Sodium naphthalene formaldehyde

About Sodium naphthalene formaldehyde

Laizhou Guangsheng Chemical Building Materials Co., Ltd. Naphthalene-based High-Range Water Reducer Product Introduction

Our product is a sodium naphthalene sulfonate formaldehyde condensate (SNF/PNS/FDN/NSF), naphthalene based high-performance water-reducing admixture for concrete. We offer various models including Type A (sodium sulfate content 5%), Type B (sodium sulfate content 10%), and Type C (sodium sulfate content 20%) to meet different project requirements regarding alkali content, cost, and adaptability.

I. Physical and Chemical Properties

Appearance: Brownish powder

Solid Content: 92%

PH Value (5% aqueous solution): 7.0 9.0 (Neutral to slightly alkaline)

Sodium Sulfate Content: Type A 5%, Type B 10%, Type C 20%, effectively controlling alkali-aggregate reaction

Chloride Ion Content:  0.2%, non-corrosive to steel reinforcement

Fineness (Residue on 0.315mm sieve):  5%, good flowability and easy dissolution

II. Main Performance Characteristics

Under the recommended dosage (0.5% 1.0% of cementitious material weight), the product exhibits the following properties:

High Water Reduction Rate: 18% 25%, significantly reducing the water-to-binder ratio and increasing density.

Excellent Workability: Bleeding rate ratio 90%, air content < 3.0%, improves workability and is non-air-entraining.

Excellent Strength Development: Compressive strength ratio 150% at 1 day, 145% at 3 days, 130% at 7 days, and 120% at 28 days

Durability Assurance: 28-day shrinkage ratio 125, complies with national standards

Controllable Setting Time: Suitable model can be selected based on project needs to adjust the setting time

III. Applications and Usage Instructions

This product is widely used in various concrete projects including precast components, bridges, roads, ports, hydropower projects, and industrial and civil buildings. Laboratory trials are recommended to determine the optimal dosage for use. The product is packaged in plastic-lined woven bags, commonly in 25 kg/bag, with 650 kg ton bags also available upon request. It should be stored in a cool, dry place and has a shelf life of 12 months.

Note: The above data are test results under standard laboratory conditions. Actual performance may vary depending on materials, mix proportions, and construction environment. Please contact our company for detailed technical data sheets for specific types or technical support.

Laizhou Guangsheng Chemical Building Materials Co., Ltd. is a high-tech enterprise specializing in the research, production, and sales of concrete admixtures. Equipped with advanced production technology and a comprehensive quality management system, the company operates a modern production line with an annual capacity of 100,000 tons of Naphthalene Sulfonate Formaldehyde Condensate (SNF/PNS/FDN/NSF-based high-range water reducer). Our production scale and product quality are leading in the industry.

The company's main product, naphthalene based high-range water reducer, features high water reduction rate, excellent strength enhancement, and low alkali content. It effectively improves the workability, strength, and durability of concrete, making it widely suitable for various precast and cast-in-place concrete projects, especially for high-strength and high-performance concrete applications. To meet diverse customer needs, we offer multiple product models (e.g., Type A, B, C) and can provide customized solutions tailored to specific project requirements.

Thanks to consistent product quality and excellent service, our products are well-received not only in the domestic market but also exported to numerous countries and regions across the Middle East, India, the Americas, and Asia, earning long-term trust and cooperation from global clients.

We sincerely welcome all potential customers to visit our factory for inspection and business discussions. Let's work together to create a successful future.

High Water Reduction & Superior Workability

Sodium naphthalene formaldehyde is renowned for its high water-reducing rate, which allows the production of high-strength concrete with improved flow and workability. By reducing water content without degrading the concrete's consistency, SNF enhances overall performance and durability, making it an essential additive for modern construction projects, from precast elements to cast-in-situ structures.


Flexible Packaging & Extended Shelf Life

Supplied in 25 kg bags or tailored packaging options, SNF is designed to suit diverse industry needs. With a shelf life of 12 months from manufacture, it remains effective if kept in a dry and well-ventilated location, away from moisture. Proper storage ensures the product retains its water-reducing and dispersing capabilities, preserving quality for long-term use.