Dispersant NNO is an anionic surfactant with excellent dispersing and wetting properties. Its main component is a water-soluble polymer formed by the condensation of β-naphthalenesulfonic acid and formaldehyde.   2. Physical properties Appearance: light yellow or brown powder or liquid Solubility: easily soluble in water, insoluble in organic solvents pH value (1% aqueous solution): about 7-9 Ionicity: anionic Thermal stability: good, heat resistance is better than some ordinary dispersants Compatibility: can be used with other anionic or non-ionic surfactants 3. Main functions Dispersing effect: prevent solid particles (such as pigments, dyes, mineral powders, etc.) from agglomerating and settling in liquids. Wetting effect: reduce the surface tension of the liquid and improve the dispersibility of solid particles in the liquid phase. Improving fluidity: reducing the viscosity of the slurry, improving fluidity and stability. Electrolyte stability: has a certain tolerance to acid, alkali and hard water. 4. Main application areas Dye and pigment industry As a dispersant for dyes (such as disperse dyes and reactive dyes), it improves dyeing uniformity and stability. Used in coatings, inks, textile printing and dyeing systems, improves pigment dispersion and prevents sedimentation. Rubber and synthetic emulsion industry As a dispersant stabilizer for emulsion polymerization such as SBR (styrene-butadiene rubber) and NBR (nitrile-butadiene rubber). Enhance the stability of latex, prevent coagulation and sedimentation, and improve product quality. Concrete and building materials As a cement water reducer, it improves the fluidity of concrete, reduces the amount of cement, and enhances the strength of concrete. Improve the dispersibility of cement paste and improve construction performance. Pesticide industry As a dispersant for pesticide wettable powders (WP) and water-dispersible granules (WDG), it improves the dispersibility and suspension of pesticides in water. Papermaking and ceramic industry Improve the dispersion of fillers and pigments in the papermaking process and improve the uniformity of paper. Used for the dispersion of porcelain mud and glaze in ceramic production to improve molding quality. 5. Advantages and limitations ✅ Advantages:   Strong dispersibility, suitable for a wide range of water-based systems. Cost-effective, easy for large-scale industrial applications. Has a certain electrolyte resistance and can be used under different pH conditions. ⚠ Limitations:   Stability may be affected to a certain extent under high temperature or strong acid and alkali environment. Poor compatibility with some special polymer materials, need to be used with other dispersants. 6. Typical dosage In dye and pigment dispersion, the commonly used dosage is 0.5%-3% (relative to solid particles). In the concrete and cement industry, the dosage as a water reducer is generally 0.2%-1.5% (relative to cement mass). Summary Dispersant NNO is a commonly used anionic dispersant, mainly used in dyes, pigments, rubber, construction, ceramics and other fields. Its core function is to disperse solid particles, prevent sedimentation, improve stability and fluidity, and perform well in water-based systems