Buffers traceable to IUPAC/NIST pH scale.

• For calibration of pH meters
• Accuracy at 25 °C: ±0.010 or ±0.05 (pH 12.45)

Each standard is delivered in an airtight package ensuring safe storage. The nominal value of the pH standard is guaranteed until first opening, certified value is guaranteed for two years from the date of issue of the certificate.