134440-55-4

Basic information

• Product Name: methyl 3-[3-tert-butyl-4-hydroxy-5-(2-nitrophenyl)azo-phenyl]propanoate
• CAS NO: 134440-55-4
• Molecular Formula: C₂₀H₂₃N₃O₅
• Molecular Weight: 385.41
• Mol File: 134440-55-4.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 538°C at 760 mmHg
• Flash Point: 279.2°C
• Density: 1.22g/cm³
• Vapor Pressure: 3.45E-12mmHg at 25°C
• Refractive Index: 1.575
• CAS DataBase Reference: methyl 3-[3-tert-butyl-4-hydroxy-5-(2-nitrophenyl)azo-phenyl]propanoate(CAS DataBase Reference)
• NIST Chemistry Reference: methyl 3-[3-tert-butyl-4-hydroxy-5-(2-nitrophenyl)azo-phenyl]propanoate(134440-55-4)
• EPA Substance Registry System: methyl 3-[3-tert-butyl-4-hydroxy-5-(2-nitrophenyl)azo-phenyl]propanoate(134440-55-4)

Safety Data

• Hazardous Substances Data: 134440-55-4(Hazardous Substances Data)

Upstream product

• 88-74-4 2-nitro-aniline 
• 119-66-4 2-nitrobenzenediazonium chloride 
• 36837-50-0 methyl 3-(3-tert-butyl-4-hydroxyphenyl)propionate 
• 6386-38-5 methyl 3-(4-hydroxy-3,5-di-tert-butyl)phenylpropanoate 

Relevant articles and documents

Preparation method of 3-[3-(-benzotriazole -2-base)-4-hydroxy -5-tert-butylphenyl]- propionate (by machine translation)

3 - (3,5 - Of the process reduces, the tedious degree) of the process, omits the crystallization separation process, in the preparation process of the target product, saves the raw material ", and reduces the output " of waste, water and inorganic salt and other wastes 3 - [3 - (.) - 4 - The method, of the, present invention reduces the complexity, of the process by the. method] - of separating, and purifying the intermediate product, without isolation. (by machine translation)

Processes for the preparation of benzotriazole UV absorbers

Provided is a process for preparing 2H-benzotriazole UV absorbers containing a perfluoroalkyl moiety at the 5-position of the benzo ring, for example a trifluoromethyl group, which involves diazotizing the perfluoroalkyl substituted o-nitroaniline using concentrated sulfuric acid plus sodium nitrite or nitrosylsulfuric acid to form the corresponding monoazobenzene intermediate via the diazonium salt intermediate which is reduced to the corresponding 5-perfluoroalkyl substituted 2H-benzotriazole UV absorber compound by conventional reduction means. Also provided is a novel one-pot, multiphase reaction for the preparation of 2(2-nitrophenylazo) substituted phenols, which are precursors for 2H-benzotriazole UV absorbers.