4,4′-diaminodiphenyl sulfone, English name diamino diphenyl sulfone, also known as 4,4′-diphenyl sulfone diamine, dapsone, bis(4-aminophenyl) sulfone, referred to as DDS, molecular weight 248.30. A white or light yellow crystalline powder that oxidizes to a reddish color when exposed to air or light. The relative density is 1.33. The temperature of 175 ~ 181 ° C. It has high thermal stability in air and starts to decompose slowly at 280 °C. Soluble in ethanol, acetone, chloroform, acetonitrile and dilute hydrochloric acid, almost insoluble in water. The molecular structure of DDS contains an electron-withdrawing sulfone group, resulting in a lower reactivity than DDM and a lower degree of reaction with epoxy resin. Low toxicity.
More About 4,4′-DDS：
Density:1.2701 (rough estimate)
|Melting point||175-177 °C(lit.)|
|Loss on drying||≤0.5%|
Use Of 4,4′-DDS:
Used as an intermediate in medicine and polymer materials. The drug of choice for the treatment of leprosy can also be combined with other drugs that inhibit leprosy. Industrially used as a curing agent for epoxy resins. Used as a gas chromatographic fixative, organic synthesis intermediate and epoxy resin curing agent. Used in the synthesis of polysulfone amide resins and other polymers, anti-leprosy drugs.
Package Of 4,4′-DDS:
Storage:Stored in a closed, low temperature, heated to decompose into ammonia and acetic acid