BUFFER SOLUTION (di-sodium tetraborate), traceable to SRM from NIST and PTB pH 9.22 (20°C) Certipur®

CAS Number: 1016451000
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Description Buffer solution (di-sodium tetraborate), traceable to SRM from NIST and PTB pH 9.22 (20C) Certipur(R)
MDM Code 1016451000
Material Number 1.01645
Business Unit 533
Shipping Mode ASC
CAS Number 1016451000


General description

The ready-to-use Certipur® buffer solutions are prepared gravimetrically in our ISO/IEC 17025 accredited calibration laboratory from high-purity salts, acids and bases diluted in high-purity water. All balances are regularly calibrated with analytical weight sets traceable to primary standard reference materials from NIST and PTB. The pH value is measured to the highest precision using a combined glass electrode after 5-point calibration (according to DIN 19268) against reference buffer solutions (according to DIN 19266, IUPAC, NIST, Ph.Eur. and USP).


Certipur® buffer solution (di-sodium tetraborate buffer; pH 9.22 at 20 °C) is intended for use as a calibration standard for pH instruments or pH electrodes or as a control sample for measuring the pH value.


1 l in Plastic bottle

Features and Benefits

The product is delivered with a comprehensive, batch-specific Certificate of Analysis showing the relevant data for the quality management system. It is a Certified Reference Material (CRM) offered in solution format. Intended for extremely precise calibration, qualification and monitoring of pH instruments and for testing other buffer solutions.

Legal Information

CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany


Signal Word


WGK Germany

Flash Point (F)

Flash Point (C)

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Risk Statement

Supplemental Hazard Statements


Certificate of Analysis View Sample COA
Certificate of Origin


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