p-Toluenesulfonamide_CAS 70-55-3_High-Quality PTS Manufacturer

p-Toluenesulfonamide (PTS) is an organic compound with the chemical formula C7H9NO2S. It is also known by its systematic name, 4-methylbenzenesulfonamide. PTS belongs to the class of compounds known as sulfonamides, which are derivatives of sulfonic acid containing the functional group -SO2NH2 attached to an aromatic hydrocarbon.

Physical Properties

Color: White
Shape: Crystalline solid
Odor: Slight aromatic smell
Density: Approximately 1.30 g/cm³
Melting Point: 136-140°C
Boiling Point: Decomposes before boiling
Flash Point: 165°C (open cup)
Solubility: Slightly soluble in water; soluble in ethanol, acetone, and other organic solvents
Refractive Index: 1.571 (estimated)
Electrical Conductivity: Low conductivity, typical of organic insulators

Chemical Properties

PTS exhibits good thermal stability and is relatively inert under normal conditions. It does not readily undergo oxidation or reduction reactions. Its sulfonamide group can participate in various chemical reactions, such as nucleophilic substitution, due to the presence of an electrophilic sulfur atom.

Synthesis Methods

PTS is typically synthesized through the sulfonation of toluene to produce p-toluenesulfonyl chloride, followed by subsequent amination with ammonia or an amine.

Applications and Functions

PTS is used in various applications, including:

As a plasticizer in the production of plastics
In the synthesis of dyes and pigments
As a brightening agent in electroplating solutions
In the manufacture of synthetic resins and coatings
As a raw material for pharmaceuticals and agrochemicals

Safety and Storage

PTS should be stored in a cool, dry place, away from sources of ignition and incompatible materials such as strong oxidizing agents. It should be handled with appropriate personal protective equipment to avoid inhalation, ingestion, or skin contact.