A chemical salt or ester containing two sulfonic acid groups or sulfonate groups.
From dis- (two) + sulphonate, where sulphonate comes from sulfonic acid (sulfur + -onic + -ate), indicating a compound with two sulfur-based acid groups.
Disulphonates appear in industrial detergents and dyes—these two-sulfur compounds revolutionized textile manufacturing in the early 1900s and remain invisible workhorses in modern chemistry.
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