50815-99-1

Basic information

• Product Name: 2-benzotriazol-2-yl-4-methyl-phenol
• CAS NO: 50815-99-1
• Molecular Formula: C13H11N3O
• Molecular Weight: 0
• Mol File: 50815-99-1.mol
• Article Data: 7

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 2-benzotriazol-2-yl-4-methyl-phenol(CAS DataBase Reference)
• NIST Chemistry Reference: 2-benzotriazol-2-yl-4-methyl-phenol(50815-99-1)
• EPA Substance Registry System: 2-benzotriazol-2-yl-4-methyl-phenol(50815-99-1)

Safety Data

• Hazardous Substances Data: 50815-99-1(Hazardous Substances Data)

Upstream product

• 1435-71-8 4-methyl-2-(2-nitrophenylazo)phenol 
• 1435-71-8 2-nitro-2'-hydroxy-5'-methyl-azobenzene 

Relevant articles and documents

The Continuous Synthesis of 2-(2'-Hydroxy-5'-Methylphenyl)Benzotriazole over Cu/γ-Al2O3

Abstract: The samples of 20% Cu/γ-Al2O3, 20% Co/γ-Al2O3 and 20% Ni/γ-Al2O3 were prepared as hydrogenation catalysts for continuous synthesis of 2-(2'-hydroxy-5'-methylphenyl)benzotriazole. The best yield (86.62%) was afforded by the 20% Cu/γ-Al2O3 catalyst. The characterizations results obtained for the 20% Cu/γ-Al2O3 sample confirmed that Cu particles are evenly distributed over the surface of γ-Al2O3. A reduction of acid sites in the catalyst favored the selectivity to 2-(2'-hydroxy-5'-methylphenyl)benzotriazole. Furthermore, the effect of Cu content, reaction temperature, hydrogen pressure and liquid hourly space velocity was studied. Finally, 2-(2'-hydroxy-5'-methylphenyl)benzotriazole in 86.62% yield was attained under the optimized conditions.

Catalytic hydrogenation of 2-nitro-2′-hydroxy-5′-methylazobenzene over solid base-hydrogenation bifunctional catalysts: Effect of alkali metals on Pd/γ-Al2O3

Alkali metals doped Pd solid base-hydrogenation bifunctional catalysts were prepared, characterized, and employed in the hydrogenation of 2-nitro-2′-hydroxy-5′-methylazobenzene. The results indicated that the basicity of catalyst endowed by the alkali met

Hydrogenation kinetics of 2′-hydroxy-5′ -methyl-2-nitroazobenzene under quasisteady conditions

The kinetics of the liquid-phase hydrogenation of 2′-hydroxy-5′ -methyl-2-nitroazobenzene on skeletal nickel in propan-2-ol and its mixtures with water and sodium hydroxide was studied under quasisteady conditions ensured by a measured substrate feed into a reaction vessel. 2-(2-Hydroxy-5-methylphenyl)benzotriazole N-oxide, 2′-hydroxy-5′ -methyl-2-nitrohydrazobenzene, and aromatic amines were found to be the major reaction intermediates under both steady and quasi-steady conditions, provided the compositions of the solvents are the same. The highest reaction selectivity for the target product, namely, 2-(2-hydroxy-5-methylphenyl)benzotriazole, can be reached at low concentrations of the starting reagent in a chemisorbed layer and high rates of cyclization of 2′-hydroxy-5′ -methyl-2-nitrohydrazobenzene into 2-(2-hydroxy-5-methylphenyl)benzotriazole N-oxide.