HI7004L is a premium quality pH 4.01 calibration solution that is NIST traceable and supplied with a Certificate of Analysis. Hanna calibration buffers 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 has been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened bottle.
Air-tight bottle with tamper-proof seal
- Ensures quality and freshness of solution
Each bottle is marked with the lot number and expiration date.
- Hanna buffers are specially formulated to have an expiration of 5 years from manufacture for an unopened bottle.
Color-coded label for easy pH buffer value identification
- Easy to identify different buffer values
- The solution does not contain any dyes that may stain the reference cell of a pH electrode