Benzotriazole and tolyltriazole for yellow-metal corrosion control, from North American stock. Solid 99% granular and sodium-salt liquid grades for cooling water, coolants, metalworking fluids, VCI packaging, and metal finishing.
Benzotriazole and tolyltriazole are azole corrosion inhibitors that protect copper, brass, bronze, and other yellow metals. They are the standard chemistry for yellow-metal passivation in water-treatment and fluid-formulation work.
Both molecules bond to a copper surface and build a thin protective film. The film blocks the corrosive species, mainly chloride and sulfate, from reaching the metal, and it holds at very low dose rates. The surface ends up passivated, which means it resists pitting, tarnish, and the copper dissolution that feeds galvanic attack elsewhere in a system.
P.A.T. Products supplies and stocks benzotriazole and tolyltriazole corrosion inhibitors for North American industry, in both solid granular and liquid sodium-salt forms. The two products cover the same job. The choice between them, and between solid and liquid, comes down to the system they go into.
Benzotriazole, BTA, CAS 95-14-7, molecular formula C6H5N3, is the base yellow-metal inhibitor. It protects copper and copper alloys by forming an insoluble copper-azole film on the metal surface.
We stock benzotriazole in two forms: solid 99% granular (the fine-granular grades), a high-purity dry product for formulators who dose a powder or dissolve their own concentrate; and sodium benzotriazole liquid (CAS 15217-42-2), the water-soluble sodium salt supplied as a liquid for systems that meter a ready-to-use solution. Benzotriazole dissolves cleanly and is a common choice for water-based coatings and inks, mild closed-loop cooling systems, and silver and copper protection.
Pack codes such as "25" and "55" are pack sizes, a 25 kg bag and a 55 lb bag (about 25 kg), of the same 99% granular product. They are not different grades.
Tolyltriazole, TTA, CAS 29385-43-1, is a methyl-substituted benzotriazole supplied as a mixture of the 4- and 5-methylbenzotriazole isomers. The added methyl group on the ring changes how the inhibitor behaves in service.
Tolyltriazole is often chosen over benzotriazole when the system runs hot or carries an oxidizing biocide. It holds up better against chlorine and other halogen disinfectants and stays effective at higher operating temperatures, so it is common in cooling water with active chlorination, in engine coolant and antifreeze, and in long-life, high-temperature fluids.
We stock tolyltriazole as solid 99% and as sodium tolyltriazole liquid (CAS 64665-57-2), the sodium salt that is more soluble and easier to meter in many water-based systems. As with benzotriazole, the "25" and "55" pack codes are pack sizes of the same product, not separate specifications.
Benzotriazole and tolyltriazole both come two ways: a solid 99% granular, and a sodium-salt liquid. The active chemistry is the same. The form decides how you handle and dose it.
Solid granular is the high-purity dry product. It ships and stores compactly, and it suits formulators who dissolve their own concentrate or add a powder to a dry blend. The sodium-salt liquids, sodium benzotriazole and sodium tolyltriazole, are the water-soluble salts supplied ready to meter. They go straight into water-based formulations and into systems built around liquid feed, with no dissolving step. Tell us how you dose, and we will recommend the form that fits your process.
Two related metal-passivation chemistries sit alongside the triazoles for specific jobs. 2-mercaptobenzothiazole (MBT, CAS 149-30-4) is a sulfur-bearing inhibitor for copper and other non-ferrous metals. It forms an insoluble film on the metal and is used in cooling water and metalworking fluids, on its own or alongside a triazole. A 1,3,4-thiadiazole (DMTD-type) is a dithiol heterocycle used as a copper and yellow-metal deactivator, mainly in lubricants, greases, and severe-duty metalworking fluids where extreme-pressure performance and metal protection are both needed.
These are specialty additions, not the volume of the line. If your formulation calls for MBT or a thiadiazole deactivator, ask and we will tell you what we can supply.
Yellow-metal passivation in open recirculating and closed-loop cooling systems. BTA and TTA protect copper and brass against chloride and sulfate attack, with TTA favored where chlorine biocide is in use.
Cooling-water corrosion control →Copper and yellow-metal protection in soluble-oil, semi-synthetic, and synthetic metalworking fluids. Triazoles and MBT keep nonferrous components from corroding in the sump and on the part.
Metalworking fluids & VCI →Benzotriazole protects copper and brass in VCI papers and films, preserving bright metal surfaces through transport and storage.
Tolyltriazole guards copper, brass, and solder in coolant and antifreeze formulations that run hot and last for years.
Yellow-metal protection in hydraulic fluids, gear oils, and other industrial fluids where copper attack would degrade the fluid and the equipment.
Surface treatment and anti-tarnish for copper, brass, and silver in plating and metal-finishing lines.
Benzotriazole's anti-tarnish action keeps silver and copper surfaces bright, in both solution and packaging applications.
Benzotriazole's clean solubility makes it a common copper inhibitor and stabilizer in water-based coatings and inks.
P.A.T. Products holds benzotriazole and tolyltriazole inventory in North American warehouses and ships across the United States, Canada, and Mexico. Solid granular and liquid sodium-salt grades ship from stock, and samples typically go out the same business day. For commercial volumes we also arrange direct container shipments.
Technical Data Sheets and Safety Data Sheets are available for every grade. A Certificate of Analysis ships with each lot, and we can provide additional documentation, including REACH statements, on request. If you are qualifying a second source or moving off another supplier's inhibitor, we can match by product, form, and pack size. Cross-references to commonly specified grades are available on request.
Both are azole corrosion inhibitors that protect copper, brass, and other yellow metals by forming a protective film on the surface. Tolyltriazole (TTA) is benzotriazole (BTA) with a methyl group added to the ring, supplied as a 4-/5-methylbenzotriazole mixture. That methyl group gives tolyltriazole better thermal stability and better resistance to chlorine and other halogen biocides, so it is often chosen for hot systems and for cooling water under active chlorination. Benzotriazole dissolves cleanly and is common in mild closed-loop systems, water-based coatings and inks, and silver and copper protection.
They protect yellow metals: copper, brass, bronze, and copper alloys. Both also give anti-tarnish protection to silver. The inhibitor film suppresses copper dissolution, which also helps protect mild steel elsewhere in a system by reducing the copper plating that drives galvanic corrosion.
The active chemistry is the same. Solid 99% granular is the high-purity dry product, suited to formulators who dissolve their own concentrate or add a powder to a dry blend. The liquid grades are the sodium salts, sodium benzotriazole and sodium tolyltriazole, supplied water-soluble and ready to meter into water-based formulations and liquid-feed systems.
No. Those are pack sizes. A "25" is a 25 kg bag and a "55" is a 55 lb bag, which is about 25 kg, of the same 99% granular product. They are not different specifications.
Yes. We also supply 2-mercaptobenzothiazole (MBT), a sulfur-bearing inhibitor for copper and other non-ferrous metals used in cooling water and metalworking fluids, and a 1,3,4-thiadiazole (DMTD-type) deactivator used mainly in lubricants, greases, and severe-duty metalworking fluids. Tell us your formulation and we will tell you what we can supply.
Yes. Samples of benzotriazole and tolyltriazole, in solid or liquid form, typically go out the same business day. Technical Data Sheets and Safety Data Sheets are available for every grade, a Certificate of Analysis ships with each lot, and we can provide additional documentation, including REACH statements, on request.
