Hanna Standard Calibration Buffer Solution, HI7004L, 4.01 pH, 500ML

Hanna Standard Calibration Buffer Solution is a premium quality pH 4.01 calibration solution. 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 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 deg.C
• Temperature chart of the actual pH value at various temperatures printed on each bottle
• Air tight bottle with tamper-proof seal
• Each bottle marked with lot number and expiration date
• Easy to identify different buffer values
• Solution does not contain any dyes that may stain the reference cell of a pH electrode