Methyl-1H-benzotriazole

• CAS: 29385-43-1
• Catalog Number: ACM29385431
• Category: Main Products
• Molecular Weight: 133.15
• Molecular Formula: C₇H₇N₃
• Synonyms: TOLYTRIAZOLE; Seetec T; Tolutriazole; Stabinol MBTZ; Tolyltriazol; cobratectt100; TOLYLTRIAZOLES; tdlyltriazole; Methyl-1H-Benzotriazole
• IUPAC Name: Tolyltriazole
• Boiling Point: 289.3ºC at 760 mmHg
• Melting Point: 76-87ºC
• Flash Point: 137.4ºC
• Density: 1.273 g/cm³
• Appearance: White to off-white granules or powder
• Exact Mass: 266.12800
• Safety Description: S36-S38
• Stability: Stable. Flammable. Incompatible with strong oxidizing agents.

Case Study

Corrosion Inhibition Effect of Tolyltriazole on Mild Steel

Fathabadi, H. E., M. et al. Materials Research, 2021, 24, e20200395.

Tolyltriazole (TTA) demonstrates effective corrosion protection for copper as well as its alloys. The research investigated how TTA functions electrochemically in a 0.5 M HCl solution to further evaluate its effectiveness as a corrosion inhibitor for mild steel exposed to corrosive conditions.
Key Findings
· The electrochemical investigation shows that TTA functions as a dual corrosion inhibitor for both anodic and cathodic processes while following the Langmuir adsorption isotherm model. Higher TTA concentrations cause the open circuit potential (OCP) along with polarization curves to move to more positive potentials which boosts corrosion resistance through lower corrosion current levels.
· The physical adsorption of TTA molecules forms a stable organic layer across the metal surface which protects it from HCl corrosion.
· The XRD and AFM data demonstrate that protective amorphous films become thicker and more fully cover surfaces at higher TTA concentrations while their roughness on substrates is reduced which likely decreases corrosive Cl- adsorption according to EDS measurements.
· The application of Density functional theory (DFT) studies demonstrates that the protonated form of TTA functions as an effective corrosion inhibitor for mild steel when exposed to acidic conditions.

Synthesis and Application of Tolyltriazole-Based Nonionic Surfactants

Migahed, M. A., et al. Egyptian Journal of Petroleum, 2013, 22(1), 149-160.

Five nonionic surfactants (I-V) with varying degrees of ethoxylation were synthesized from tolyltriazole and their effectiveness as corrosion inhibitors for X-65 carbon steel in oil well formation water was assessed.
Synthesis of Tolyltriazole-Based Inhibitors
A 250 ml four-neck flask equipped with a condenser, magnetic stirrer, thermometer, and ethylene oxide gas inlet and outlet nozzles was prepared. Triethylamine (2-3 drops) was added to 1 mole of tolyltriazole (133.15 g) while stirring at 80-90 °C for approximately 15 minutes. Ethylene oxide gas was then introduced into the molten tolyltriazole under controlled pressure (86-88 cm Hg) while continuing to stir. The temperature was gradually increased to the reflux point, and the mixture was refluxed for around 3 hours. Following this, the mixture was cooled and evaporated every 0.5 hours. The progress of the reaction was monitored by weighing the increase due to the addition of ethylene oxide units.
Key Findings
The results demonstrated that the percentage inhibition efficiency (η%) increased with higher inhibitor concentrations until reaching the critical micelle concentration (CMC). Additionally, both the molecular size of the surfactant and the degree of ethoxylation contributed to improved inhibition efficiencies. Potentiodynamic polarization curves revealed that the studied inhibitors function as mixed-type inhibitors. The inhibition mechanism is attributed to the strong adsorption of the selected surfactants on the carbon steel surface, creating a protective layer that shields the surface from the aggressive environment.