p-Toluenesulfonamide is an excellent solid plasticizer for thermosetting plastics, suitable for phenolic resin, melamine resin, urea-formaldehyde resin, polyamide and other resins. A small amount of blending can improve processability, make curing even, and give the product a good gloss. p-Toluenesulfonamide does not have the softening effect of liquid plasticizers, is incompatible with polyvinyl chloride and vinyl chloride copolymers, and is partially compatible with cellulose acetate, cellulose acetate butyrate and cellulose nitrate.

Chemical properties:

White flaky crystals. Soluble in ethanol, insoluble in water and ether.

production method

First, add part of the HN3 water into the reaction pot, add p-toluenesulfonyl chloride while stirring, and the temperature will naturally rise to above 50°C. After the temperature drops, add the remaining ammonia water. React at 85~90℃Chemicalbook for 0.5h. The reaction ends when the pH value reaches 8 to 9. Cool to 20°C, filter, and wash the filter cake with water to obtain crude product. The product is then decolorized by activated carbon, dissolved in alkali, separated by acid, filtered and dried to obtain the product.

p-Toluenesulfonamide Chemical Properties

CAS 70-55-3
Molecular formula C7H9NO2S
Molecular weight 171.22
EINECS No. 200-741-1

 
Melting point 134-137 °C (lit.)
Boiling point 221 °C (10 mmHg)

Density 1.2495 (rough estimate)
Vapor density 5.9 (vs air) Refractive index 1.6100 (estimate)
Flash point 202 °C

Net weight: 25kg, packed in cardboard drum. 50kg.

characteristic  ：White flaky crystals

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