25x M10004B is a lab grade pH 4.01 buffer solution certified to meet the standard to an accuracy of ±0.01 pH removing the inaccuracies involved with mixing calibration solutions from powder.
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25x M10004B is a lab grade pH 4.01 buffer solution certified to meet the standard to an accuracy of ±0.01 pH removing the inaccuracies involved with mixing calibration solutions from powder.