Hanna Instruments Non-Standard pH Buffer Solutions have the lot number and expiration date clearly marked on the label and are air-tight with a tamper-proof seal to ensure the quality of the solution. Hanna’s line of calibration buffers have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened bottle.
- Color-coded label for easy pH buffer value identification
- Accuracy of ±0.01 pH @ 25°C
- Temperature chart of the actual pH value at various temperatures printed on each bottle
- Air-tight bottle with tamper-proof seal to ensure quality