Sodium Tripolyphosphate
ELRASATM – STPPl
Sodium Tripolyphosphate (STPP) is a white, crystalline powder widely used in various industries as a cleaning agent, water softener, and food additive. It is known for its ability to enhance the cleaning efficiency of detergents and is commonly used in household and industrial cleaning products. In the food industry, STPP acts as a preservative and emulsifier, improving texture and moisture retention in processed foods.
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CAS Number
7758-29-4
HS Code
28.35.31.00
Molecular Formula
Na₅P₃O₁₀
INCI Name
Sodium Tripolyphosphate
Sodium Tripolyphosphate
ELRASATM – STPPl
Sodium Tripolyphosphate (STPP) is a white, crystalline powder widely used in various industries as a cleaning agent, water softener, and food additive. It is known for its ability to enhance the cleaning efficiency of detergents and is commonly used in household and industrial…
CAS Number
7758-29-4
INCI Name
Sodium Tripolyphosphate
HS Code
28.35.31.00
Molecular Formula
Na₅P₃O₁₀
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Product Specification
Physical Properties
| Property | Specification |
|---|---|
| Ph | 1% soln @ 25 °C = 9.7-9.8 |
| Odor | Odorless |
| Density | 2.52 g/cm³ |
| Appearance | White solid |
| Refractive Index | 1.658 |
| Molecular Weight (G/Mol) | 367.86 |
| Ph (If Aqueous Solution) | 1% soln @ 25 °C = 9.7-9.8 |
| Density Or Specific Gravity | 2.52 g/cm³ |
Chemical Properties
| Property | Specification |
|---|---|
| Water Solubility | 20 g/100 mL (20 ºC) |
Thermal Properties
| Property | Specification |
|---|---|
| Melting Point | 622 °C |
Processing Methods & Reference Formulations
A. Hair Shampoo
STPP should be added to the water phase under stirring at room temperature or up to 40°C to ensure full dissolution before surfactants or thickeners are introduced. STPP works best and remains stable in slightly acidic to neutral pH.
| Key Ingredients | Indicative Dosage (% w/w) |
|---|---|
| Water | 65% |
| Sodium Laureth Sulfate | 15% |
| Cocamidopropyl Betaine | 5% |
| Glycerin | 3% |
| Sodium Tripolyphosphate | 3% |
| Polyquaternium-7 | 1% |
| Citric Acid | 0.2% |
| Methylisothiazolinone + Methylchloroisothiazolinone | 0.1% |
| Fragrance | 0.7% |
B. Laundry Detergent
For liquid detergents, it should be pre-dissolved in water before adding to the mix to avoid clumping. STPP works best in alkaline pH (9–10.5). Ensure the final formulation maintains this pH range for effective soil suspension and preventing redeposition on fabrics.
| Key Ingredients | Indicative Dosage (% w/w) |
|---|---|
| Water | 39.73% |
| Triethylenetetramine-N,N,N′,N″-penta(methylene phosphonic acid) | 3.3% |
| Sodium Hydroxide Solution | 3.3% |
| Sodium Tripolyphosphate | 3.3% |
| Sodium C12-14 Alcohol Ether Sulfate | 9% |
| Cocamidopropyl Betaine | 1.3% |
| Alcohol Ethoxylate (C12–C15) | 2% |
| Alkyl Amphocarboxyglycinate | 4% |
| Optical Brightener | 0.2% |
| Perfume | 0.2% |
| Opacifier (e.g., styrene/acrylic dispersion) | 0.067% |
| Enzymes, carriers, etc. | 0.135% |
C. Surface Cleaner
Incorporate STPP into the water phase early in the process and ensure it is fully dissolved before adding surfactants, to avoid precipitation or uneven distribution. STPP pairs well with surfactants like SLS, LAS, or alcohol ethoxylates, improving foam stability, detergency, and stain removal.
| Key Ingredients | Indicative Dosage (% w/w) |
|---|---|
| Water | 60% |
| Sodium Tripolyphosphate | 15% |
| Sodium Xylene Sulfonate | 5% |
| Nonylphenol Ethoxylate | 10% |
| Sodium Lauryl Sulfate | 5% |
| Cellulose Microparticles | 3% |
| Propylene Glycol | 2% |
| Butyl Glycol (co-solvent) | 2% |
| Preservative(s) & Fragrance | 1% |
Dosing Guidelines
A. Dosing by Application
| Products | Authorized dosage % |
|---|---|
| Laundry & Dishwashing Detergents | 15–35% |
| Industrial/Household Cleaners | 5-30% |
About Sodium Tripolyphosphate
Sodium Tripolyphosphate manufacturers and suppliers provide a versatile compound used extensively in cleaning, food processing, and water treatment industries. Known for its ability to soften water and enhance cleaning efficiency, STPP is a key ingredient in many household and industrial cleaning products. As a food additive, it helps retain moisture and improve texture in processed foods. Manufacturers focus on producing high-purity STPP to meet the stringent demands of various applications. The production process is carefully controlled to ensure consistency and stability, crucial for its effectiveness. With a growing emphasis on sustainability, manufacturers are adopting greener practices to minimize environmental impact, aligning with the demand for eco-friendly raw materials in the chemical industry.
Fusion of sodium phosphates with calcination (Yield: ~90–95%)
Fusion of sodium phosphates with calcination (Yield: ~90–95%) Raw Materials: NaH₂PO₄, Na₂HPO₄ Overall Formula: NaH₂PO₄ + 2 Na₂HPO₄ → Na₅P₃O₁₀ + 2 H₂O
About Sodium Tripolyphosphate
Sodium Tripolyphosphate manufacturers and suppliers provide a versatile compound used extensively in cleaning, food processing, and water treatment industries. Known for its ability to soften water and enhance cleaning efficiency, STPP is a key ingredient in many household and industrial cleaning products. As a food additive, it helps retain moisture and improve texture in processed foods. Manufacturers focus on producing high-purity STPP to meet the stringent demands of various applications. The production process is carefully controlled to ensure consistency and stability, crucial for its effectiveness. With a growing emphasis on sustainability, manufacturers are adopting greener practices to minimize environmental impact, aligning with the demand for eco-friendly raw materials in the chemical industry.
Fusion of sodium phosphates with calcination (Yield: ~90–95%)
Fusion of sodium phosphates with calcination (Yield: ~90–95%) Raw Materials: NaH₂PO₄, Na₂HPO₄ Overall Formula: NaH₂PO₄ + 2 Na₂HPO₄ → Na₅P₃O₁₀ + 2 H₂O
Regulatory Compliance
| Region | Max Allowed Level | Notes | Certification Body |
|---|---|---|---|
| Australia | - | No specific OEL for STPP. Not explicitly restricted or prohibited in cosmetics regulations | - |
| China | - | No specific OEL published for STPP | - |
| Japan | - | No specific OEL for STPP. Not listed among prohibited/restricted cosmetic ingredients | - |
| Korea, Republic of | - | No specific OEL for STPP. Not specifically restricted. | - |
| United States | - | No specific occupational exposure limit (OEL) for sodium tripolyphosphate. Not explicitly restricted or prohibited as a cosmetic ingredient. No maximum usage limit is set by the FDA | - |
| ASEAN | - | No specific limit for STPP. Not specifically restricted. | - |
| European Union | - | No specific OEL for STPP. No mandatory maximum limit. | - |
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