Sodium hexametaphosphate ( sodium cyclo-hexaphosphate ) SHMP [ CAS: 68915-31-1 ] - 25 000g

SODIUM HEXAMETAPHOSPHATE (SHMP)

>Numer WE: 233-343-1
>Numer CAS: 10124-56-8

Appearance White crystals
Odor odorless
Density 2.484 g/cm3
Melting point 628 °C
Boiling point 1,500 °C

Chemical Formula: (NaPO₃)₆
Molar Mass: 611.77 g/mol

Sodium Hexametaphosphate (SHMP) is a white, odorless, crystalline or powdery inorganic compound that belongs to the metaphosphate class of polyphosphates. It is a sodium salt of a polyphosphate chain, typically represented as a mixture of polymeric metaphosphates. SHMP is widely known for its exceptional sequestration properties and versatility in industrial applications.

Physical and Chemical Properties

• Appearance: White granular or powdered solid.
• Solubility: Highly soluble in water; forms a viscous, alkaline solution.
• pH: Typically 6.0 to 8.0 for a 1% aqueous solution.
• Melting Point: Decomposes at high temperatures before melting.
• Hygroscopic Nature: Absorbs moisture from the air, which may lead to clumping if improperly stored.

Applications

Sodium Hexametaphosphate has a broad range of applications across various industries due to its ability to sequester metal ions, emulsify, and stabilize.

1. Water Treatment

• SHMP is commonly used in water softening and water treatment processes as it prevents the formation of scale and precipitates by sequestering calcium and magnesium ions.
• It is also applied in boiler water treatment to prevent scale deposition.

2. Detergents and Cleaning Agents

• As a key ingredient in detergents, SHMP enhances cleaning efficiency by chelating hard water ions, preventing soap scum and scale buildup.
• It is widely used in industrial cleaners, dishwashing formulations, and laundry detergents.

3. Ceramic and Industrial Applications

• SHMP is a vital additive in the production of ceramics to disperse clay particles uniformly.
• In metallurgy, it is used as a dispersant and deflocculant.

4. Personal Care Products

• SHMP is a common ingredient in toothpaste formulations, acting as a plaque-dispersing and whitening agent.

5. Oil and Gas Industry

• It is used in oil well drilling fluids as a dispersing agent to enhance fluid stability and prevent aggregation of solid particles.

Benefits and Functional Properties

• Chelating Agent: SHMP binds with metal ions, preventing their interference in processes like cleaning, emulsifying, or industrial stabilization.
• Water Softening: Removes hardness-causing ions like calcium and magnesium.
• Dispersant: Prevents clumping of particles in suspensions, enhancing the uniformity of mixtures.
• Stabilizer: Helps maintain consistency in industrial formulations.

Health and Safety

Handling and Storage

• Storage: Store in a cool, dry, and well-ventilated area. Protect from moisture and humidity to avoid clumping.
• Precautions: Use personal protective equipment (PPE) such as gloves, goggles, and dust masks when handling large quantities.

Toxicity

• Overexposure to SHMP dust may cause respiratory irritation or discomfort. Prolonged contact with skin or eyes may lead to irritation.

Environmental Considerations

• SHMP can contribute to eutrophication in water bodies when discharged in large amounts due to its high phosphorus content. Efforts should be made to control its release into the environment.

SAFETY:

Label Elements:

None required according to GHS