1x5Lt XS buffer solution pH 4,01 ± 0,01 / 25°C red color with N.I.S.T certificate 51100233

XS Green Line buffer solutions, with N.I.S.T traceability, in bottle with built-in dispenser with calibration compartment.

- pH 4.00 ± 0.01 / 25 ° C. Red. 5000ml (5 lt).