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Hanna HI7004 pH4.01 Calibration Solution 16oz 500ml
- pH 4.01 buffer solution
- ±0.01 pH @ 25ºC-77ºF
- Hanna's Buffer solutions are made from established formulas and are standardized with a pH meter that is calibrated to NBS/NIST primary standard buffer solutions
- pH 4 buffers carry lot #, expiry date as well as pH/C chart on every bottle
- The ingredients of Hanna pH 4 buffers are Potassium Hydrogen Phthalate. They are standardized using a pH meter calibrated by primary standard buffer solutions (NIST 186 Ie, NIST 186 IIe and NIST 185g S.R.M.). The pH value is certified traceable to NIST 185g S.R.M
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