Tolytriazole: Corrosion Inhibitor

5-Methyl-1H-benzotriazole, also known as Tolytriazole or 5-methylbenzotriazole, is a chemical compound with the molecular formula C7H7N3. It belongs to the class of aromatic heterocyclic compounds called triazoles.

Properties:
– Molecular Formula: C7H7N3
– Molecular Weight: 133.15 g/mol
– Appearance: White to light yellow crystalline powder
– Melting Point: 79-82°C
– Boiling Point: 238-239°C

Applications:
5-Methyl-1H-benzotriazole is primarily used as a corrosion inhibitor and metal passivator. It is particularly effective in preventing the corrosion of copper and copper alloys. It forms a protective layer on the metal surface, inhibiting the oxidation process. Therefore, it finds applications in various industries, including:

1. Water Treatment: Tolytriazole is added to cooling water systems, such as in power plants or industrial cooling towers, to prevent corrosion of metal pipes and equipment.

2. Metalworking Fluids: It is used as an additive in metalworking fluids, such as cutting fluids and lubricants, to protect metal surfaces from corrosion during machining and storage.

3. Antifreeze and Engine Coolants: Tolytriazole is sometimes included in automotive antifreeze and engine coolants to prevent the corrosion of metal components in the cooling system.

4. Fuel Additives: It can be used as a corrosion inhibitor in fuels, especially those containing ethanol or biodiesel, to protect the fuel system and metal components.

5. Paints and Coatings: Tolytriazole is used as an additive in paints, coatings, and varnishes to provide corrosion protection to metal substrates.