Item no.
NIST-189c
Unit
65 g
Shipment details
No Dangerous Good
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Description
This Standard Reference Material (SRM®) is intended for use in preparing solutions for calibrating electrodes for pH measuring systems. NIST-189c Potassium Tetroxalate Dihydrate, KH3(C2O4)2?2H2O, was prepared to ensure high purity and uniformity. However, this SRM® is certified only as a pH standard, pH(S), not as a pure substance. A unit of NIST-189c consists of 65 g of potassium tetroxalate dihydrate. A solution of molality 0.05 mol/kg is recommended for the calibration of pH measuring systems /// Sample value(s) - please ask for current certificate.
Contents
Miscellaneous
Certificate of Analysis (specimen)
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Product data sheet
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NIST provides over 1300 Standard Reference Materials® as well as articles and practice guides describing the development, analysis and use of SRMs.
NIST Standard Reference Materials are used by analytical laboratories in industry, academia and government in order to facilitate commerce and trade and to advance research and development. The SRMs are produced by the engineering laboratory, the material measurement laboratory, and the physical measurement laboratory at NIST. They are available for chemical composition, physical properties, and engineering materials.