23624-49-9

Basic information

• Product Name: Phenol,2-(5-chloro-2H-benzotriazol-2-yl)-
• Synonyms: Phenol,o-(5-chloro-2H-benzotriazol-2-yl)- (8CI);2-(2-Hydroxyphenyl)-5-chlorobenzotriazole; 5-Chloro-2-(2-hydroxyphenyl)benzotriazole;Antifade 8001
• CAS NO: 23624-49-9
• Molecular Formula: C12H8 Cl N3 O
• Molecular Weight: 245.668
• Mol File: 23624-49-9.mol
• Article Data: 4

Chemical Properties

• CAS DataBase Reference: Phenol,2-(5-chloro-2H-benzotriazol-2-yl)-(CAS DataBase Reference)
• NIST Chemistry Reference: Phenol,2-(5-chloro-2H-benzotriazol-2-yl)-(23624-49-9)
• EPA Substance Registry System: Phenol,2-(5-chloro-2H-benzotriazol-2-yl)-(23624-49-9)

Safety Data

• Hazardous Substances Data: 23624-49-9(Hazardous Substances Data)

Upstream product

• 114461-98-2 5-Chloro-2-(2-methoxy-phenyl)-2H-benzotriazole 
• 114461-93-7 4-chloro-2'-methoxy-2-nitroazobenzene 
• 90-04-0 2-methoxy-phenylamine 
• 89284-65-1 4-chloro-2-nitro-1-nitrosobenzene 
• 3864-99-1 2-(5'-chloro-2'H-benzotriazol-2'-yl)-4,6-di-tert-butylphenol 

Relevant articles and documents

ANTI-BLUE LIGHT COMPOUND, PREPARATION METHOD AND APPLICATION THEREOF

Disclosed is a blue light absorbing compound, its preparation method and use. The compound has high stability and is suitable for high temperature processing conditions as well as outdoor application. A method of covalently bonding a blue light absorbing compound with an ultraviolet light absorbing compound for increasing its stability is also provided. The compound is capable of absorbing or blocking ultraviolet light (UVA, UVB) and blue light to protect eyes. But long-wavelength blue light can be absorbed diminishingly, so that the transmitted light has a particularly good visual experience.

Preparation of Some 2-(Methoxyphenyl)-2H-benzotriazoles and the Corresponding Hydroxyphenyl Compounds

The reaction of several substituted o-nitronitrosobenzenes with o- and p-anisidine, and 2,4-dimethoxyaniline in acetic acid gives in good yield the corresponding o-nitroazobenzenes which are readily reduced with thiourea dioxide (formamidinesulfinic acid) to the corresponding 2-(methoxyphenyl)-2H-benzotriazoles, demethylation of which furnished the corresponding 2-(hydroxyphenyl)-2H-benzotriazoles.Demethylation of the dimethoxy derivatives was best accomplished with boron tribromide in methylene chloride, the methoxy group located ortho to the benzotriazole ring beingdemethylated more readily than is the para-methoxy group.The reaction of 0-nitroazobenzenes containing a methoxy group with hydrobromic acid in acetic acid results in cleavage of the azo bond and also partial bromination to give o-nitroaniline and some of its brominated derivatives.