Oakton 00651-00 pH Buffer, Clear, pH 4.005, 500 mL (Certified CRM)

pH buffers tested and certified for laboratory compliance.

Features:

• Certified Reference Material for compliance-controlled laboratories and facilities
• Color-coded and/or clearly labeled for easy identification in busy labs
• Supplied with calibration report from an ISO 17034 and ISO 17025 accredited laboratory
• NIST/USA buffer value of pH 7.00 traceable to NIST standard reference materials

Certified Reference Materials (CRM) meet federal, state, and local requirements, providing standardized reference calibration for pH meters. Produced in compliance with ISO/IEC 17025:2017, ISO 17034:2016, ISO Guide 31, and ISO 33405, CRMs ensure top-tier accuracy, documentation, and standards. They undergo extensive stability, transportation, and repeatability testing, with uncertainty (U) assigned from these evaluations. Calibration reports are issued by an ISO 17034 and ISO 17025 accredited lab. Environmental Express Oakton monitors the solution over 1 to 2 years and informs users of any changes.

All Oakton pH buffer solutions are manufactured under ISO 9000 quality guidelines and traceable to NIST standard (for meters with 0.01 resolution). A pH/temperature table is printed on the label for accurate calibrations. 

For more information, please see SDS