Environmental Express Oakton CERTIFIED pH CRM Buffer, Red, pH 4; 500 mL

Environmental Express Oakton CERTIFIED pH CRM Buffer, Red, pH 4; 500 mL

The Oakton CERTIFIED pH CRM Buffer is a Certified Reference Material (CRM) designed for compliance-controlled laboratories and facilities that require traceable, documented calibration standards. This red-colored pH 4 buffer provides accurate acidic-range calibration for pH meters while supporting regulatory compliance, quality assurance programs, and standardized testing procedures.

Key Features

• Certified Reference Material (CRM) for compliance-driven laboratory and industrial environments.
• Provides standardized reference calibration for pH meter verification and calibration.
• Supplied with a calibration report from an ISO 17034 and ISO 17025 accredited laboratory.
• Red-colored solution allows quick visual identification in busy laboratory settings.
• NIST/USA buffer value of pH 4.005 traceable to NIST standard reference materials.

More About This Item

Certified Reference Materials (CRMs) help laboratories meet federal, state, and local regulatory requirements by providing traceable and standardized calibration references for pH measurement systems. Produced in compliance with ISO/IEC 17025:2017, ISO 17034:2016, ISO Guide 31, and ISO 33405 requirements, these buffers provide exceptional accuracy, documentation, and confidence in calibration results.

Each CRM undergoes extensive stability, transportation, repeatability, and uncertainty testing before certification. Calibration reports are issued by an ISO 17034 and ISO 17025 accredited laboratory, ensuring documented traceability for quality systems, audits, and regulatory compliance. Environmental Express Oakton continuously monitors product stability and communicates any significant changes to users.

pH 4 is one of the most commonly used acidic calibration points for pH meters. All Oakton pH buffer solutions are manufactured under ISO 9000 quality guidelines and are traceable to NIST standards for meters with 0.01 pH resolution. A pH/temperature reference table is printed on the product label to support accurate calibrations across varying temperatures. The buffer is available in both clear and color-coded formulations for easy identification.

When stored unopened and away from direct sunlight, the buffer has a shelf life of up to 2 years from the date of manufacture.

Specifications

• Catalog Number: 00651-06
• Product Type: CERTIFIED pH CRM Buffer
• Buffer Value: pH 4.005
• Color: Red
• Volume: 500 mL
• Traceability: NIST Traceable
• Compliance: ISO/IEC 17025:2017, ISO 17034:2016, ISO Guide 31, ISO 33405
• Description: Environmental Express Oakton CERTIFIED pH CRM Buffer, Red, pH 4; 500 mL
• Shelf Life: 2 years unopened