4.01 pH Buffer Solution 3 @ 20 mL# 70004P
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Three 20 mL sachets of pH 4.01 calibrating buffer solution.
Hanna's buffer solutions are made from established formulas and are standardized with a pH meter that is calibrated to the NIST primary standard buffer solutions
These 20 mL sachets are ideal for infrequent calibrations. Printed on each sachet is a pH / Temperature chart as well as the lot # and expiration date.
This buffer is an aqueous solution of hydrogen phthalate.
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