General data

Naphthalene sulfonate (often as Sodium Naphthalene Sulfonate Formaldehyde, or SNF) is a yellowish-brown, water-soluble anionic polymer used primarily as a high-range water reducer (superplasticizer) in concrete to improve flowability and strength. It is also extensively used as a dispersing agent in textiles, agrochemicals, and industrial cleaners.

Key Uses and Applications:

• Construction & Concrete: Acts as a superplasticizer to create high-strength, low-permeability concrete, reducing water requirements by 10–25% while improving workability and reducing cracking. It is used in, for example, the Burj Khalifa and Three Gorges Dam projects.
• Gypsum/Drywall: Used in plasterboard/drywall manufacturing to reduce water in the stucco mix.
• Textile Industry: Serves as a dispersant for dyes and pigments, improving leveling and color uniformity in dyeing processes.
• Industrial Cleaners & Detergents: Acts as an anionic surfactant, breaking down grease, oil, and dirt in industrial, automotive, and household cleaning products.
• Agrochemicals: Used in agricultural formulations to enhance the wetting and dispersion of pesticides and fertilizers.
• Leather Tanning: Facilitates the uniform penetration of tanning agents and dyes.
• Properties and Characteristics:
• Dispersing Agent: Excellent ability to keep particles suspended in water.
• High Stability: Maintains effectiveness at high temperatures (above 100 °C) and over a wide pH range (pH 2–12).
• Compatibility: Compatible with various cements, admixtures, and water-based systems.