ultra-pure materials—and featuring a dye-free, color-coded design that avoids staining electrodes—this buffer remains stable and trustworthy for up to five years when unopened. Key Features High precision: ±0.02 pH accuracy at 25 °C NIST-traceable quality with Certificate of Analysis Includes temperature compensation chart for accurate calibration Airtight, tamper-proof packaging with lot and expiration labeling Dye-free, color-coded formula—safe for electrode junctions Long shelf life: up to 5 years when unopened