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2-Naphthalenesulfonic acid

Β-sodium naphthalene sulfonate formaldehyde condensate is a naphthalene anionic surfactant made from refined naphthalene or industrial naphthalene through sulfonation, hydrolysis, condensation and other steps.It is widely used as a coating dispersant, dyeing and cement water reducer.

Synonyms: 2-Naphthalenesulfonic acid,

Molecular formula: (C10H8O3S.CH2O)x.xNa

CAS No: 532-02-5



In In the concrete construction industry, it is used as a water reducer for cement concrete, which significantly improves the initial strength and drying time of cement.

In In the textile industry, it can be used as a dye for textile dyeing.

In In the leather industry, it can be used as a softener.

In In the rubber industry, it can be used as a stabilizer.


HS CodeCAS No.FormulaShelf Life
3824401036290-04-72(C10H6SO3Na)•(n-1)CH2•(n-2)(C10H5SO3Na)12 months

Brown PowderBrown PowderBrown Powder
Flow ability nm≥230≥230≥210
Solid content %≥91≥91≥91
Na2SO4 content%<5<18<25
Fineness 0.315mm%<15<15<15
Surface tension ×10-3 N/M70±170±170±1
Chloride %≤0.3≤0.5≤2.5
Insoluble matter 40%,4H%≤0.5≤2≤2

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