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Hanna HI70004P 20 ML 25 Pack 4.01 pH Calibration Solution
Hanna buffer solutions are prepared according to precise formulas and are standardized with a pH meter calibrated according to the NIST standards.
The 20 mL sachets are single-dose whereas, for more demanding applications, you may choose between packages of 230 mL, 500 mL, 1 Liter or 1 Gallon (3.78 L).
All pH 4 solutions show batch number, expiration date and the correlation table between pH and temperature. HI 5004, HI 6004, HI 7004L/C, HI 8004L/C and HI 70004C are supplied complete with certificate of analysis.
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