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88-23-3

Basic Information
CAS No.: 88-23-3
Name: 2-Amino-4-chlorophenol-6-sulfonic acid
Article Data: 5
Molecular Structure:
Molecular Structure of 88-23-3 (2-Amino-4-chlorophenol-6-sulfonic acid)
Formula: C6H6ClNO4S
Molecular Weight: 223.637
Synonyms: 1-Phenol-2-sulfonicacid, 6-amino-4-chloro- (5CI);Metanilic acid, 5-chloro-2-hydroxy- (7CI,8CI);1-Amino-5-chloro-2-hydroxy-3-benzenesulfonic acid;2-Amino-4-chloro-6-sulfophenol;2-Hydroxy-3-amino-5-chlorobenzenesulfonic acid;3-Amino-5-chloro-2-hydroxybenzenesulfonic acid;4-Chloro-2-aminophenol-6-sulfonic acid;5-Chloro-2-hydroxymetanilic acid;6-Amino-4-chloro-1-phenol-2-sulfonic acid;6-Amino-4-chlorophenol-2-sulfonicacid;Benzenesulfonicacid, 3-amino-5-chloro-2-hydroxy-;
EINECS: 201-813-5
Density: 1.79 g/cm3
Melting Point: 44-45°C(lit.)
Boiling Point: 150°C4mm Hg(lit.)
Flash Point: >230°F
Appearance: Off-white solid
Hazard Symbols: C
Risk Codes: 34
Safety: 22-24/25-26
PSA: 109.00000
LogP: 2.53650
Synthetic route
88-25-5

5-chloro-2-hydroxy-3-nitro-benzenesulfonic acid

88-23-3

2-amino-4-chlorophenol-6-sulfonic acid

95-85-2

2-hydroxy-5-chloro-aniline

88-23-3

2-amino-4-chlorophenol-6-sulfonic acid

Conditions
ConditionsYield
With sulfuric acid
With sulfuric acid
26488-93-7

N-(5-chloro-2-hydroxyphenyl)acetamide

88-23-3

2-amino-4-chlorophenol-6-sulfonic acid

Conditions
ConditionsYield
durch Sulfurieren und Verseifen des Reaktionsproduktes;
durch Sulfurien und Verseifen des Reaktionsproduktes;
88-23-3

2-amino-4-chlorophenol-6-sulfonic acid

123-54-6

acetylacetone

1246887-50-2

3-(5-chloro-2-hydroxy-3-sulfophenylhydrazo)pentane-2,4-dione

Conditions
ConditionsYield
Stage #1: 2-amino-4-chlorophenol-6-sulfonic acid With hydrogenchloride; sodium hydroxide; sodium nitrite In water at 0 - 5℃;
Stage #2: acetylacetone With sodium hydroxide In water Cooling with ice;
77%
88-23-3

2-amino-4-chlorophenol-6-sulfonic acid

93-91-4

1-phenylbutan-1,3-dione

1-phenyl-2-(2-hydroxy-3-sulfo-5-chlorophenylhydrazo)butane-1,3-dione

Conditions
ConditionsYield
Stage #1: 2-amino-4-chlorophenol-6-sulfonic acid With hydrogenchloride; sodium hydroxide; sodium nitrite In water at 0 - 5℃; Japp-Klingemann reaction;
Stage #2: 1-phenylbutan-1,3-dione With sodium acetate In ethanol; water Japp-Klingemann reaction; Cooling with ice;
77%
88-23-3

2-amino-4-chlorophenol-6-sulfonic acid

126-81-8

dimedone

1393845-94-7

5-chloro-3-(2-(4,4-dimethyl-2,6-dioxocyclohexylidene)hydrazinyl)-2-hydroxy-benzenesulfonic acid

Conditions
ConditionsYield
Stage #1: 2-amino-4-chlorophenol-6-sulfonic acid With sodium hydroxide; sodium nitrite In water at -0.16℃;
Stage #2: With hydrogenchloride In water at 4.84℃; for 1h;
Stage #3: dimedone With sodium hydroxide In ethanol; water at -0.16℃; Japp-Klingemann Hydrazone Synthesis;
75%
277299-70-4

2-(3,4-dimethylphenyl)-1,2-dihydro-5-methyl-3H-pyrazol-3-one

88-23-3

2-amino-4-chlorophenol-6-sulfonic acid

5-chloro-3-{[1-(3,4-dimethylphenyl)-5-hydroxy-3-methyl-1H-pyrazol-4-yl]azo}-2-hydroxybenzenesulfonic acid

Conditions
ConditionsYield
34%
75-44-5

phosgene

88-23-3

2-amino-4-chlorophenol-6-sulfonic acid

5-chloro-2-oxo-2,3-dihydro-benzoxazole-7-sulfonic acid

Conditions
ConditionsYield
With sodium hydroxide at 5 - 10℃;
121-02-8

2-methyl-5-nitrobenzene-1-sulfonyl chloride

88-23-3

2-amino-4-chlorophenol-6-sulfonic acid

6528-45-6

3-(4-amino-toluene-2-sulfonylamino)-5-chloro-2-hydroxy-benzenesulfonic acid

Conditions
ConditionsYield
nachfolgend Reduktion;
88-23-3

2-amino-4-chlorophenol-6-sulfonic acid

3-amino-5-chloro-2-hydroxy-benzenesulfonyl chloride

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Chemistry

 
IUPAC Name: 3-Amino-5-chloro-2-hydroxybenzenesulfonic acid
Molecular Formula: C6H6ClNO4S
Molecular Weight: 223.63 g/mol
Canonical SMILES: c1(c(c(cc(c1)Cl)N)O)S(O)(=O)=O
InChI: InChI=1/C6H6ClNO4S/c7-3-1-4(8)6(9)5(2-3)13(10,11)12/h1-2,9H,8H2,(H,10,11,12)
EINECS: 201-813-5
Product Categories: Intermediates of Dyes and Pigments
Solubility: Insoluble in water
XLogP3-AA: 0.8
H-Bond Donor: 3
H-Bond Acceptor: 5
Index of Refraction: 1.677
Molar Refractivity: 47.07 cm3
Molar Volume: 124.8 cm3
Polarizability: 18.66×10-24 cm3
Surface Tension: 86.2 dyne/cm
Density of 2-Amino-4-chlorophenol-6-sulfonic acid (CAS NO.88-23-3): 1.79 g/cm3

Safety Profile

Safety Statements of 2-Amino-4-chlorophenol-6-sulfonic acid (CAS NO.88-23-3): 22-24/25-26 
S22: Do not breathe dust. 
S24/25: Avoid contact with skin and eyes. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

Specification

 2-Amino-4-chlorophenol-6-sulfonic acid (CAS NO.88-23-3), its Synonyms are 2-Hydroxy-5-chlorometanilic acid ; 3-Amino-5-chloro-2-hydroxybenzenesulfonic acid ; 6-Amino-4-chlorophenol-2-sulfonic acid ; 3-Amino-5-chloro-2-hydroxybenzenesulphonic acid ; 6-Amino-4-chloro-1-phenol-2-sulfonic acid ; Benzenesulfonic acid, 3-amino-5-chloro-2-hydroxy- ; Metanilic acid, 5-chloro-2-hydroxy- (8CI) . It is off-white solid. It may be sensitive to prolonged exposure to air and/or light.