Product Review

Oakton pH buffer bottles have pH/temperature tables printed on the labels for accurate calibrations 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 store buffers away from direct sunlight. Color coded for quick visual reference: - pH 4.01 buffer in red - pH 7.00 buffer in yellow - pH 10.01 buffer in Blue the most common "USA" pH calibration buffer values—in one convenient Pack! save over 25 percent on Pack compared to ordering separately all Oakton pH buffers are traceable to NIST standard reference materials buffer solutions help you calibrate pH instruments to ensure accuracy If unopened, shelf life is 2 years.