Hanna Instruments HI7004/1L pH 4.01 Calibration Solution (1 L)
The HI7004/1L pH 4.01 calibration solution is of high quality and has been dyed red for easy buffer identification. Hanna calibration buffers are airtight with a tamper-proof seal and have the lot number and expiration date clearly marked on the label to ensure the quality of the solution. Hanna’s calibration buffers have been specially formulated to have an unopened bottle expiration date of 5 years from the date of manufacture.
- pH accuracy of +/- 0.01 at 25°C
- Each bottle has a temperature chart with the actual pH value at various temperatures printed on it.
- Airtight Sealing