Chemical Type(s)

Description

Tetrapotassium Pyrophosphate (TKPP)

Chemical Name: Tetrapotassium diphosphate

Chemical Formula: K₄P₂O₇

Appearance: White crystalline powder or granules

CAS Number: 7320-34-5

Molecular Weight: 330.14 g/mol

Properties:

  • Solubility: Highly soluble in water
  • pH: Alkaline
  • Hygroscopicity: Hygroscopic (absorbs moisture from the air)
  • Stability: Stable under normal conditions

Uses:

  • Detergents:
    • Used as a builder in detergents to enhance cleaning performance by:
      • Softening hard water (sequestering calcium and magnesium ions)
      • Improving surfactant effectiveness
      • Dispersing soil and preventing redeposition
  • Food Industry:
    • Used as a food additive (E450i) in various applications:
      • As a stabilizer and emulsifier in processed foods
      • To control acidity and maintain pH
      • To improve the texture and consistency of certain foods
  • Industrial Applications:
    • Used in various industrial processes, including:
      • Water treatment (corrosion inhibition, scale prevention)
      • Textile dyeing and printing
      • Paper manufacturing
      • Metal cleaning and finishing

Handling and Storage:

  • Handling:
    • Wear appropriate personal protective equipment (PPE), including gloves, eye protection, and respiratory protection.
    • Avoid inhalation of dust.
    • Avoid contact with skin and eyes.
    • Handle with care to prevent spills and dust generation.
  • Storage:
    • Store in a cool, dry, well-ventilated area.
    • Keep containers tightly closed.
    • Store away from incompatible materials.

Safety Information:

  • Irritant: May cause skin and eye irritation.
  • Inhalation: May cause respiratory irritation.
  • Ingestion: May cause gastrointestinal irritation.
  • Refer to the Safety Data Sheet (SDS) for detailed information on hazards, handling, storage, and emergency procedures.