Tolytriazole
5-Methyl-1H-benzotriazole
CAS: 136-85-6;29385-43-1
Molecular Formula: C7H7N3
Tolytriazole - Names and Identifiers
| Name | 5-Methyl-1H-benzotriazole |
| Synonyms | TTA 5M-BTA Retrocure G TOLYTRIAZOLE Vulkalent TM Tolyltriazole m-Tolylazoimide m-Aziminotoluene COBRATEC(R) TT 100 Methybenzotriazole Tolyltriazole (TTA) Methyl Benzotriazole 5-Methylbenzotriazole 1-H-Methylbenzotriazole Methyl-1H-Benzotriazole 5-methyl-1h-benzotriazol 5-Methyl-3H-benzotriazole 5-Methyl-2H-benzotriazole 5-methyl-2H-benzotriazole 6-Methyl-1H-benzotriazole 5-Methyl-1H-benzotriazole 1H-Benzotriazole,5-methyl- 1H-Benzotriazole,4(5)-methyl- 5-Methyl-1H-1,2,3-benzotriazole 1H-Benzotriazole,4(or5)-methyl- 4,5,6,7-TetrahydroTolyltriazole 5-Methyl-1H-benzo-1,2,3-triazole |
| CAS | 136-85-6 29385-43-1 |
| EINECS | 205-265-8 |
| InChI | InChI=1/2C7H7N3/c1-5-2-3-6-7(4-5)9-10-8-6;1-5-3-2-4-6-7(5)9-10-8-6/h2*2-4H,1H3,(H,8,9,10) |
| InChIKey | LRUDIIUSNGCQKF-UHFFFAOYSA-N |
Tolytriazole - Physico-chemical Properties
| Molecular Formula | C7H7N3 |
| Molar Mass | 133.15 |
| Density | 1.1873 (rough estimate) |
| Melting Point | 80-82°C(lit.) |
| Boling Point | 210-212°C12mm Hg(lit.) |
| Flash Point | 210-212°C/12mm |
| Water Solubility | 6.0 g/L (25 ºC) |
| Vapor Presure | 0.001Pa at 25℃ |
| Appearance | White solid |
| Color | Cream to beige |
| Maximum wavelength(λmax) | ['276nm(H2O)(lit.)'] |
| BRN | 116658 |
| pKa | 8.74±0.40(Predicted) |
| Storage Condition | Keep in dark place,Sealed in dry,Room Temperature |
| Refractive Index | 1.5341 (estimate) |
| MDL | MFCD00167158 |
| Physical and Chemical Properties | Melting Point: 80-84°C, Boiling Point: 210-212°C |
| Use | Mainly used as metal (silver, lead, nickel, zinc, copper and copper metal) rust inhibitor and corrosion inhibitor |
Tolytriazole - Risk and Safety
| Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. R37 - Irritating to the respiratory system R22 - Harmful if swallowed |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S38 - In case of insufficient ventilation, wear suitable respiratory equipment. |
| WGK Germany | 3 |
| RTECS | DM1400000 |
| TSCA | Yes |
| HS Code | 29339900 |
Tolytriazole - Nature
Open Data Verified Data
light brown powder, easily soluble in methanol, acetone, cyclohexane, ether, etc., difficult to dissolve in water and petroleum solvents. The aqueous solution is weakly acidic, and the pH value is 5.5~6.5. It is stable to acid and alkali, and can form stable metal salts with alkali metal ions.
Last Update：2025-06-10 22:55:16
Tolytriazole - Preparation Method
Open Data Verified Data
The crude methyl benzotriazole was obtained by diazotization of Toluene diamine, cyclization in acetic acid, and then distillation under reduced pressure. After recrystallization, purification and drying, a relatively pure methyl benzotriazole was obtained. There is also a method for obtaining a relatively pure methyl benzotriazole by using methyl O-Phenylenediamine and ethylhexyl nitrite as raw materials and ethylhexanol as a solvent without rectification.
Last Update：2025-06-10 22:55:16
Tolytriazole - Application
Open Data Verified Data
methylbenzotriazole has corrosion inhibition effect on copper and copper alloy. It can be compounded with other organic corrosion inhibitors or added separately. Methylbenzotriazole is used at a concentration of 2 to 10 mg/L.
Last Update：2025-08-19 16:24:40
Tolytriazole - Safety
Open Data Verified Data
rat oral LD50:675mg/kg. Protection should be performed during operation. Storage and transportation should be moisture-proof, moisture-proof, ventilation.
Last Update：2022-01-01 09:30:05
Tolytriazole - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | this product is used as a corrosion inhibitor for copper and copper alloy, similar to benzotriazole (BTA), and the actual commodity also includes 4-methylbenzotriazole ([29878-31-7]) or a mixture of the two, referred to as TTA. Benzotriazole corrosion inhibitors can form insoluble stable complexes with cuprous ions, adsorbed on the metal surface, forming a stable and inert protective film with a thickness of only 5 × 10-7cm, but It is very stable in various media, so that the copper alloy is protected. The corrosion inhibition effect of BTA in the pH range of 5.5-10 is limited, but the corrosion inhibition effect of TTA is stronger than that of BTA in low pH medium. Other triazole compounds, such as triazole and naphthalene triazole, also have corrosion inhibition effects on copper and copper alloys, but they are not as good as BTA and TTA. Methylbenzotriazole is also used in organic synthesis. Used as a rust inhibitor for copper Mainly used as a rust inhibitor and corrosion inhibitor for metals (silver, lead, nickel, zinc, copper and copper metals) |
| Production method | Similar to the preparation method of benzotriazole, it can be obtained by diazotization and cyclization of toluenediamine. An older method is obtained by the reaction of m-toluidine diazonium salt and p-toluenesulfonamide. |
Last Update：2024-04-10 22:29:15
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