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Cobratec 99 is a heterocyclic compound widely known for its powerful corrosion-inhibiting properties, especially for copper and its alloys.
Cobratec 99 forms a thin, protective layer on metal surfaces by strongly binding to the metal, preventing oxidation and degradation in harsh environments.
Cobratec 99 is extensively used in industries such as electronics, automotive, and metallurgy, as well as in coolants, lubricants, and polymer stabilization.
CAS Number: 95-14-7
EC Number: 202-394-1
Chemical Formula: C6H5N3
Molecular Weight: 119.12
Synonyms: 1H-Benzotriazole, Benzotriazole, 95-14-7, 1,2,3-BENZOTRIAZOLE, 1H-Benzo[d][1,2,3]triazole, 2H-Benzotriazole, Azimidobenzene, 1H-1,2,3-Benzotriazole, Aziminobenzene, Benztriazole, Benzisotriazole, Benzene azimide, Cobratec #99, 2,3-Diazaindole, 1,2-Aminoazophenylene, 273-02-9, 1,2,3-Triazaindene, Pseudoazimidobenzene, 2H-benzo[d][1,2,3]triazole, Cobratec 99, 1,2,-Aminozophenylene, 1,2,3-Triaza-1H-indene, Cobratec 35G, NSC-3058, 1,2,3-1h-benzotriazole, Verzone Crystal, NCI-C03521, Kemitec TT, Rusmin R, Seetec BT, 27556-51-0, CCRIS 78, DTXSID6020147, U-6233, CHEBI: 75331, HSDB 4143, EINECS 202-394-1, MFCD00005699, UNII-86110UXM5Y, BRN 0112133, AI3-15984, 86110UXM5Y, DTXCID00147, EC 202-394-1, 4-26-00-00093 (Beilstein Handbook Reference), 1H-Benzotriazol, Benzotriazole (VAN), Entek, BtaH, CAS-95-14-7, Irgastab I 489, 1,2,3-Benzotriazole,1H-benzo[d][1,2,3]triazole, azaindazole, benzotriazol, ISK 3, aza-indazole, 3uzj, 1 h-benzotriazole, 1,3-Triazaindene, 0CT, 1,3-Benzotriazole, Cobratec No. 99, 1,2-Aminozophenylene, 1,2,3-Benztriazole, 1H-1,3-Benzotriazole, 1,3-Triaza-1H-indene, 1H-Benzotriazole (VAN8C, WLN: T56 BMNNJ, SCHEMBL8956, 1H-BT, MLS002302971, CHEMBL84963, 1H-benzo-[1,2,3]triazole, D 32-108, 1H-BENZOTRIAZOLE [MI], BDBM36293, NSC3058, Benzotriazole, analytical standard, HMS3091M10, Benzotriazole, reagent grade, 97%, CS-D1407, HY-Y0688, STR01561, Tox21_201501, Tox21_302934, BDBM50234613, MSK159039, STL281967, Benzotriazole, ReagentPlus(R), 99%, 1,2,3-BENZOTRIAZOLE [HSDB], 1H-Benzotriazole, >=98.0% (N), AKOS000119181, AKOS025396849, FB01299, PS-3644, NCGC00091322-01, NCGC00091322-02, NCGC00091322-03, NCGC00256574-01, NCGC00259052-01, BP-21454, SMR001252218, 1ST159039, DB-022595, MSK159039-1000, B0094, NS00010261, Benzotriazole, Vetec(TM) reagent grade, 98%, EN300-17964, Benzotriazole Solution in Toluene, 1000?g/mL, Benzotriazole Solution in Toluene, 1000mug/mL, D77352, G85866, AB00374479-06, 1ST159039-1000, AC-907/34124039, Q220672, Z57127352, F2190-0645, InChI=1/C6H5N3/c1-2-4-6-5(3-1)7-9-8-6/h1-4H,(H,7,8,9, 202-394-
Cobratec 99 is slightly soluble in water, soluble in hot water, and easily soluble in alkaline aqueous solutions.
Cobratec 99 is divided into oil-soluble benzotriazole and water-soluble benzotriazole.
Among them, water-soluble Cobratec 99 can be dissolved in water.
Cobratec 99 can also be dissolved with a solvent.
The high content of active components and the small number of impurities are prerequisites for the solubility of Cobratec 99.
Cobratec 99 includes ethanol, benzene, toluene, chloroform, and N N-dimethylformamide.
The solubility of water and oil determines that Cobratec 99 must have a high content of impurities and less water to achieve both water and oil.
Cobratec 99 is not only water-soluble but also oil soluble.
Cobratec 99, The emulsifier is not required for the addition process.
This can greatly reduce the side effects of the addition of Cobratec 99.
Cobratec 99 is bitter, odorless, boiling point is 204℃ (15mmHg),soluble in alcohol, benzene, toluene, chloroform and dimethylformamide, and slightly soluble in water.
Cobratec 99 belong to the most effective corrosion inhibitors for copper and copper alloys.
Cobratec 99 does further show positive effects in protection of steel, gray iron, cadmium and nickel.
Cobratec 99 is one of the most effective corrosion inhibitors for copper and copper alloy used in various industries.
Further positive effects of Cobratec 99 can be seen in protection of steel, grey iron, Cadmium and Nickel.
Cobratec 99 is bitter, odorless, boiling point is 204℃ (15mmHg),soluble in alcohol, benzene, toluene, chloroform and dimethylformamide, and slightly soluble in water.
Cobratec 99 is a heterocyclic compound with the chemical formula C6H5N3.
Cobratec 99's five-membered ring contains three consecutive nitrogen atoms.
Cobratec 99 may be viewed as fused rings of the aromatic compounds benzene and triazole.
Cobratec 99 has a variety of uses, for instance, as a corrosion inhibitor for copper.
Cobratec 99 is bitter,odorless,boiling point is 204℃(15mmHg),soluble in alcohol, benzene, toluene, chloroform and dimethylformamide,and slightly soluble in water.
Cobratec 99 is white to light yellow needles, m.p. 98.5 deg.] C, boiling point 204 ℃ (15 mm Hg), slightly soluble in water, soluble in alcohol, benzene, toluene, chloroform and other organic solvents.
Cobratec 99 copper corrosion inhibitor can be adsorbed on the metal surface to form a thin film to protect copper and other metals from corrosion and atmospheric harmful media.
Cobratec 99 can be absorbed on metal surface and form a thin film to protect copper and other metals.
Cobratec 99 is White needle, flake, granular, powder.
Cobratec 99 is soluble in alcohol,benzene,toluene,chloroform and DMF, slightly soluble in water,turn red in air with oxidation,explosive in vacuum distillation.
Cobratec 99 is an effective corrosion inhibitor for copper and its alloys by preventing undesirable surface reactions.
It is known that when copper is immersed in a solution containing Cobratec 99, a passive layer consisting of a complex between copper and benzotriazole is formed.
The passive layer is insoluble in aqueous and many organic solutions.
There is a positive relationship between the thickness of the passive layer and the effectiveness of preventing corrosion.
Cobratec 99 is used in protection, especially in the treatment of bronze disease.
The precise nature of the copper-Cobratec 99 complex is controversial, and many suggestions have been put forward.
Cobratec 99 derivatives have chemical and biological properties that are versatile in the pharmaceutical industry.
Cobratec 99 derivatives act as agonists for many proteins.
For example, vorozol and alizapride have beneficial inhibitory properties against different proteins, and Cobratec 99 esters have been reported to work as mechanism-based inactivators for the severe acute respiratory syndrome (SARS)3CL protease.
The methodology is not only limited to heterocyclization, but has also been successful for polynuclear hydrocarbons of small carbocyclic systems.
Cobratec 99 can be processed into flakes, granules, powder.
Cobratec 99 is oxidized in the air and gradually turned red.
Cobratec 99 tastes bitter and odorless.
Cobratec 99 is soluble in ethanol, benzene, toluene, chloroform and N,N-dimethylformamide, slightly soluble in water.
Cobratec 99 is bitter, odorless, boiling point is 204% (15mmHg),soluble in alcohol, benzene, toluene, chloroform and dimethylformamide, and slightly soluble in water.
Cobratec 99 is a heterocyclic compound containing three nitrogen atoms, with the chemical formula C6H5N3.
Cobratec 99 is colorless and polar and can be used in various fields.
Cobratec 99 other names 1H-Benzotriazole, is slightly soluble in water.
Cobratec 99 is a heterocyclic compound containing three nitrogen atoms with the chemical formula C6H5N3.
Cobratec 99 has two fused rings.
Cobratec 99's five-membered ring may be present in tautomers A and B, and derivatives of both tautomers as well as structures C and D can be produced.
Cobratec 99 is highly water-soluble, does not decompose immediately, and has a limited absorption tendency. Cobratec 99 is only partially removed in wastewater treatment plants, and a significant part reaches surface waters such as rivers and lakes.
Cobratec 99 exists as a white solid.
Cobratec 99 is a heterocyclic compound containing three nitrogen atoms, with the chemical formula C6H5N3.
Cobratec 99 is an anticorrosive chemical used primarily on copper, but also on iron, steel, cadmium, chromium, zinc.
Cobratec 99 can form covalent and coordinate-covalent linkages with metals, which prevent attack by corrosive agents.
Cobratec 99 is bitter, odorless, soluble in alcohol, benzene, toluene, chloroform and DMF, slightly soluble in water, turn red in air with oxidation.
The simplest member of the class of benzotriazoles that consists of a benzene nucleus fused to a 1H-1,2,3-triazole ring.
Cobratec 99 consists of benzene and a tri-azole ring.
The nitrogen atoms in the triazole ring form a bond between the copper, which inhibits the product.
Uses of Cobratec 99:
Cobratec 99 is mainly used as antirust agent and corrosion inhibitor for metals.
Cobratec 99 is widely used in the antirust oil products such as gas phase corrosion inhibitor , in treating agent for recycling water ,in antifreeze for cars antifogging for photograph.
Cobratec 99 is used as stabilizer for macromolecular compound, growth regulator for plant, lubricant additive , ultraviolet absorbent etc.
Cobratec 99 can be used together with many kinds of scale inhibitors and bactericide and algaecide,and Cobratec 99 shows excellent anticorrosion effect in close recycling cooling water system.
Cobratec 99 is used in metal rust and corrosion inhibitors, used in the preparation of water quality stabilizers, anti-rust greases, and also used in the synthesis of photographic anti-fogging agents and vapor phase rust inhibitors.
Cobratec 99 is used in extreme pressure industrial gear oils.
Cobratec 99 can be used as anti-rust and vapor phase corrosion inhibitor in lubricating grease such as curve gear oil, anti-wear hydraulic oil, oil film bearing oil, lubricating grease.
Cobratec 99 is used in anti-rust oil (grease) products, mostly used in the vapor phase of copper and copper alloy Corrosion inhibitor circulating water treatment agent, automobile antifreeze, photographic antifogging agent, polymer stabilizer, plant growth regulator, lubricant additive, ultraviolet absorber, etc.
Cobratec 99 can also be used in conjunction with a variety of scale inhibitors, bactericidal and algaecide.
Cobratec 99 is used for corrosion and rust prevention of copper and silver equipment.
Cobratec 99 can also be used in the preparation of photographic dust-proof, anti-fog and vapor phase rust inhibitor.
Cobratec 99 is mainly used as rust-preventer,antifreezing liquid, antioxidant additive(including lubricating oil, hydraulic oil,brake oil, transformer's oil), emugent, water stabilizer, the additive for high molecular materials'(polyester and polyesteramide)capacity of ultraviolet resistance and anstatic electricity, photographic antifogging agent, copper mine flotation, metal's slow corrosion etc.
Cobratec 99 has already been used as a restrainer (or anti-fogging agent) in photographic emulsions or developing solutions, and as a reagent for the analytical determination of silver.
Cobratec 99 has been extensively used as a corrosion inhibitor in the atmosphere and underwater.
Cobratec 99's derivatives and their effectiveness as drug precursors have been drawing attention.
Cobratec 99 can be used as antifreezes, heating and cooling systems, hydraulic fluids, and vapor-phase inhibitors as well.
Cobratec 99 is an effective corrosion inhibitor for copper and its alloys by preventing undesirable surface reactions.
Cobratec 99 is known that a passive layer, consisting of a complex between copper and benzotriazole, is formed when copper is immersed in a solution containing benzotriazole.
Cobratec 99 is used in conservation, notably for the treatment of bronze disease.
Cobratec 99 derivatives act as agonists for many proteins.
For instance, vorozole and alizapride have useful inhibitory properties against different proteins and benzotriazole esters have been reported to work as mechanism-based inactivators for severe acute respiratory syndrome (SARS) 3CL protease.
The methodology is not only limited to heterocyclization but was also successful for polynuclear hydrocarbons of small carbocyclic systems.
Environmental relevance:
Cobratec 99 is fairly water-soluble, not readily degradable and has a limited sorption tendency.
Hence, Cobratec 99 is only partly removed in wastewater treatment plants and a substantial fraction reaches surface water such as rivers and lakes.
Cobratec 99 is considered to be of low toxicity and a low health hazard to humans although exhibiting some antiestrogenic properties.
Cobratec 99 is mainly used as rust-preventer, antifreezing liquid, antioxidant additive(including lubricating oil, hydraulic oil, brake oil, transformer's oil), emugent, water stabilizer, the additive for high molecular materials' (polyester and polyesteramide) capacity of ultraviolet resistance and anti- static electricity, photographic antifogging agent, copper mine flotation, metal's slow corrosion etc.
Cobratec 99 is used Cooling water systems / industrial water treatment, industrial lubricants (e.g. drilling and cutting fluids), dishwashing tablets (silver protection), metal detergents and polishing, coolants, VCI papers / metal packaging, antifogging agent (photo)
Cobratec 99 is used in cooling water or boiler systems by the industrial water treatment industry.
Cobratec 99 can be also used in coolants and antifreeze products.
An application of Cobratec 99 is the use as an additive in industrial lubricants, like e.g. drilling and cutting fluids.
Cobratec 99 does also work to protect silver ware in dishwashing tablets and can be further used in metal detergents.
Cobratec 99 is mainly used as rust-preventer, antifreezing liquid, antioxidant additive(including lubricating oil, hydraulic oil, brake oil, transformer's oil), emugent, water stabilizer, the additive for high molecular materials (polyester and polyesteramide) capacity of ultraviolet resistance and anti-static electricity, photographic antifogging agent, copper mine flotation, metal's slow corrosion etc.
Cobratec 99 is used in combination with ammonium hydroxide and ethylenediaminetetraacetic acid.
Cobratec 99 has an anti-corrosion effect on metal materials such as copper, aluminum, cast iron, nickel, and zinc.
Cobratec 99 can be combined with a variety of corrosion inhibitors to improve corrosion inhibition.
Cobratec 99 is also widely used in metal rust inhibitors such as copper, silver, zinc, aluminum, cast iron, water purifying agents, etc.
Cobratec 99 is mainly used for water treatment, oil oxidation, metal oxidation and so on.
Cobratec 99 has a good corrosion inhibition effect on the copper and has the same anti-corrosion effect on other metal materials.
Cobratec 99 is also preferred UV absorber.
Adding benzotriazole to products such as plastics, rubber, and fuel can solve the degradation problem well.
And Cobratec 99 can improve the light resistance of synthetic materials.
Cobratec 99 is used for surface purification of silver, copper, and zinc in electroplating, and has an anti-tarnishing effect.
Cobratec 99 is a good ultraviolet light absorber and can be used as a development antifogging for black and white film and photographic paper.
Cobratec 99 is used additive to cutting fluid, immobile working fluid, antifreeze, circulating coolant, etc.
When added to lubricating oil and transformer oil, Cobratec 99 prevents aging of the oil.
Cobratec 99 is used additive for acidic copper plating solution.
When added to coating agents such as paints, Cobratec 99 inhibits corrosion of the underlying film.
Cobratec 99 is used additives for copper polishing agents.
In the photographic industry, Cobratec 99 is used as a stabilizer against ultraviolet lights.
Cobratec 99 has already been used as a restrainer in photographic emulsions and as a reagent for the analytical determination of silver.
Cobratec 99 has been extensively used as a corrosion inhibitor in the atmosphere and underwater.
Cobratec 99 can be used as antifreezes, heating and cooling systems, hydraulic fluids and vapor phase inhibitors as well.
Cobratec 99 is an effective corrosion inhibitor for copper and its alloys by preventing undesirable surface reactions.
Cobratec 99 is used in conservation, notably for the treatment of bronze disease.
Cobratec 99 is used Photographic emulsions, anti-corrosion, pharmaceutical industry.
Cobratec 99 is already used as a limiting (or anti-fogging agent) in photographic emulsions or solution development, and as a reagent for the analytical determination of silver.
Cobratec 99 has been widely used as a corrosion inhibitor in the atmosphere and underwater.
Cobratec 99 is used in antifreeze, heating and cooling systems, hydraulic fluids and vapor phase inhibitors.
Cobratec 99 is mainly used as rust-preventer, anti-freezing liquid, antioxidant additive(including lubricating oil, hydraulic oil, brake oil, transformer's oil), water stabilizer, the additive for high molecular materials (polyester and polyesteramide) capacity of ultraviolet resistance and anti-static electricity, photographic anti-fogging agent, copper mine flotation, metal's slow corrosion etc.
Cobratec 99 is applied as anti-rusting agent or corrosion inhibitor for metal (mainly copper and its alloys) by forming a passive layer, consisting of a complex between copper and benzotriazole, when copper is immersed in a solution containing benzotriazole.
Cobratec 99 is used as anti-freezing agent for car, synthetic detergent, anti-dust agent for photography and polymer stabilizer.
Cobratec 99 is mainly used as rust-preventer, antifreezing liquid, (including lubricating oil, hydraulic oil, brake oil, transformer's oil), emugent, water stabilizer, the additive for high molecular materials (polyester and polyesteramide) capacity of ultraviolet resistance and anti static electricity, photographic antifogging agent, copper mine flotation, metal's slow corrosion etc.
Cobratec 99 is a corrosion inhibitor for copper and copper alloys, and is commonly used in water cooling systems.
Cobratec 99 applications include use as a silver polishing agent in dishwasher detergent, automotive antifreeze, antirust for photography, and use as a lubricant additive.
Cobratec 99 can also be derived to create anti-fading agents for metals, antiseptic agents, UV-absorbers, pesticides, and photoconductors.
Cobratec 99 also possesses antihypertensive, antibacterial, analgesic, antifungal, antiviral, and anti-inflammatory properties.
Cobratec 99 is an anticorrosive agent well known for its use in aircraft deicing and antifreeze fluids but also used in dishwasher detergents.
Cobratec 99 on copper, aluminum, cast iron, nickel, zinc and other metal materials have anti-corrosion effect.
It can be combined with a variety of corrosion inhibitors, such as with chromate, polymeric phosphate, molybdate, silicate, nitrite, ATMP, HEDP, EDTMP, etc.
Cobratec 99 can improve the corrosion inhibition effect.
Cobratec 99 can be used with a variety of scale inhibitors, bactericidal algaecide, benzotriazole on the corrosion inhibition of polyphosphate does not interfere, the oxidation resistance is very strong.
Cobratec 99 is used in anti-rust oil (Grease) products, mostly used in copper and copper alloy vapor phase corrosion inhibitor circulating water treatment agent, automobile antifreeze, photographic antifogging agent, polymer stabilizer, plant growth regulator, lubricating oil additive, ultraviolet absorber, etc.
Cobratec 99 can also be used in combination with a variety of scale inhibitors and biocide.
Cobratec 99 is mainly used for metal (such as silver, copper, lead, zinc, nickel) as antirust and corrosion inhibitor.
Cobratec 99 is widely used in rustproof oil (fat) products, and more as vapor phase inhibitors of copper and copper alloy, circulating water treatment agent, also used for auto antifreeze, polymer stabilizers, plant growth regulator, lubricant additives, UV absorber, etc, and used for garment/hair dying and pharmaceutical chemical.
Cobratec 99 can also be matched with a variety of scale inhibitor, algae fungicidal, especially has good corrosion-resistant effect on closed circulating cooling water system.
Cobratec 99 is mainly used as antirust agent and corrosion inhibitor for metals.
Cobratec 99 is widely used in the antirust oil products such as gas phase corrosion inhibitor, in treating agent for recycling water, in antifreeze for cars antifogging for photograph, also used as stabilizer for macromolecular compound growth regulator for plant, lubricant additive, ultraviolet absorbent etc.
Cobratec 99 can be used together with many kind of scale inhibitors and bactericide algaecide, show excellent anticorrosion effect in close recycling cooling water system.
Cobratec 99 is mainly used as rust-preventer, antifreezing liquid, antioxidant additive(including lubricating oil, hydraulic oil, brake oil, transformer's oil), emugent, water stabilizer, the additive for high molecular materials (polyester and polyesteramide) capacity of ultraviolet resistance and anti static electricity, photographic antifogging agent, copper mine flotation, metal's slow corrosion etc.
As an anticorrosive, Cobratec 99 is used in metal working, in art restoration, and in the construction industry as a tarnish remover and a protective coating.
Cobratec 99 functions as a corrosion inhibitor in water cooling systems and in dry cleaning equipment.
Cobratec 99 is used in synthetic greases, lubricants, and hydraulic fluids to prevent the oxidation of these materials which is catalyzed by metal ions.
In the electronics industry, Cobratec 99 is used to treat packing materials for copper electronic parts and to extend the life of polymers that are used as insulators for copper wire
Cobratec 99 is used in electrolytic processing, where the stripping of metals from copper cathodes is eased by pretreatment of the cathode with BTA.
In photographic processing, Cobratec 99 acts as an antifogging agent in silver-halide emulsions, restraining the developer and preventing the blackening or fogging of the image due to overdevelopment.
Cobratec 99 is mainly used as antirust or corrosion inhibitors for copper or copper alloy etc in lubricant oil/grease, circulating water treatment, engine coolant etc. also used with antiscale additives
Cobratec 99 is mainly used in the metal's (silver, lead, nickel, zinc, copper) antirust and corrosion moderating, widely used in antirust oil, copper and alloy copper's moderating corrosion, water circulation treatment, antifogging agent, macromolecule stabilizer, plant growth regulator, lubricating oil additive, ultraviolet absorber etc.
Cobratec 99 also can cooperate with many kinds of dirt prevention and germs killing, especially and household detergent to the corrosion.
Cobratec 99 is a very widely used chemical in various industries.
Cobratec 99 is used as a corrosion inhibitor for metals such as copper and its alloys.
Cobratec 99 is used as anti blur factor in photo printing.
Cobratec 99 is used in production of light-sensitive chemicals.
Cobratec 99 is used in application in cleaners used in plating processes.
Cobratec 99 is used in production Water purification products and Laboratory chemicals.
Cobratec 99 Corrosion Inhibitor:
One of the most common methods of corrosion control is the use of disinfectants such as nitrates and chromates.
Finding alternative compounds for these compounds is very important for environmental reasons.
Cobratec 99 and the azole family are one of these alternatives, which chemically adsorb nitrogen atoms on the surface by sharing unpaired electron pairs with an empty metal orbital to prevent dissolution and corrosion.
Cobratec 99 is mainly used as rust-preventer, antifreezing liquid, antioxidant additive (including lubricating oil, hydraulic oil, brake oil, transformer's oil), emugent, water stabilizer, the additive for high molecular materials (polyester and polyesteramide) capacity of ultraviolet resistance and anti- static electricity, photographic antifogging agent, copper mine flotation, metal's slow corrosion etc.
Cobratec 99 is a chemical used as a ligand to form complexes and has many applications in industry, the most common of which is to prevent rust and corrosion of metals.
Cobratec 99 is a corrosion inhibitor for metals such as copper and its alloys, silver, aluminum, cobalt, and zinc, which are relatively soluble in water and do not decompose easily.
Cobratec 99, commonly abbreviated as BTA, is a versatile compound used in industries such as Semiconductor/Electronic manufacturing and drug manufacturing.
Cobratec 99 in solution allows the material to react with certain metals to create a corrosion inhibiting layer.
For this reason, Cobratec 99 is also a common component in materials such as antifreeze or detergents, where metal corrosion is a concern.
Benefits of Cobratec 99:
Cobratec 99 is a corrosion inhibitor for copper, copper alloys, and other metals.
Forming rust preventive firm of Cobratec 99 is thin, insoluble, and transparent.
Stable for an acid and an alkaline.
Absorbs ultraviolet lights.
Soluble with various solvent.
Preparation Method of Cobratec 99:
Cobratec 99 is obtained by reacting o-benzenetriamine with sodium nitrite.
The o-benzenetriamine was dissolved in 50°C water, and then glacial acetic acid was added to cool to 5°C.
The reaction was then stirred by the addition of sodium nitrite.
The reactants gradually turned dark green.
The temperature rose to 70-80°C and the solution turned orange.
Leave at room temperature for 2 h.
The crystals were cooled, filtered, washed with ice water and dried to dryness.
The crude product was distilled under reduced pressure.
The fraction of 201-204°C (2.0 kPa) was collected and recrystallized from benzene to obtain a product having a melting point of 96°C-97°C, and the yield was about 80%.
Cobratec 99 is synthesized from the reaction between orthophenylenediamine, sodium nitrite, and acetic acid.
To improve the reaction, it is done at temperatures of 5 to 10 degrees and in an ultrasonic bath.
Structure of Cobratec 99:
Cobratec 99 features two fused rings.
Cobratec 99's five-membered ring can exist in tautomers A and B, and the derivatives of both tautomers, structures C and D, can also be produced:
Benzotriazole tautomers and their derivatives.
Various structural analyses with UV, IR and 1H-NMR spectra indicated that isomer A is predominantly present at room temperature.
The bond between positions 1 and 2 and the one between positions 2 and 3 have proved to have the same bond properties.
Moreover, the proton does not tightly bind to any of the nitrogen atoms, but rather migrates rapidly between positions 1 and 3.
Therefore, the Cobratec 99 can lose a proton to act as a weak acid (pKa = 8.2) or accept a proton using the lone pair electrons located on its nitrogen atoms as a very weak Brønsted base (pKa < 0).
Not only can Cobratec 99 act either as an acid or base, Cobratec 99 can also bind to other species, utilizing the lone pair electrons.
Applying this property, the Cobratec 99 can form a stable coordination compound on a copper surface and behave as a corrosion inhibitor.
Cobratec 99 is a heterocycle compound with the chemical formula C6H5N3.
Cobratec 99 has two nitrogen rings in its chemical structure which are produced by the fusion of the benzene ring, this point causes the stability and resistance of the molecule.
Cobratec 99 consists of two five-membered rings that include tautomers A and B, and derivatives of both tautomers can form structures C and D.
Synthesis and Reactions of Cobratec 99:
A synthesis of the Cobratec 99 involves the reaction of o-phenylenediamine, sodium nitrite, and acetic acid.
The conversion proceeds via diazotization of one of the amine groups:
The synthesis can be improved when the reaction is carried out at low temperatures (5–10 °C) and briefly irradiated in an ultrasonic bath.
Typical batch purity is 98.5% or greater.
Biphenylene and benzyne can be conveniently prepared from benzotriazole by N-amination with hydroxylamine-O-sulfonic acid.
The major product, 1-aminobenzotriazole, forms benzyne in an almost quantitative yield by oxidation with lead(IV) acetate, which rapidly dimerises to biphenylene in good yields.
History of Cobratec 99:
Cobratec 99 was first synthesized in the late 19th century during studies on nitrogen-rich heterocycles, primarily through the reaction of o-phenylenediamine with nitrous acid.
Initially, it attracted limited attention, but its ability to form stable complexes with metals, especially copper, soon highlighted its value as a corrosion inhibitor.
By the 1950s, BTA had gained significant industrial importance, particularly in the protection of copper and its alloys in cooling systems, antifreeze solutions, and industrial lubricants.
Throughout the 1960s and 1970s, its applications expanded to electronics, automotive industries, and as an additive in engine coolants.
In the following decades, BTA also found uses as a UV stabilizer in polymers, a photographic chemical, and a passivation agent in metallurgy.
Today, it remains a key compound in metal protection, although recent research has focused on developing environmentally friendly alternatives due to concerns about its persistence and toxicity in aquatic environments.
Handling and Storage of Cobratec 99:
Handling:
Avoid contact with skin, eyes, and clothing.
Prevent inhalation of dust, vapors, or fumes.
Use only in well-ventilated areas or under fume hoods.
Avoid generating dust; handle with proper protective equipment.
Do not eat, drink, or smoke while handling this chemical.
Storage:
Store in a tightly sealed container.
Keep in a cool, dry, and well-ventilated area.
Protect from heat, open flames, and direct sunlight.
Store away from oxidizing agents, strong acids, and bases.
Reactivity and Stability of Cobratec 99:
Stability:
Stable under recommended storage conditions.
Reactivity:
May react with strong oxidizers.
Avoid contact with strong acids and alkalis.
Hazardous Decomposition Products:
When heated to decomposition, emits toxic fumes of nitrogen oxides (NOx).
Conditions to Avoid:
Excessive heat, open flames, and moisture.
First Aid Measures of Cobratec 99:
Inhalation:
Move the person to fresh air.
If breathing is difficult, provide oxygen.
Seek medical attention if symptoms persist.
Skin Contact:
Wash affected area thoroughly with soap and water.
Remove contaminated clothing.
Seek medical help if irritation persists.
Eye Contact:
Rinse immediately with plenty of water for at least 15 minutes.
Seek medical attention if irritation continues.
Ingestion:
Rinse mouth with water.
Do not induce vomiting.
Seek medical advice immediately.
Firefighting Measures of Cobratec 99:
Suitable Extinguishing Media:
Water spray, dry chemical, foam, or carbon dioxide (CO₂).
Unsuitable Media:
Do not use a high-volume water jet.
Fire Hazards:
May release toxic fumes (NOx) when burning.
Protective Equipment for Firefighters:
Use self-contained breathing apparatus (SCBA) and protective clothing.
Accidental Release Measures of Cobratec 99:
Personal Precautions:
Wear protective gloves, safety goggles, and dust mask/respirator.
Avoid dust formation.
Environmental Precautions:
Prevent entry into drains, waterways, or soil.
Methods for Clean-Up:
Sweep or vacuum the material (avoid dry sweeping that raises dust).
Place in a properly labeled container for disposal.
Wash contaminated surfaces.
Exposure Controls / Personal Protection of Cobratec 99:
Engineering Controls:
Use with local exhaust ventilation or in a chemical fume hood.
Personal Protective Equipment (PPE):
Eye Protection:
Chemical safety goggles.
Skin Protection:
Chemical-resistant gloves (nitrile or neoprene).
Body Protection:
Lab coat or protective clothing.
Respiratory Protection:
Use NIOSH-approved respirator if airborne concentrations exceed limits.
Hygiene Measures:
Wash hands and face after handling.
Remove contaminated clothing and wash before reuse.
Identifiers of Cobratec 99:
CAS Number: 95-14-7
EC Number: 202-394-1
UNII: J1J70VHG2F
PubChem CID: 7226
Molecular Formula: C₆H₅N₃
Molecular Weight: 119.12 g/mol
InChI: InChI=1S/C6H5N3/c1-2-4-6-5(1)7-9-8-6/h1-4H,(H,7,8,9)
InChI Key: GEHQUJUHKYNOCV-UHFFFAOYSA-N
SMILES: c1ccc2c(c1)[nH]nn2
CAS Registry Number: 95-14-7
EC Number: 202-394-1
RTECS Number: DM1225000
Beilstein Reference: 146941
Merck Index: 13,1080
HS Code: 2933.99
UN Number: Not classified as dangerous goods for transport under UN.
Properties of Cobratec 99:
Appearance: White to light yellow needle-shape crystalloids or granular
Purity, %: 99.5 min
Colour APHA (Hazen): 40.0 max
Moisture, %: 0.1 max
Melting point, ℃: 96.0 min
Ash content, %: 0.03 max
pH: 5.0-6.0
Molar mass: 119.127 g·mol−1
Appearance: White solid
Density: 1.36 g/mL
Melting point: 100 °C (212 °F; 373 K)
Boiling point: 350 °C (662 °F; 623 K)
Solubility in water: 20 g/L
Acidity (pKa): 8.2
Basicity (pKb): > 14
PSA: 41.57000
XLogP3: 1
Appearance: Cobratec 99 appears as white to light tan crystals or white powder. No odor.
Density: 1.36 g/cm3
Melting Point: 98.5 °C
Boiling Point: 159 °C @ Press: 2 Torr
Flash Point: 170ºC
Refractive Index: 1.715
Water Solubility: H2O: 25 g/l in water (20 ºC)
Vapor Pressure: 0.04 mm Hg ( 20 °C)
Vapor Density: 4.1 (vs air)
Odor: No odor
PH: The solution in water is a weak acid
Molecular Weight: 119.12
XLogP3: 1
Hydrogen Bond Donor Count: 1
Hydrogen Bond Acceptor Count: 2
Exact Mass: 119.048347172
Monoisotopic Mass: 119.048347172
Topological Polar Surface Area: 41.6
Heavy Atom Count: 9
Complexity: 92.5
Covalently-Bonded Unit Count: 1
Compound Is Canonicalized: Yes
