Sodium Methyl Stearoyl Taurate

Catalog Number

ACM149393-1

CAS

149-39-3

Structure

IUPAC Name

Sodium;2-[methyl(octadecanoyl)amino]ethanesulfonate

Synonyms

Sodium 2-(methyl(1-oxooctadecyl)amino)ethanesulfonate

Molecular Weight

427.62

Molecular Formula

C21H42NNaO4S

Canonical SMILES

CCCCCCCCCCCCCCCCCC(=O)N(C)CCS(=O)(=O)[O-].[Na+]

InChI

UKSFMDODPANKJI-UHFFFAOYSA-M

InChI Key

InChI=1S/C21H43NO4S.Na/c1-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-21(23)22(2)19-20-27(24,25)26;/h3-20H2,1-2H3,(H,24,25,26);/q;+1/p-1

Active Content

85%

Physical State

Solid

Typical Applications

Use as cleansing agent.
Use as foaming agent.
Use as emulsifying agent, dispersing agent.

MSDS

Download MSDS

COA

Download COA

Spec Sheet

Download Spec Sheet

Case Study

Sodium Methyl Stearoyl Taurate for Foam Stabilization in High-Ethanol Systems

Sodium Methyl Stearoyl Taurate for Foam Stabilization in High-Ethanol Systems Sakai, Kenichi, et al. Chemistry Letters 51.10 (2022): 982-984.

Sodium methyl stearoyl taurate (SMT), an anionic surfactant commonly used in personal care formulations, has been investigated for its ability to stabilize foam in aqueous ethanol solutions with a high ethanol content (60 vol.%). Foam stability in such systems is crucial for the development of effective disinfectant formulations, as ethanol-rich environments typically hinder foam formation.
A study examined the synergistic effects of SMT with long-chain alcohols (CnOH) and inorganic electrolytes on interfacial film properties. The addition of electrolytes reduced surface tension and increased surface viscosity, leading to improved foam stability. When SMT was combined with 1-dodecanol (C12OH) or 1-tetradecanol (C14OH), precipitation was prevented, and enhanced foaming was observed, even under high ethanol concentrations. The foam stability was positively correlated with the increasing chain length of CnOH, highlighting the role of hydrophobic interactions in stabilizing the foam structure.
Notably, the study demonstrated that stable foaming could be achieved without fluorocarbon- or silicone-based surfactants, making SMT a viable alternative for environmentally friendly formulations. These findings suggest that SMT can serve as a key component in high-ethanol foam-based disinfectants, providing enhanced stability and performance.
By optimizing SMT-based surfactant systems, manufacturers can develop more effective and sustainable disinfectant foams for applications requiring prolonged surface contact in ethanol-rich environments.

Sodium Methyl Stearoyl Taurate in α-Crystalline Phase Formation and Water Structuring

Sodium Methyl Stearoyl Taurate in α-Crystalline Phase Formation and Water Structuring Watanabe, Kei, et al. Journal of Oleo Science 61.1 (2012): 29-34.

Sodium methyl stearoyl taurate (SMT), an anionic surfactant commonly used in cosmetic and pharmaceutical formulations, plays a crucial role in α-crystalline phase formation when combined with behenyl alcohol in aqueous systems. The structural and physicochemical properties of these α-gels are highly dependent on the alcohol-to-surfactant ratio and water concentration.
Studies have demonstrated that SMT, at an optimal behenyl alcohol/SMT molar ratio of 3:1, forms a stable α-crystalline phase, characterized by its ability to incorporate water molecules within its interlayer. Below the solubilization limit of 85% water, the system remains a single-phase α-gel, with "slow water" diffusing within the interlayer. Beyond this limit, excess water leads to phase separation, creating a multi-phase system with coexisting hydrated SMT and behenyl alcohol crystals. The transition from one-phase to multi-phase was confirmed using Fourier transform pulsed gradient spin echo NMR spectroscopy, revealing distinct diffusion coefficients for intercalated and trapped water molecules.
These findings highlight SMT's functional versatility in structuring water within surfactant-alcohol gel systems, making it an essential component for designing stable formulations in personal care, drug delivery, and controlled-release applications. The ability to modulate water behavior at the molecular level further enhances its value in advanced material science and colloidal chemistry.

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