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98-32-8

Basic Information
CAS No.: 98-32-8
Name: 3-Amino-4-hydroxybenzenesulphonamide
Molecular Structure:
Molecular Structure of 98-32-8 (3-Amino-4-hydroxybenzenesulphonamide)
Formula: C6H8N2O3S
Molecular Weight: 188.207
Synonyms: 2-Amino-hydroxybenzene-4-sulphonamide;2Amino Phenol 4Sulphonamide;Metanilamide, 4-hydroxy-;Benzenesulfonamide, 3-amino-4-hydroxy-;3-Amino-4-hydroxybenzenesulfonamide;Metanilamide, 4-hydroxy- (8CI);4-Hydroxymetanilamide;Aminophenol sulfamide;2-Amino Phenol-4-Sulphonamide;
EINECS: 202-657-0
Density: 1.58 g/cm3
Melting Point: 199-201 °C
Boiling Point: 454.5 °C at 760 mmHg
Flash Point: 228.7 °C
Hazard Symbols: IrritantXi
Risk Codes: 36/37/38
Safety: 26-36
PSA: 114.79000
LogP: 1.98410
Synthetic route
24855-58-1

4-hydroxy-3-nitrobenzenesulfonamide

98-32-8

3-amino-4-hydroxybenzenesulfonamide

Conditions
ConditionsYield
With hydrogenchloride; zinc In ethanol Heating;
3-nitro-4-hydroxy-benzenesulfonamide-(1)

3-nitro-4-hydroxy-benzenesulfonamide-(1)

98-32-8

3-amino-4-hydroxybenzenesulfonamide

Conditions
ConditionsYield
With sodium hydroxide; sodium dithionite
With hydrogenchloride; tin
444-30-4

2-(trifluoromethyl)phenol

98-32-8

3-amino-4-hydroxybenzenesulfonamide

2-(2-hydroxyphenyl)benzo[d]oxazole-6-sulfonamide

Conditions
ConditionsYield
With sodium hydroxide In water at 80℃; for 2h;97%
40397-98-6

2,5-dimethylphenyl isocyanate

98-32-8

3-amino-4-hydroxybenzenesulfonamide

3-(3-(2,5-dimethylphenyl)ureido)-4-hydroxybenzenesulfonamide

Conditions
ConditionsYield
In acetonitrile at 20℃; Inert atmosphere;95%
463-71-8

thiophosgene

98-32-8

3-amino-4-hydroxybenzenesulfonamide

2-mercaptobenzooxazole-5-sulfonic acid amide

Conditions
ConditionsYield
In tetrahydrofuran at 20℃; for 5h;92%
In tetrahydrofuran at 0℃;66%
In tetrahydrofuran at 20℃; for 4h;
119072-55-8, 7188-38-7

tert-butylisonitrile

98-32-8

3-amino-4-hydroxybenzenesulfonamide

1427468-97-0

3-(tert-butylamino)-2-(tert-butylimino)-2H-benzo[b][1,4]oxazine-6-sulfonamide

Conditions
ConditionsYield
With palladium dichloride In 1,4-dioxane at 50℃; for 8h;86%
1195-45-5

para-fluorophenyl isocyanate

98-32-8

3-amino-4-hydroxybenzenesulfonamide

3-(3-(4-fluorophenyl)ureido)-4-hydroxybenzenesulfonamide

Conditions
ConditionsYield
In acetonitrile at 20℃; Inert atmosphere;86%
125329-54-6

hydrochloride of methyl iminoester of β-benzylthiopropionic acid

98-32-8

3-amino-4-hydroxybenzenesulfonamide

2-(2-Benzylsulfanyl-ethyl)-benzooxazole-5-sulfonic acid amide

Conditions
ConditionsYield
In ethanol for 4h; Heating;85%
119072-55-8, 7188-38-7

tert-butylisonitrile

98-32-8

3-amino-4-hydroxybenzenesulfonamide

1427468-77-6

2-(tert-butylamino)benzo[d]oxazole-5-sulfonamide

Conditions
ConditionsYield
With tetrakis(triphenylphosphine) palladium(0) In 1,4-dioxane at 50℃; for 8h;85%
614-68-6

2-tolyl isocyanate

98-32-8

3-amino-4-hydroxybenzenesulfonamide

4-hydroxy-3-(3-(o-tolyl)ureido)benzenesulfonamide

Conditions
ConditionsYield
In acetonitrile at 20℃; Inert atmosphere;85%
Raw Materials
24855-58-1
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Chemistry

IUPAC Name: 3-amino-4-hydroxybenzenesulfonamide 
Empirical Formula: C6H8N2O3S
Molecular Weight: 188.2043g/mol
EINECS: 202-657-0 
Structure of 2-Aminophenol-4-sulfonamide (CAS NO.98-32-8):

Index of Refraction: 1.667
Molar Refractivity: 44.33 cm3
Molar Volume: 119 cm3
Polarizability: 17.57×10-24cm3
Surface Tension: 80 dyne/cm
Density: 1.58 g/cm3
Flash Point: 228.7 °C
Enthalpy of Vaporization: 74.15 kJ/mol 
Melting Point: 199-201°C
Boiling Point: 454.5 °C at 760 mmHg
Vapour Pressure: 7.02E-09 mmHg at 25°C 
Product Categories: Intermediates of Dyes and Pigments;SULFONAMIDE;Benzene derivates 
Canonical SMILES: C1=CC(=C(C=C1S(=O)(=O)N)N)O
InChI: InChI=1S/C6H8N2O3S/c7-5-3-4(12(8,10)11)1-2-6(5)9/h1-3,9H,7H2,(H2,8,10,11)
InChIKey: AVQFHKYAVVQYQO-UHFFFAOYSA-N

Uses

 2-Aminophenol-4-sulfonamide(98-32-8) is used as reactive dye intermediates.

Safety Profile

Hazard Codes 2-Aminophenol-4-sulfonamide(98-32-8):  Xi
Risk Statements 2-Aminophenol-4-sulfonamide(98-32-8):
36/37/38:  Irritating to eyes, respiratory system and skin 
Safety Statements 2-Aminophenol-4-Sulfonamide(98-32-8):
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
36:  Wear suitable protective clothing 

Specification

  2-Aminophenol-4-sulfonamide , its cas register number is 98-32-8. It also can be called 3-Amino-4-hydroxybenzenesulfonamide ; Aminophenol sulfamide ; o-Aminophenol-p-sulfonamide .