Naphthalenesulfonates are derivatives of sulfonic acid that contain a naphthalene functional unit. A subfamily of compounds are the aminonaphthalenesulfonic acids, which describes precursors to several azo dyes. [1] [2]
- Naphthalenesulfonates
amaranth dye, an azo dye
amido black, a azo dye
congo red, a popular azo dye
trypan blue, an azo dye
suramin, a medication used to treat African sleeping sickness and river blindness
Naphthalenesulfonate/formaldehyde superplasticizer
The alkylnaphthalene sulfonates are used as superplasticizers in concrete. They are produced on a large scale by condensation of naphthalenesulfonate or alkylnaphthalenesulfonates with formaldehyde. Also called water reducers, they improves the flowability of concrete (before it sets), which allows for high-strength, high-performance concrete and mortar with lower water-to-cement ratios. [3]
