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Chemical Identity: Dispersant NNO (CAS No. 9084-06-4) Description: Dispersant NNO, also known as sodium salt of naphthalenesulfonic acid formaldehyde condensate, is an anionic surfactant commonly used as a dispersing agent in various industrial applications, including the production of concrete admixtures, ceramic slurries, and textile dyes.

Physical Properties: Description: Dispersant NNO typically appears as a light brown to dark brown powder or granules. It is highly soluble in water, forming clear to slightly cloudy solutions. Its solubility and viscosity may vary depending on the concentration and formulation.

Chemical Structure: Description: The chemical structure of dispersant NNO consists of naphthalene sulfonic acid groups attached to a formaldehyde-condensed backbone, with sodium ions (Na+) as counterions. It is an anionic surfactant with hydrophilic and hydrophobic properties.

Synthesis Method: Description: Dispersant NNO is synthesized through the condensation reaction between naphthalenesulfonic acid and formaldehyde, followed by neutralization with sodium hydroxide. The reaction yields the sodium salt of the naphthalenesulfonic acid formaldehyde condensate.

Applications in Concrete Admixtures: Description: Dispersant NNO is widely used in the construction industry as a dispersing agent in concrete admixtures. It improves the workability and flowability of concrete mixes, reduces water content, and enhances the dispersion of cement particles, resulting in improved strength and durability of concrete structures.

Ceramic Slurries and Pigments: Description: Dispersant NNO is utilized in the ceramics industry for the preparation of ceramic slurries and pigments. It helps to disperse ceramic particles evenly in water-based formulations, improve rheological properties, and prevent settling and agglomeration during processing and firing.

Textile Dyes and Pigments: Description: Dispersant NNO is employed in the textile industry as a dispersing agent for textile dyes and pigments. It enhances the dispersion and stability of colorants in dyeing and printing processes, resulting in uniform coloration and improved color fastness on textile substrates.

Performance Characteristics: Description: Dispersant NNO exhibits excellent dispersing and wetting properties, allowing it to reduce the viscosity of suspensions, increase fluidity, and promote particle dispersion and suspension stability. It improves the processing efficiency and quality of various industrial formulations.

Toxicological Considerations: Description: Dispersant NNO is generally regarded as safe for use in industrial applications when handled according to recommended guidelines. However, direct contact with concentrated solutions may cause skin and eye irritation. Proper handling procedures should be followed to minimize risks.

Regulatory Status: Description: Dispersant NNO may be subject to regulations and guidelines imposed by government agencies depending on its specific application and use. Compliance with regulatory requirements is necessary for its safe handling, transportation, and disposal.