| Molecular Formula | (C11H7O4SNa)n |
| PH | pH (20g/l, 25℃) : 6.0～9.0 |
| Sensitive | 0: forms stable aqueous solutions |
| Physical and Chemical Properties | This product is brown or dark brown powder. Soluble in water. Acid-resistant, alkali-resistant, hard water-resistant. It has good diffusion properties and is more resistant to high temperatures than the diffusion agent NNO. Prevent moisture absorption during storage. |
| Risk Codes | 36/38 - Irritating to eyes and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| TSCA | Yes |
| Toxicity | LD50 oral in rat: 3800mg/kg |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | sodium polynaphthalene formaldehyde sulfonate is a brown or dark brown powder. Commonly used in bulk dyes, reactive dyes, pesticide diffusion agents, fillers, leather tanning agents, construction cement concrete water reducer, used as oil well cement water reducer, etc. This product is used as dispersant and leveling agent for disperse dyes, reactive dyes and vat dyes. Pesticide dispersant, water reducing agent for cement concrete. used as diffusion agent, filler, dye dispersant, leather tanning agent, construction water reducing agent used as oil well cement water reducing agent. this product is a diluent, which is used to control pulp rot in paper industry, reduce two sides, improve filler or fine fiber retention rate, improve sizing and reduce coating viscosity. Used as an efficient dispersant for water-based coatings and pigment pastes. It is used as a color paste dispersant in latex paints of acrylic acid series, aldehyde propylene series and chlorine bias series. It can also be used as adhesive, polymer filling powder and sealing layer to improve water resistance. |
| production method | the preparation process of this product is sulfonation of naphthalene, condensation of sulfonation products with formaldehyde, and neutralization. 550kg of refined naphthalene was put into a reaction kettle, the temperature was raised to 50 ℃, and the reaction was carried out for 4 hours. Then cool down and pass water vapor to hydrolyze by-products to obtain 1-naphthalenesulfonic acid. After hydrolysis is completed, the material is fed into a polycondensation kettle, 37% formaldehyde aqueous solution is added, and the reaction is carried out at 196 kPa pressure. Finally, add alkali and neutralize to pH 8~10. The reaction ends. Cooling crystallization, filtering out the crude product and drying it into the finished product. the preparation process includes three steps: sulfonation of methyl naphthalene, condensation of sulfonated products with formaldehyde, and neutralization. Put 500kg of methyl naphthalene into a sulfonation kettle, heat and melt, start stirring, and raise the temperature to reaction 2 at 130~140 ℃. Then 210L of water is added under rapid stirring, and the acidity is measured after stirring for half an hour. If the total acidity is 25% ~ 27%, it is qualified. Cool to 90~100 ℃. 300kg of 37% formaldehyde aqueous solution was added at a time. Natural temperature rise and pressure rise, control the reaction temperature at 130~140 ℃ and the pressure at 0.15~0.20MPa. The reaction is 2h to allow it to be fully condensed. After condensation is completed, 30% lye is added for neutralization until the pH value is about 7. Finally, the crystal is cooled, filtered, and dried. The crystal is the finished product. |
| category | toxic substances |
| toxicity classification | poisoning |
| acute toxicity | oral-rat LD50: 3800 mg/kg; Oral-mouse LD50: 3400 mg/kg |
| flammability hazard characteristics | Thermal decomposition discharges toxic sulfur oxides and nitrogen oxide gases |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| fire extinguishing agent | water, dry powder, dry sand, carbon dioxide, foam, 1211 fire extinguishing agent |