Hanna calibration buffers have the lot number and expiry date clearly marked on the label. All bottles are air tight with a tamper-proof seal to ensure the quality of the solution. Hanna’s line of technical calibration buffers have been specially formulated to have an expiry of 2 years from the date of manufacture for an unopened bottle.

Hanna Groline Calibration Solution Key Features:

• Specially formulated to have an expiry date of 2 years from manufacture for an unopened bottle
• Accuracy of ±0.02 pH @ 25°C
• Supplied with a Certificate of Analysis
• Temperature chart of the actual pH value at various temperatures printed on each bottle