Buffer Solution, pH 1.68; 5 x 60 mL Bottles/Pk

Ideal for laboratory and field analysis|All Oakton pH buffers are traceable to NIST standard reference materials Buffer solution lets you calibrate pH instruments to ensure accuracy If unopened, shelf life is 2 years|NIST/USA buffer value of pH 1.68|? Oakton pH Buffer Solutions have pH/temperature tables printed on the labels for accurate calibrations (not on 60-mL, but included as insert) ? Manufactured under ISO 9000 quality guidelines and traceable to NIST standards ? If unopened, shelf life is 2 years; once opened, use pH 4 and pH 7 within 90 days, pH 10 within 30 days ? Buffer Options: - pH 1.68 buffer available in clear - pH 4.01 buffer available in red - pH 6.86 buffer available 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|Convenient 60-mL bottles come in a pack of five?ideal for field use. Grab one when you're on the go! Standardized against NIST-traceable pH references for meters with 0.01 resolution.