Sodium Naphthalene Formaldehyde is light yellow to yellow-brown powder, an anionic surfactant. sodium naphthalene formaldehyde is soluble in water, acid, alkali and hard water, good dispersion properties. With protein and polyamide fibers have affinity.

Mainly used to coloring for vat dyes, reactive dyes, acid dyes, acid staining pad or pigment pad dyeing of the dispersing agent, as a auxiliaries for vat dyes's powder or sizing agent. Also used staining to levelling agent and auxiliary tanning agent in leather industry. 

No corrosion products on steel. Widely used in concrete works, precast, sleepers, bridges, tunnels, military engineering, hydraulic engineering, port and airstrip, high-rise building, etc