Application
- Adsorption
Studies: Sodium hydroxide solution is used in treating polymer
adsorbents to enhance their adsorption properties. A recent study
investigated the effect of treating a PVC/Aliquat-336 polymer adsorbent
with sodium hydroxide on chromium (VI) adsorption. The treatment improved
the adsorption capacity of the polymer, making it more effective in
removing heavy metals from aqueous solutions (Ouazine et al.,
International Journal of Environmental Analytical Chemistry, 2022).
- Synthesis
of Sodium Ethoxide: Sodium hydroxide solution is employed in the
synthesis of sodium ethoxide, an important reagent in organic synthesis.
Research has demonstrated that sodium ethoxide can be synthesized
efficiently at ambient temperature using sodium hydroxide and ethanol-90.
This method offers a straightforward and cost-effective approach for
preparing this key chemical intermediate (Randriana et al.,
World Journal of Applied Chemistry, 2021).
- Corrosion
Inhibition: Sodium hydroxide solution is used in corrosion inhibition
studies. Research has shown that an aqueous extract of Thespesia populnea
plant leaves can effectively inhibit the corrosion of aluminum steel in
sodium hydroxide solution. The study utilized electrochemical techniques
to demonstrate the formation of a protective film on the steel surface,
highlighting the potential of natural inhibitors in industrial
applications (Brindha
and Venkatraman, Research Journal of Chemistry and Environment, 2023).
Features and Benefits
Accreditation:
This volumetric solution is analyzed by our calibration laboratory
D-K-15185-01-00 which is accredited according to DIN EN ISO/IEC 17025 for
analysis of amount-of-substance concentrations in volumetric solutions by DAkkS
(Deutsche Akkreditierungsstelle - German National Accreditation Body). The
accreditation certificate can be found at www.sigmaaldrich.com/ISO17025.
Packaging
SKU-pack size numbers ending with a "3" are
SmartChemicals with an RFID tag on the label for seamless data transfer to the
instrument, e.g. xxxxxx1003 or xxxxxxx 4003. More information on www.sigmaaldrich.com/SmartChemicals
Titripac® packaging - all SKU-pack size numbers ending
"4000, 4003, 9010, 9013" - more information on www.sigmaaldrich.com/Titripac
Analysis Note
Form liquid
Amount-of-substance concentration 0.0995 - 0.1005 mol/L
Measurement uncertainty ± 0.0003 mol/L
Traceability NIST SRM
The concentration is determined by volumetric titration and refers to 20°C.
The amount-of-substance concentration of this volumetric solution is traceable
to a primary standard reference material (SRM) from the National Institute of
Standards and Technology, Gaithersburg, USA (NIST SRM 84 potassium hydrogen
phthalate) by means of volumetric standard potassium hydrogen phthalate (article
number 1.02400), certified reference material according to ISO 17034, analyzed
by our accredited calibration laboratory of Merck KGaA, Darmstadt, Germany
according to DIN EN ISO/IEC 17025. The uncertainty is expressed as expanded
measurement uncertainty with a coverage factor k=2 covering a confidence level
of 95%.
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.
Legal Information
Titripac is a registered trademark of Merck KGaA, Darmstadt,
Germany
Titripur is a registered trademark of Merck KGaA, Darmstadt,
Germany
