ATMP.5Na, also known as the pentasodium salt of ATMP, is an organic phosphonic acid with the formula C3H7NO9P3Na5. It is a white crystalline powder, easily soluble in water and has excellent chelating, low threshold inhibition and crystal structure disruption properties. In this way, it prevents scale formation in water systems and prevents corrosion on metal surfaces.

The chemical and physical properties of ATMP.5Na are:

• Its molecular weight is 409 g/mol.
• Melting point 200 °C (disintegrates).
• It has no boiling point.
• Its density is 1.33 g/mL (20 °C).
• Its solubility in water is 61 g/100 mL.
• pKa value is 10.5.

The production method of ATMP.5Na is as follows:

• Mannich type reaction method: This is the most common production method of ATMP.5Na. ATMP is obtained by a Mannich-type reaction between ammonia, formaldehyde and phosphoric acid. The ATMP is then neutralized with sodium hydroxide and converted into ATMP.5Na.

Fields of use for ATMP.5Na include:

• Detergents and cleaning agents: ATMP.5Na chelates metal ions in detergents and cleaning agents, reducing hardness and preventing limescale stains.
• Water Treatment: ATMP.5Na is used as a scale inhibitor and corrosion inhibitor in industrial water treatment systems. It is particularly suitable for cooling water systems and oil refineries with high hardness, alkali and pH values.
• Metalworking: ATMP.5Na is used in metalworking for processes such as tinning, soldering and galvanizing. ATMP.5Na removes the oxide layer from metal surfaces and improves metal adhesion.
• Fertilizer production: ATMP.5Na is also used in fertilizer production. ATMP.5Na is a fertilizer that provides nitrogen to plants. It is especially suitable for plants that grow under water, such as rice.