Stearamidopropyl dimethylamine

Catalog NumberHG7651027

CAS Number7651-02-7

CategoryNon-ionic Surfactants

Synonyms

Dimethylaminopropyl stearamide;N-(3-(Dimethylamino)propyl)stearamide;Octadecanamide, N-(3-(dimethylamino)propyl)-

Molecular Weight

368.64

Molecular Formula

C23H48N2O

Appearance

Solid

Application

Use as emulsifying agent, dispersing agent.; Use as lubricant.; Use as corrosion inhibitor.

Active Content

95%

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Case Study

High-Efficiency Corrosion Inhibition of API X120 Steel Using Stearamidopropyl Dimethylamine

Radwan, A. Bahgat, et al. Journal of Molecular Liquids 236 (2017): 220-231.

This work was aimed at the evaluation of stearamidopropyl dimethylamine (SAPDA) as corrosion inhibitor for API X120 steel in extremely acidic conditions. In particular, adsorption behavior, mechanism and high-temperature high-acidity inhibition efficiency were studied.
Methods: The corrosion inhibition properties of SAPDA were assessed in a 0.5 M HCl solution across a range of temperatures using electrochemical techniques and surface analysis. Adsorption behavior was further studied by Langmuir isotherm model. Density functional theory (DFT) based quantum chemical calculations were employed to propose an inhibition mechanism. Optical profilometry was used to study surface morphology.
Key Results:
· SAPDA demonstrated outstanding inhibition efficiency, reaching 99% at a concentration of 136 μmol/L. The surfactant functioned as a mixed-type inhibitor, suppressing both anodic and cathodic reactions.
· Adsorption of SAPDA on the metal surface can be described by Langmuir adsorption isotherm, indicating mixed chemisorption and physisorption.
· Surface analysis confirmed significantly reduced roughness in SAPDA-protected samples compared to uninhibited corroded surfaces.
· Inhibition efficiency decreased with rising temperature due to accelerated metal dissolution and inhibitor desorption.
· Quantum chemical calculations suggested that the main adsorption sites of SAPDA molecule were O and N atoms, which was in agreement with the experimental data.

Ecotoxicity Assessment of Stearamidopropyl Dimethylamine

Al-Jamal, Ola, et al. Science of the Total Environment 741 (2020): 140450.

Stearamidopropyl dimethylamine (SAPDMA) is a commonly used cationic surfactant in cosmetic and conditioning agents as well as various industrial applications like corrosion inhibitors. The ecotoxicological information available for this widely used compound is rather limited. This study utilized the zebrafish embryo model to evaluate the adverse effects of SAPDMA on aquatic organisms.
Methodology: Zebrafish embryos were exposed to different concentrations of SAPDMA to determine a variety of toxicological end points, including mortality/survival (LC50), teratogenicity (NOEC), organ specific toxicity (cardiotoxicity, neurotoxicity), hematopoietic toxicity (hemoglobin using o-dianisidine staining), hepatotoxicity (ORO staining for liver steatosis and yolk retention), mitochondrial membrane potential.
Key Findings:
· The LC50 for SAPDMA was calculated as 2.3 mg/L, classifying it as "moderately toxic".
· The NOEC for general developmental parameters-including body length, yolk sac size, eye size, and spinal formation-was 0.1 mg/L.
· At the NOEC (0.1 mg/L), no significant organ-specific toxicity was observed except for hepatomegaly without functional impairment.
· At higher concentrations (0.8 mg/L), SAPDMA induced severe developmental defects in the eyes, heart, and liver.

• Synonyms: Dimethylaminopropyl stearamide;N-(3-(Dimethylamino)propyl)stearamide;Octadecanamide, N-(3-(dimethylamino)propyl)-
• Molecular Weight: 368.64
• Molecular Formula: C23H48N2O
• Appearance: Solid
• Application: Use as emulsifying agent, dispersing agent.; Use as lubricant.; Use as corrosion inhibitor.
• Active Content: 95%