1.05590

Sodium hydroxide solution about 32%

(for the determination of nitrogen) for analysis EMSURE^®

• Synonym(s): Sodium hydroxide solution
• Linear Formula: NaOH
• CAS Number: 1310-73-2
• Molecular Weight: 40.00
• MDL number: MFCD00003548
• UNSPSC Code: 12352305
• NACRES: NA.21

Properties

• vapor pressure: 3 mmHg ( 37 °C); 8 hPa ( 20 °C)
• Quality Level: 300
• product line: EMSURE^®
• pH: 14 (20 °C in H₂O)
• mp: 9 °C
• density: 1.35 g/cm³ at 20 °C
• storage temp.: 15-25°C
• SMILES string: [OH-].[Na+]
• InChI: 1S/Na.H2O/h;1H2/q+1;/p-1
• InChI key: HEMHJVSKTPXQMS-UHFFFAOYSA-M

Description

Application

• Long-term durability of discarded cork-based composites obtained by geopolymerization.: This study utilizes a 32% sodium hydroxide solution to enhance the geopolymerization of discarded cork-based composites, demonstrating its effectiveness in improving long-term durability and environmental sustainability of building materials (Poggetto GD et al., 2024).


• Lactose-6-phosphate as an alternative to disodium phosphate in the production of processed cheese food.: Research highlights the application of a 32% sodium hydroxide solution in dairy processing, specifically in adjusting pH to optimize the use of lactose-6-phosphate as a stabilizer in processed cheese, showcasing its potential in food science (Alsaleem KA et al., 2024).


• Production of chitosan from shrimp shell using ultrasound followed by subcritical water hydrolysis.: This publication discusses the use of a 32% sodium hydroxide solution in the extraction and purification of chitosan from shrimp shells, using advanced techniques like ultrasound and subcritical water hydrolysis, underscoring its crucial role in biopolymer production (Matouri M et al., 2024).


• [Determination of boric acid and silicic acid in mineral water by nonsuppressed ion chromatography].: The use of a 32% sodium hydroxide solution is explored for the ion chromatographic analysis of boric and silicic acids in mineral water, reflecting its importance in analytical chemistry and environmental monitoring (Yang Z et al., 2023).


• Lanthanum and magnesium activated palygorskite for adsorption of phosphate in piggery wastewater.: This research employs a 32% sodium hydroxide solution to activate palygorskite for phosphate adsorption in wastewater treatment, demonstrating its effectiveness in improving water treatment technologies (Zhang X et al., 2023).

Analysis Note

Assay (acidimetric,NaOH): ≥ 32.0 %
Carbonate (as Na₂CO₃): ≤ 0.2 %
Chloride (Cl): ≤ 0.004 %
Phosphate (PO₄): ≤ 0.0005 %
Silicate (SiO₂): ≤ 0.001 %
Sulfate (SO₄): ≤ 0.003 %
Total nitrogen (N): ≤ 0.0001 %
Heavy metals (as Pb): ≤ 0.0005 %
Al (Aluminium): ≤ 0.0005 %
Fe (Iron): ≤ 0.0005 %

Legal Information

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

Safety Information

• pictograms: GHS05
• signalword: Danger
• hcodes: H290 - H314
• pcodes: P234 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P363
• Hazard Classifications: Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1A
• Storage Class: 8B - Non-combustible, corrosive hazardous materials
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable