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Sodium Tripolyphosphate Light Density STPP

SoapGoods Inc
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About Sodium Tripolyphosphate

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  • Synonyms: Sodium Tripolyphosphate, STPP, Sodium Tripolyphosphate Light, Sodium Tripolyphosphate Light (STPP), Pentasodium tripolyphosphate Anhydrous, Sodium tripolyphosphate pentabasic
  • INCI Name: Sodium Tripolyphosphate
  • CAS: 7758-29-4
  • Einecs: 231-838-7

The Science

  • Purity: 94% by weight
  • Density: Light
  • Viscosity: Solid
  • Solublity: Soluble in water
  • Storage: Cool, dark dry area, air tight container preferred


  • Appearance: Fine white granules
  • Odor: Low to no odor
  • Natural: Synthetic
  • Packaging:
  • Shelf life: Suggested retest date 2 year from purchase

Usage / Benefits

  • Industries: Detergents and cleaning products, ceramics, water treatment, textiles, leather tanning, metal processing, paints and coatings, food processing, petroleum, paper and pulp production, agriculture.
  • Applications: Water softening, detergent builder, emulsifying agent, preservative, dispersion agent, sequestering agent, flame retardant, texture modifier, pH buffer, viscosity modifier, food texture enhancer.
  • Benefits: Enhanced cleaning efficiency, prevents mineral buildup, improves texture of foods, stabilizes pH levels, increases shelf life of products, improves consistency in cosmetics and personal care products, binds metal ions, reduces corrosion, enhances moisture retention.
  • Products Uses: Detergents, water softeners, dishwashing tablets, meat processing, seafood and poultry applications, toothpaste, shampoos, bath products, textile processing, ceramic tiles, paper production, leather tanning, metal treatment, anti-corrosion agents, food preservation.
  • Safety: Generally safe, however keep out of eyes and do not eat.
  • Cautions: Not for ingestion, keep away from pets and children who may attempt to eat.
  • External Use Only: Even if food grade, we do not provide items for ingestion, all of our items are for external use only.

Sodium Tripolyphosphate

Normally used in commercial detergents. Highly charged chelating agent. STPP is widely used in regular and compact laundry detergents and automatic dishwashing detergents (in powder, liquid, gel and/or tablet form), toilet cleaners, surface cleaners, and coffee urn cleaners.

It also provides a number of chemical functions including: sequestration of "water hardness", enabling surfactants to function effectively; pH buffering; dirt emulsification and prevention of deposition; hydrolysis of grease; and dissolving-dispersing dirt particles.

Sodium Tripolyphosphate, commonly known as STPP, is a chemical compound with a formula Na5P3O10. While it has applications spanning various industries, its uses in the personal care, cosmetics, and soap-making industries are noteworthy due to the diverse functional benefits it offers.

Chemical Properties and Production

STPP is an inorganic compound that appears as a white powder. It's water-soluble and, when dissolved, creates a slightly alkaline solution. It's synthesized through the reaction of disodium phosphate with monosodium phosphate. Due to its unique chemistry, STPP can bind metal ions, making it an effective chelating agent.

Use in Soap Making

In the realm of soap making, STPP serves as a crucial ingredient. The primary reason for its incorporation is its water-softening properties. Hard water, which contains high concentrations of calcium and magnesium ions, can impede soap's effectiveness by reacting with fatty acids in the soap to form an insoluble residue known as "soap scum". STPP, however, binds these hard water minerals, preventing them from interfering with the soap. This results in a more lathering and efficient cleaning process.

Additionally, its pH-buffering capability ensures that the soap maintains its desired consistency and texture, enhancing the overall quality and feel of the finished product.

Role in Personal Care Products

STPP finds its place in numerous personal care products due to its multifaceted benefits:

  • Emulsifier and Stabilizer: STPP can act as an emulsifier, ensuring that the different ingredients, which could be both oil-based and water-based, mix well and stay mixed. This is particularly important in creams and lotions where a smooth texture is desired.
  • Chelating Agent: In shampoos and hair conditioners, STPP serves as a chelating agent. It binds to metals which can be present in water and can affect hair health. By doing so, it ensures that these metals do not interfere with the product’s performance or with the hair's natural shine and bounce.
  • pH Buffer: Maintaining the correct pH is vital in personal care products, especially those that are applied to the skin. An imbalance can cause skin irritation or decrease the effectiveness of the product. STPP helps in buffering the product to the desired pH, ensuring its safety and efficiency.

Contribution to Cosmetic Formulations

STPP's role in cosmetics mirrors many of its functions in personal care. Its emulsifying properties ensure that cosmetic products, whether they're foundations, mascaras, or creams, maintain a consistent texture and do not separate into their individual components. Especially in color cosmetics, the stability of the product is crucial not only for its appearance but also for its performance.

Moreover, the chelating property of STPP ensures that metals, which can sometimes be found in the pigments or other raw materials, do not negatively influence the final product's color or performance.

Safety and Environmental Considerations

When using STPP in personal care, cosmetics, or soap-making, it's essential to consider its environmental impact. There have been concerns regarding its use in other industries due to its potential to promote algal blooms in water bodies. However, in personal care and cosmetics, the concentrations used are typically lower, and the environmental impact might be less significant. Nevertheless, it's always a good practice to source and use STPP responsibly and sustainably.

Furthermore, while STPP is generally considered safe for topical applications in cosmetics and personal care products, it's always essential to ensure that the concentrations used are within recommended limits and that the finished product is tested for skin compatibility.

Sodium Tripolyphosphate Uses

Detergent Industry

It's a key ingredient in various cleaning products. In detergents, Sodium Tripolyphosphate acts as a water softener, enabling the detergents to perform better in hard water by sequestering metal ions.

Ceramic Industry

In the ceramic industry, Sodium Tripolyphosphate is used to improve the properties of ceramics, such as viscosity and fluidity, making it a vital component in ceramic processing.

Water Treatment

It's used in water treatment to control water hardness and to prevent scaling. By binding with metal cations, Sodium Tripolyphosphate can prevent unwanted precipitation and scale formation in water systems.

Pet Care Products

Sodium Tripolyphosphate is also found in pet care products, especially in dental products for pets. It helps in breaking down calcium buildup and tartar, promoting oral hygiene in pets.

Other Industrial Applications

Its properties make it useful in various other industrial applications, such as leather tanning, paper manufacturing, and textile processing, where it functions as a dispersing agent, helping to break down clay and other soil types.

Sodium Tripolyphosphate Benefits

Sodium Tripolyphosphate, often abbreviated as STPP, is a versatile inorganic compound with numerous advantages across various applications, especially in the personal care, cosmetics, and soap-making sectors.

Water Softening

STPP is well-known for its water-softening capabilities. By binding to calcium and magnesium ions present in hard water, STPP prevents these minerals from interfering with soap, ensuring a better lather and cleaning performance.

Emulsifying Properties

In personal care and cosmetic formulations, STPP acts as an effective emulsifier. This ensures that both oil-based and water-based ingredients combine uniformly, maintaining the product's consistency and preventing separation.

Chelating Agent

STPP's ability to bind metal ions makes it an efficient chelating agent. In shampoos, conditioners, and other personal care products, it ensures that metals from water or other sources don't interfere with the product's performance or the health and appearance of hair and skin.

pH Buffering

STPP plays a vital role in maintaining the desired pH level in various products, especially those applied to the skin. Ensuring the correct pH balance is crucial to prevent skin irritations and optimize product efficacy.

Stabilization of Cosmetic Formulations

In cosmetics, STPP ensures that products, be it foundations, mascaras, or creams, remain stable and consistent in texture. This stability is crucial for maintaining the product's appearance and performance, particularly in color cosmetics.

Enhanced Product Shelf Life

Thanks to its stabilizing and emulsifying properties, STPP can extend the shelf life of many products, ensuring they remain effective and safe to use for longer periods.

Improved Texture and Feel

For creams, lotions, and other skin care products, the inclusion of STPP can result in a smoother texture, leading to a better user experience and feel upon application.

Environmental Safety

When used responsibly and in appropriate concentrations, STPP in personal care and cosmetic products can have a minimal environmental impact, especially compared to some of its uses in other industries.


Sodium Tripolyphosphate Light Density: Meaning

Sodium Tripolyphosphate Light Density is a chemical compound with various industrial and commercial applications. Here's what it entails:

1. Chemical Composition

Sodium Tripolyphosphate (STPP) is a white, crystalline powder composed of sodium cations (Na+) and tripolyphosphate anions (PO3)5-. The term "Light Density" indicates a specific grade or form of this compound.

2. Industrial Uses

Sodium Tripolyphosphate is utilized in various industries:

Detergents: It's a common ingredient in laundry detergents and dishwashing soaps, where it aids in water softening, soil suspension, and stain removal.

Water Treatment: STPP is used in water treatment processes to prevent scale formation and maintain water quality.

Industrial Cleaning: It's employed in industrial cleaning solutions due to its ability to sequester metal ions and emulsify oils.

3. Light Density Grade

The term "Light Density" in Sodium Tripolyphosphate likely refers to a specific grade that has a lower density compared to other forms of STPP. This may impact its flow properties and ease of handling in various applications.

4. Applications

Sodium Tripolyphosphate Light Density can be used in formulations where precise dosing and handling are important:

Powdered Detergents: Its flow properties can benefit powdered detergents, ensuring consistent product dispersion.

Industrial Processes: In various industrial applications, the light density form may aid in accurate measurement and incorporation into formulations.

Utilizing Sodium Tripolyphosphate Light Density

Consider the specific requirements of your application when using Sodium Tripolyphosphate Light Density:

1. Formulation Precision

Its light density characteristics can enhance the accuracy of dosing and mixing in formulations.

2. Application Compatibility

Ensure that the properties of Sodium Tripolyphosphate Light Density align with the needs of your specific application.

3. Handling Considerations

Understand how the light density grade affects the handling and flow properties of the compound in your intended use.

Sodium Tripolyphosphate Light Density serves as a valuable ingredient in various industries, contributing to the efficiency and performance of a range of products and processes.

Sodium Tripolyphosphate Light Density (STTP Light Density) vs. Trisodium Phosphate (TSP)

Both Sodium Tripolyphosphate Light Density and Trisodium Phosphate are chemical compounds with distinct characteristics and applications:

1. Chemical Composition

Sodium Tripolyphosphate Light Density (STTP Light Density): STTP Light Density is composed of sodium cations (Na+) and tripolyphosphate anions (PO3)5-. The "Light Density" indicates a specific grade with lower density.

Trisodium Phosphate (TSP): TSP consists of three sodium cations (Na+) and one phosphate anion (PO4)3-. It is commonly used in various applications.

2. Industrial Applications

STTP Light Density: This grade of STTP is likely used in applications where precise dosing and handling are important, such as powdered detergents and industrial processes.

TSP: Trisodium Phosphate has a wide range of applications:

  • Cleaning: TSP is used in cleaning agents due to its ability to remove grease, stains, and grime.
  • Painting: It's used as a deglossing agent and surface preparation for painting.
  • Food Additive: While not covered here, TSP is used in certain industrial and non-food applications.

3. Specific Use Cases

STTP Light Density: It's likely used in formulations that require precise flow properties and accurate mixing, such as powdered detergents.

TSP: TSP's applications vary widely based on its cleaning, degreasing, and preparation properties.

4. Flow Properties

STTP Light Density: The "Light Density" grade suggests improved flow properties, aiding handling and mixing.

TSP: TSP's flow properties may vary based on its specific grade and formulation.

Choosing the Right Compound

When considering STTP Light Density vs. TSP:

1. Application Requirements

Choose the compound that aligns with the requirements of your specific application, whether it's for cleaning, preparation, or formulation.

2. Handling Considerations

Consider the handling characteristics of each compound, such as flow properties and ease of dosing.

Both STTP Light Density and TSP serve distinct purposes in various industries, contributing to the efficiency and performance of different products and processes.

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We Guarantee Your order ships out the same or next business day! This means in the South East you will have your order in 1 to 3 business days, in the North East normally 3 to 4 days and in the West normally 4 to 5 days. For full details on shipping and processing times please see our expected delivery times.

These times are based on business days, not including weekends or holidays.

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Typical Delivery Times to Major US Cities

Major Cities Total Business Days +1 / -1
Alabama (AL) - Montgomery, Birmingham 1
Alaska (AK) - Juneau, Anchorage 7
Arizona (AZ) - Phoenix, Tucson 4
Arkansas (AR) - Little Rock, Fayetteville 2
California (CA) - Sacramento, Los Angeles, San Francisco, San Diego, Sacramento, San Jose 4
Colorado (CO) - Denver, Colorado Springs 3
Connecticut (CT) - Hartford, New Haven 2
Delaware (DE) - Dover, Wilmington, Newark 2
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Georgia (GA) - Atlanta, Savannah, Augusta, Athens 1
Hawaii (HI) - Honolulu, Kailua 7
Idaho (ID) - Boise, Coeur d'Alene 4
Illinois (IL) - Springfield, Chicago, Peoria, Rockford 2
Indiana (IN) - Indianapolis, Fort Wayne 2
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Kentucky (KY) - Frankfort, Louisville, Lexington 2
Louisiana (LA) - Baton Rouge, New Orleans, Lafayette 2
Maine (ME) - Augusta, Portland, Bangor 3
Maryland (MD) - Annapolis, Baltimore 2
Massachusetts (MA) - Boston, Cambridge, Worcester 2
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Mississippi (MS) - Jackson, Biloxi, Hattiesburg 1
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Nevada (NV) - Carson City, Las Vegas, Reno 4
New Hampshire (NH) - Concord, Manchester, Portsmouth 2
New Jersey (NJ) - Trenton, Newark, Jersey City 2
New Mexico (NM) - Santa Fe, Alburquerque 3
New York (NY) - Albany, New York, Rochester, Buffalo, Albany, Syracuse, Niagara Falls, Ithaca 3
North Carolina (NC) - Raleigh, Charlotte 2
North Dakota (ND) - Bismarck, Fargo 3
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Oklahoma (OK) - Oklahoma City, Fairview, 2
Oregon (OR) - Salem, Portland, Eugene 5
Pennsylvania (PA) - Harrisburg, Philadelphia, Pittsburgh 2
Rhode Island (RI) - Providence, Newport 2
South Carolina (SC) - Columbia, Charleston 1
South Dakota (SD) - Pierre, Sioux Falls, Rapid City 3
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Virginia (VA) - Richmond, Virginia Beach 2
Washington (WA) - Olympia, Seattle, Vancouver, Spokane 5
West Virginia (WV) - Charleston, Morgantown 2
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Wyoming (WY) - Cheyenne, Jackson 4

Disclaimer: All product descriptions and specifications provided in this description are intended as a guide only and are subject to change without notice. While we strive for accuracy, discrepancies or errors may be present. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

My well water is not only hard with heavy mineral content, but it’s also alkaline. As a result, soap won’t even dissolve in it.

My new stainless steel dishwasher was developing a hard crust of dried on soap deposits and the dishes not only were coated a white mineral deposit but were coming out of the dishwasher dirtier than before they went in!

The mesh filter in the washer was completely blocked with soap and mineral deposits after every load.

Detergent boosters and vinegar were useless in this situation.

My laundry had similar problems. Clothes came out smelling and dirty. Grease wouldn’t dissolve.

I battled this for more than a year before I finally found out the issue was phosphates had been removed from detergents in consumer products.

This product has been a godsend to me. 1 teaspoon added to my dish washer in every load and my dishes are clean again. The white mineral buildup is gone. With every use my glassware comes back to life and that soap buildup in my dishwasher is gone!

Two teaspoons added to every load of laundry and now my clothes are clean, they smell good, and even greasy stains are removed.

Thank you for making this product available!!!
It definitely works just like the old days when Cascade had the proper amount of phosphate in it. I add about 1/2 teaspoon to the main detergenet compartment along with a Finish tablet. I don't even use rinse aid anymore. It's that good. I know I sound like a commercial, but it's true. I suffered for years after phosphates were removed from dishwasher detergent.
Used this for a couple of weeks. Glasses are looking clearer. Wine glasses don't have the white film. Thanks
An excellent dishwasher soap booster: add 1/2 tsp to both pre and main wash soap dispensers in addition to regular soap. Leaves dishes squeaky clean.
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Safety Data Sheet (Sodium-Tripolyphosphate-Light-Density-STPP.pdf, 113 Kb) [Download]