Oakton Buffer Solution, pH 1.68; 500 mL Bottles/Cs

Oakton pH buffer solutions have pH/temperature tables printed on labels for accurate calibrations (not on 60 mL, but included as insert) ; once opened, use pH 4 and pH 7 within 90 days, pH 10 within 30 days Buffer Options: - Buffer available in red - pH 1.68 pH 4.01 available in red in clear - pH 7.00 buffer available in yellow - pH 9.18 buffer available in clear - pH 10.01 buffer available in blue - pH 12.46 buffer available in clear Normalized against NIST traceable pH references for meters with 0.01 resolution. Ideal for laboratory and field analysis All Oakton pH buffers are traceable to NIST standard reference materials, the buffer solution allows you to calibrate pH instruments to ensure accuracy If unopened, shelf life is 2 years NIST/USA pH buffer value 1.68