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1.11584 Supelco

Sodium hydroxide solution

c(NaOH) = 4 mol/l (4 N) Titripur®



Related Categories Analytical Reagents, Analytical/Chromatography, Titration, Volumetric Titration Reagents
Agency/Method   ISO 17025
Quality Level   100
vapor pressure   3 mmHg ( 37 °C)
form   liquid
reaction suitability   reaction type: Acid-base reactions
concentration   4 M
application(s)   titration: suitable
pH   14 (20 °C in H2O)
density   1.15 g/cm3 at 20 °C
SMILES string   [OH-].[Na+]
InChI   1S/Na.H2O/h;1H2/q+1;/p-1
storage conditions   Store at +15°C to +25°C.


Analysis Note

Form: liquid
Amount-of-substance concentration: 3,980-4,020
Measurement uncertainty: + / - 0,012
Traceability: NIST SRM
The concentration is determined by volumetric titration and refers to 20°C.
The certified value of this volumetric solution was determined with hydrochloric acid standard solution (article number 1.09057). The hydrochloric acid standard solution is standardized and traceable to a primary standard from the National Institute of Standards and Technology, Gaithersburg, USA (NIST SRM 723 Tris(hydroxymethyl)aminomethane) by means of volumetric standard Tris(hydroxymethyl)aminomethane (Art. 1.02408). This volumetric standard is certified by the accredited calibration laboratory of Merck KGaA, Darmstadt, Germany according to DIN EN ISO 17025. The uncertainty is expressed as expanded measurement uncertainty with a coverage factor k=2 covering a confidence level of 95%. All measurements are carried out in the accredited calibration laboratory of Merck KGaA, Darmstadt, Germany.
Note: The titer is a correction factor to correct for variations of the volumetric solution, the titration equipment, the temperature and other laboratory conditions. For correct titration results it is recommended to determine a titer with the laboratory specific equipment and under laboratory specific conditions directly after opening a new bottle and at regular time intervals.

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