98-35-1

Basic information

• Product Name: 4-Amino-3-chlorobenzenesulfonic acid
• Synonyms: 4-AMINO-3-CHLOROBENZENESULFONIC ACID;3-chlorosulphanilic acid;2-CHLOROANILINE-4-SULFONIC ACID;o-CHLOROANILINE-p-SULFONOC ACID;3-Chloro-4-aminobenzenesulfonic acid;4-azanyl-3-chloro-benzenesulfonic acid
• CAS NO: 98-35-1
• Molecular Formula: C₆H₆ClNO₃S
• Molecular Weight: 207.63
• EINECS: 202-660-7
• Mol File: 98-35-1.mol
• Article Data: 6

Chemical Properties

• Appearance: /
• Density: 1.642 g/cm³
• Refractive Index: 1.639
• Storage Temp.: 2-8°C
• CAS DataBase Reference: 4-Amino-3-chlorobenzenesulfonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 4-Amino-3-chlorobenzenesulfonic acid(98-35-1)
• EPA Substance Registry System: 4-Amino-3-chlorobenzenesulfonic acid(98-35-1)

Safety Data

• Hazardous Substances Data: 98-35-1(Hazardous Substances Data)

Usage

Uses

2-Chloroaniline-4-sulfonic Acid, can be used for the preparation of brown polysulfonamide dyes.

InChI:InChI=1/C6H6ClNO3S/c7-5-3-4(12(9,10)11)1-2-6(5)8/h1-3H,8H2,(H,9,10,11)

Upstream product

• 95-51-2 o-chloroaniline 
• 95-50-1 1,2-dichloro-benzene 

Downstream Products

• 105548-19-4 4-(2-Acetylamino-4-diethylamino-phenylazo)-3-chloro-benzenesulfonic acid 
• 105547-81-7 4-(4-Amino-2-diethylamino-6-methyl-pyrimidin-5-ylazo)-3-chloro-benzenesulfonic acid 
• 105547-60-2 4-(5-Amino-3-methyl-1-phenyl-1H-pyrazol-4-ylazo)-3-chloro-benzenesulfonic acid 
• 105547-99-7 3-Chloro-4-(4,6-diamino-2-ethylsulfanyl-pyrimidin-5-ylazo)-benzenesulfonic acid 
• 874-18-0 2-chloro-4,6-dibromoaniline 

Relevant articles and documents

PEGYLATION PROCESS

The present invention relates to the attachment of a polyethylene glycol (PEG) moiety to a target substrate. Processes for such attachment will be hereinafter referred to as "PEGylation" of the substrate. In particular, the present invention relates to a process for direct covalent PEGylation of a substrate, comprising the reaction of a halogenated PEG with the substrate wherein the halogen of the halogenated PEG acts as a leaving group in the PEGylation reaction.

Process for the preparation of aminoaryl-sulphonic acids

Aminoaryl-sulphonic acids can be prepared by reaction of arylamines and sulphuric acid at elevated temperature and under pressure, where water formed and, where appropriate, water present as water of dilution, is left in the reaction mixture until the end of the reaction.

Triazinyl reactive dyes containing additional fiber reactive groups bound through the sulfonylalkylaminoalkylamino bridge

The invention relates to novel useful reactive dyes of the formula I STR1 in which: F is a radical selected from the group consisting of metal-free or metal-containing monoazo or disazo dyes containing at least one --SO3 H group, anthraquinone dyes, sulfophthalocyanine dyes, formazan dyes, phenazine dyes, oxanine dyes and nitroaryl dyes, R is hydrogen, C1 -C4 alkyl which is unsubstituted or substituted with --COOH or --SO3 H, cyanoethyl, or hydroxyethyl, X is fluorine, chlorine, bromine, --SO3 H, phenylsulfonyl or C1 -C4 -alkylsulfonyl, P is 1 or 2 and A is a radical of the formula STR2 in which: the groups designated "alk" are independently of each other straight or branched polymethylene radicals having 2 to 6 carbon atoms, and Z is β-halogenoethyl, vinyl, β-sulfatoethyl, β-thiosulfatoethyl or βacetoxyethyl.