Oakton 00654-00 Buffer Solution, pH 4.01, 500 mL

Calibrate pH instruments to ensure accuracy. Ideal for laboratory and field analysis.

Features:

• 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
• 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

Standardized against NIST-traceable pH references for meters with 0.01 resolution. Store buffers away from direct sunlight.