Sodium naphthalene formaldehyde often referred to as SNF or SNF superplasticizer, is a chemical compound that falls under the category of superplasticizers or high-range water reducers. Also known as sodium naphthol formaldehyde is an organic compound with the formula C10H7CH2ONa. It is the sodium salt of the condensation product of naphthol and formaldehyde.Superplasticizers are admixtures added to concrete or cement mixtures to improve their workability and performance properties. They enable concrete to maintain its fluidity while reducing the water content, which in turn increases its strength, durability, and other mechanical properties.

Sodium naphthalene formaldehyde is typically synthesized by condensing naphthalene with formaldehyde in the presence of sodium hydroxide. The resulting product is a brown powder that is highly soluble in water. When added to concrete mixtures, SNF disperses the cement particles, allowing for greater flow without increasing the water-to-cement ratio. This results in improved workability, reduced water demand, enhanced strength development, and decreased porosity of the hardened concrete.

SNF is widely used in the construction industry to achieve concrete with high-performance characteristics. It’s commonly employed in applications where high-strength and durable concrete is required, such as in the construction of bridges, high-rise buildings, and infrastructure projects. By effectively reducing the water content in the mixture without compromising workability, SNF contributes to the overall quality and longevity of concrete structures.

Some key information about sodium naphthalene formaldehyde:

  • It is a white, crystalline powder.
  • It is formed by the reaction of naphthol (C10H7OH) with formaldehyde (CH2O) in the presence of sodium hydroxide.
  • It acts as a dispersing agent and has surfactant properties.
  • It is soluble in water and polar organic solvents like ethanol.
  • It is used industrially in dyeing and printing textiles, as a dispersing agent for dyes, pigments, and optical brightening agents.
  • It allows uniform dyeing by reducing the surface tension of the dye bath and prevents agglomeration of pigment particles.
  • It is also used as a synthetic tanning agent in leather production.
  • In the oil industry, it is used as a surfactant in drilling muds and as a corrosion inhibitor.

So in summary, sodium naphthalene formaldehyde is an important surfactant compound derived from naphthol and formaldehyde, with wide industrial applications as a dispersant and dyeing aid. Its sodium salt improves water solubility and compatibility in various processes.