Sodium laurate

Catalog Number	ACM629254-2
CAS	629-25-4
Structure
Synonyms	Lauric acid sodium salt
IUPAC Name	Sodium;dodecanoate
Molecular Weight	222.3
Molecular Formula	C12H23NaO2
Canonical SMILES	CCCCCCCCCCCC(=O)[O-].[Na+]
InChI	InChI=1S/C12H24O2.Na/c1-2-3-4-5-6-7-8-9-10-11-12(13)14;/h2-11H2,1H3,(H,13,14);/q;+1/p-1
InChI Key	BTURAGWYSMTVOW-UHFFFAOYSA-M
Melting Point	310 °C
Purity	97%+
Complexity	138
Covalently-Bonded Unit Count	2
Defined Atom Stereocenter Count	0
Exact Mass	222.15957425
Heavy Atom Count	15
Hydrogen Bond Acceptor Count	2
Hydrogen Bond Donor Count	0
Monoisotopic Mass	222.15957425
Physical State	Powder
Rotatable Bond Count	10
Topological Polar Surface Area	40.1 Ų

Knowledge & Learning Case Study Q&A

Sodium Laurate for the Preparation of Modified TiO₂ Nanoparticle-coated Chitosan/WPI Membranes

Zhang W, et al. Carbohydrate Polymers, 2026, Volume 138, 59-65.

Sodium laurate can be utilized to modify TiO₂ nanoparticles, which are then incorporated into chitosan/whey protein membranes to enhance the compatibility of whey protein with chitosan. This modification also improves the mechanical properties of the membranes and reduces their water vapor permeability.
Preparation of Sodium Laurate-Modified TiO₂ Nanoparticles:
To prepare the modified TiO₂ nanoparticles, 5 grams of TiO₂ nanoparticles were gently dispersed in 70 mL of deionized water. The pH of the suspension was adjusted to 5 using 1 mol/L HCl and 1 mol/L NaOH, followed by the addition of 0.75 grams of sodium laurate. The mixture was magnetically stirred at 40°C for 30 minutes. The resulting modified TiO₂ nanoparticles were washed three times with distilled water using a centrifuge at 5000 rpm, with the supernatant discarded after each wash. Finally, the nanoparticles were dried at 105°C.
Film Preparation:
To prepare the films, 1.5 grams of chitosan, 0.01 grams of sodium laurate-modified TiO₂ nanoparticles, and 1.5 mL of glycerin were added to 50 mL of 0.2 mol/L acetic acid and magnetically stirred for 2 hours. Separately, 0.5 grams of milk whey protein isolate (WPI) was carefully dispersed in 50 mL of deionized water. The chitosan/WPI/sodium laurate-modified TiO₂ nanoparticle composite film (CWTF) stock solution was prepared by combining these two solutions, with the acidity adjusted to pH 3 using 6 mol/L HCl. The mixture was stirred at 60°C for 30 minutes and then degassed under vacuum for 2 hours. Afterward, 30 mL of the stock solution was cast onto a plastic petri dish and dried in an oven at 60°C for 16 hours. The resulting film was carefully peeled off the plates and stored for 48 hours in a desiccator containing saturated MgSO₄ solution at 50% relative humidity (RH) and 25°C until use.

Sodium Laurate as a Capping Agent to Synthesize CeO₂ Nanoparticles

Wu H, et al. Applied Catalysis A: General, 2021, 628, 118404.

Sodium laurate (SL) can serve as a capping agent in the synthesis of CeO₂ nanoparticles (NPs) with various morphologies and sizes, which are effective catalysts for room temperature cyanosilication reactions. The resulting polyhedron-shaped CeO₂ NPs exhibit abundant oxygen defects and numerous Lewis/Brönsted acid sites, leading to outstanding catalytic performance.
Preparation of Polyhedron-Shaped CeO₂ NPs (10 nm):
To prepare the 10 nm polyhedron-shaped CeO₂ NPs, 5.4 g of Ce(NO₃)₃·6H₂O was dissolved in 45 mL of deionized water to serve as the cerium precursor. In a separate container, 0.6 g of SL was dissolved in 5 mL of deionized water at 40°C under vigorous stirring. The cerium precursor solution was then added to a flask containing 15 mL of 3.12 M NH₃·H₂O aqueous solution, maintained at 70°C with continuous stirring. Subsequently, 0.3 wt% H₂O₂ was added dropwise to the mixture to oxidize the products, during which the purple precipitate (Ce (III)) gradually turned yellow (Ce (IV)). The SL solution was then poured into the flask, and the reaction was allowed to proceed for 1 hour at 70°C under stirring. The resulting polyhedron-shaped CeO₂ NPs (P-CeO₂ NPs-10 nm) were washed twice with ethanol and centrifuged at 6000 rpm. The as-prepared CeO₂ NPs can be dispersed in nonpolar solvents such as heptane, benzene, and dichloromethane to form stable nanodispersions.

Application of Sodium Laurate for Superhydrophobic Surface Modification

Wang F, et al. Construction and Building Materials, 2021, 278, 122385.

A novel method using sodium laurate for rapidly fabricating superhydrophobic surfaces on hardened cement paste (HCP) was developed. This method was selected due to sodium laurate's excellent water solubility and significant hydrophobic modification capabilities, making it an ideal modifier for this purpose. This rapid, cost-effective, and environmentally friendly method can be applied to various cement types, including aluminous and sulfoaluminous cement.
Methodology:
In this study, sodium laurate was used to modify the surface of ordinary Portland cement-based HCP, resulting in superhydrophobic properties. The process involved immersing the HCP samples in a 1 wt% aqueous solution of sodium laurate for just 5 seconds at room temperature. Prior to modification, the HCP surface was ground with 240# sandpaper to facilitate the contact angle test. After immersion, the modified samples were air-dried naturally.
Results:
The sodium laurate-treated HCP surface exhibited a water contact angle (CA) of 154.3° and a sliding angle of 8.7°, indicating strong superhydrophobicity. Additionally, the capillary water absorption coefficient and water absorption rate of the modified HCP decreased by 63.81% and 97.77%, respectively, compared to untreated samples. The method also allowed for the creation of colored superhydrophobic HCP surfaces using pigments or dyes, enhancing decorative effects.

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