Overview
p-Toluenesulfonamide (CAS 70-55-3 ), also known as p-tosylamide, is a sulfonamide compound used primarily as a biocide and plasticizer intermediate across industrial processing sectors.
It functions as an antimicrobial agent in water-based systems and as a chemical building block in polymer and resin formulations. In water treatment, it controls microbial growth in cooling towers.
It is used in industrial process water and recirculating systems where biological fouling is a persistent operational problem. Textile and leather processors use it as a preservative in finishing baths.
It is utilized in coating formulations to extend the working life of aqueous preparations. In plastics, it acts as a plasticizer or modifier intermediate, particularly in the production of resins.
These sulfonamide-based resins are used for coatings and adhesives. Paper manufacturers incorporate it into process water treatment programs to suppress bacterial and fungal contamination during pulp processing.
p-Toluenesulfonamide is supplied as a white crystalline powder or fine granules. Technical grade is the standard commercial form, with purity levels typically at 99% or above for industrial applications.
Packaging is available in bags and drums suited to bulk industrial procurement requirements. This ensures safe handling and efficient storage for large-scale manufacturing and chemical processing facilities.
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Physical Properties
| Melting Point | 138.5 °C |
| Boiling Point | 214 °C @ Press: 9.98 Torr |
| Density | 1.2495 (rough estimate) |
| Flash Point | 202 °C |
| Appearance | White leaflets. Soluble in alcohol; very slightly soluble inwater.Combustible. |
| Color | White |
| Odor | Odorless |
| Form | Crystalline Powder |
| Water Solubility | 0.32 g/100 mL (25 º C) |
| Refractive Index | 1.6100 (estimate) |
| Log P | 0.820 |
Safety & Handling
Warning GHS07 Hazard Statements H319 Causes serious eye irritation Precautionary Statements P280 Wear protective gloves/protective clothing/eye protection/face protection. P264+P265 Wash … thoroughly after handling. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29350090 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 1 |
Other Names
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Chemical Properties
- CAS Number
- 70-55-3
- EC Number
- 200-741-1
- Mol. Weight
- 171.22
- HS Code
- 29350090
- Category
- Amines