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4-Toluene Sulfonamide (PTSA)


(4-Methylphenyl)sulfonamide; 4-methylbenzenesulfonamidate;
4-Methylbenzenesulfonamide; 4-Sulfamoyltoluene;
4-Methylbenzenesulphonamide; 4-Toluenesulfanamide;
4-Toluenesulfonic acid, amide; N-tosyl amine; N-tosylamine;
para-Toluenesulfonamide p-Methylbenzenesulfonamide;
p-toluene sulfonamide; p-Toluenesulfamide; p-Toluenesulfanamide;
p-Toluenesulfonylamide p-Toluenesulphonamide; p-toluensulfonamide;
p-Tolylsulfonamide; Tolouen-4-sulfonamide; Toluene-4-sulfonamide;
Toluene-4-sulphonamide; toluene-p-sulfonamide; Toluene-p-sulphonamide;
Toluenesulfonamide; toluenesulphonamide; Tolylsulfonamide

Technical Data

CAS Number: 70-55-3
Molecular Formula: C7H9NO2S
Molecular Weight: 171.22
Beilstein Registry Number: 472689
EC Number 200-741-1

FabriChem Specifications

AppearanceWhite crystalline
Assay99.5% Min.
Melting Point136—140°C
Moisture0.2% Max.
Color (APHA)20 Max.
o-Toluene Sulfonamide 0.2% Max.
Turbidity 10 Max.
pH5.0 — 7.0
Chloride0.01% Max.
Sulfate0.02% Max.
Meta Toluene Sulfonamide 0.1% Max.
Heavy Metal20 ppm Max

Molecular Structure



4-Toluene Sulfonamide (PTSA) [p-Toluenesulfonamide] has been employed for the following uses:

• as nucleophile during tetrabutylammonium fluoride (TBAF) catalyzed vinyl aziridine opening reaction

• as reagent during selective aziridination of olefins catalyzed by dirhodium (II) caprolactamate