BUFFER REFERENCE SOLUTION PH 7,01 / PH 4.01 / PH 10.01

pH Standard Buffer Solution (pH 4.01, 7.01, 10.01) for Calibration of pH Meter Electrodes, with Color Coding for Easy Identification. Traceability to NIST Standard Reference Materials.

COMPOSITION:

pH 4.01 Buffer Solution @ 25°C:

Contains: Sodium acetate (CAS No.: 127-09-3), acetic acid (CAS No.: 64-19-7), dye (red)

pH 7.01 Buffer Solution @ 25°C:

Contains: Potassium dihydrogen phosphate (CAS No.: 7778-77-0), sodium hydroxide (CAS No.: 1310-73-2), dye (yellow)

pH 10.01 Buffer Solution @ 25°C:

Contains: Potassium chloride (CAS No.: 7447-40-7), boric acid (CAS No.: 10043-35-3), sodium hydroxide (CAS No.: 1310-73-2), dye (blue)