Sodium Polyacrylate – Exceptional Absorbent Material

Sodium polyacrylate is a versatile polymer widely utilized in everyday products such as diapers, pet pads, and as a soil water-retaining agent. Its standout feature is its remarkable absorbency:

  • Sodium polyacrylate can absorb hundreds of times its weight in water.
  • Initially a powder, it transforms into a gel upon contact with moisture.
  • Unlike traditional absorbents, this gel retains moisture effectively, making it ideal for applications like diapers, where it ensures comfort and leak prevention even after extended use.

Characteristics and Uses

Sodium polyacrylate appears as a white or light yellow solid block or powder, or as a colorless to light yellow viscous liquid. Key characteristics include:

  • Density: 1.32 g/mL at 25°C
  • Storage conditions: Should be stored between 2-8°C for optimal stability
  • Form: Available in solid and liquid forms
  • Chemical properties: Tasteless, swells in water, and soluble in aqueous caustic soda
  • In agriculture, potassium polyacrylate, known as hydrogel polymer, aids in water retention, reduces irrigation frequency, and enhances soil and plant performance without environmental harm.

Safety Considerations

Sodium polyacrylate is deemed safe for use:

  • It is non-toxic and poses minimal safety risks according to safety data sheets.
  • It is non-irritating to the skin due to its large molecular structure, which prevents absorption.
  • While trace amounts of acrylic acid may be present in some products, studies suggest these are well below harmful levels, ensuring safety even for baby products like diapers.

Handling and Precautions

Proper handling of sodium polyacrylate is essential:

  • Inhalation of the powder may irritate the lungs.
  • Spills can create slippery surfaces when exposed to water.
  • Large quantities in sewer systems can cause clogging and require immediate attention.


In conclusion, sodium polyacrylate is a safe and effective material with widespread applications due to its superior absorbency and minimal environmental imp act when used responsibly.

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