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Sodium calcium polyphosphate is the name for a manufactured fiber in which the fiber-forming substance is glass.
Sodium calcium polyphosphate are a class of materials made from silicon dioxide with oxi des of various metals and other elements, which solidify from the molten state without crystallization.
Sodium calcium polyphosphate acts as a chelating and sequestering agent, capable of binding metal cations such as calcium, magnesium, and iron, which makes it highly useful in controlling water hardness, preventing scale formation, and stabilizing emulsions in various industrial and food applications.
CAS Number: 65997-17-3
Molecular Formula: CaNaO4P
Molecular Weight: 158.039131
EINECS Number: 266-046-0
Synonyms: LIME GLASS, GLASS BEADS, ACID WASHED, GLASS POWDER, GLASS WOOL, GLASS WOOL, SILANIZED, GLASS SPHERES, GLASS, GLASS BALLS
Sodium calcium polyphosphate is the name for a manufacturedfiber in which the fiber-forming substance is glass.
Sodium calcium polyphosphate a class of materials made from silicon dioxide with oxides of various metals and other elements that solidify fromthe molten state without crystallization.
Typically, glassfilaments, 3 μm in diameter or glass “wool” with diameters down to 0.05 μm and length>1 μm.
A fiber isconsidered to be a particle with a length-to-diameter ratioof 3:1 or greater.
The volume of small diameter fiber production has not been determined.
Fibers with diameters lessthan 1 μm are estimated to comprise less than 1% of thefibrous glass market.
Sodium calcium polyphosphate is an inorganic, water-soluble salt composed of sodium, calcium, and polymeric phosphate anions, which form a network of linked phosphate units, often referred to as polyphosphates.
Its general chemical structure consists of chains or networks of phosphate groups (PO4) connected by oxygen bridges, with sodium and calcium ions balancing the negative charges of the polyphosphate chains.
The relative proportions of sodium, calcium, and phosphate in the compound can vary depending on the specific grade and application, which in turn affects its solubility, buffering capacity, and sequestration properties.
Typically, glass filaments >3 μm in diameter or glass “wool” with diameters down to 0.05 μm & length >1 μm.
A fiber is considered to be a particle with a length-to-diameter ratio of 3:1 or greater.
The volume of small diameter fiber pro duction has not been determined.
Fibers with diameters less than 1 μm are estimated to comprise less than 1% of the fibrous glass market.
Its polymeric phosphate chains also give it thermal and chemical stability, allowing it to function effectively in both dry and aqueous systems, even under high temperatures or varying pH conditions.
In addition to its industrial properties, Sodium calcium polyphosphate is also used as a food additive, where it serves as a buffering agent, anti-caking agent, or emulsifier.
In these applications, it can improve the texture, stability, and shelf life of processed foods such as powdered drink mixes, processed cheeses, and meat products by binding excess ions, preventing clumping, and maintaining moisture content.
Due to its ability to interact with metal ions and alter ionic equilibria, Sodium calcium polyphosphate is also utilized in water treatment, detergents, and ceramics, where it can prevent scale deposition, enhance dispersion, or modify the crystalline structure of ceramic materials.
Its polymeric nature and chemical reactivity make it a versatile compound across multiple industries, offering functional benefits in both food processing and industrial applications.
Sodium calcium polyphosphate is a multifunctional compound with extensive utility across food, industrial, and chemical sectors, valued for its metal ion chelation, buffering capacity, dispersing ability, and chemical stability, making it indispensable in applications ranging from food processing and beverage manufacturing to water treatment, detergents, ceramics, and specialty chemical formulations.
Melting point: 680 °C
Boiling point: 1000 °C
Density: 1.1 g/mL at 25 °C(lit.)
bulk density: 20-160kg/m3
storage temp.: 15-25°C
form: Fiber (particle with a lengthto-diameter aspect ratio of 3 to 1 or greater).
PH: 9-11 (100g/l, H2O, 20℃)(slurry)
Appearance: White to off-white Solid
Stability: Stable.
InChI: InChI=1S/Ca.Na.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q+2;+1;/p-3
InChIKey: QXJJQWWVWRCVQT-UHFFFAOYSA-K
SMILES: [Ca+2].[Na+].P([O-])([O-])([O-])=O
Sodium calcium polyphosphate name for a manufactured fiber in which the fiber-forming substance is glass (Federal Trade Commission).
Sodium calcium polyphosphate is a highly versatile polyphosphate salt widely employed across both industrial and food applications due to its unique ability to chelate metal ions and modify ionic equilibria.
Sodium calcium polyphosphate consists of linear or branched chains of phosphate groups, where each phosphate unit is linked via oxygen atoms, forming polymeric structures that are stabilized by sodium and calcium cations, which balance the negative charges of the phosphate backbone.
This polymeric nature allows it to act as a sequestrant, buffering agent, and stabilizer, making it highly effective at controlling water hardness, preventing precipitation of calcium and magnesium salts, and maintaining the chemical stability of solutions in both industrial processes and food formulations.
In food technology, Sodium calcium polyphosphate is commonly used as an anti-caking agent, emulsifier, and buffering agent, improving the texture, flowability, and shelf life of powdered or processed foods.
For example, in powdered drink mixes, it helps prevent clumping caused by moisture, while in processed cheeses and meat products, it stabilizes protein and fat emulsions, maintains moisture content, and ensures uniformity in texture and appearance.
Its ability to bind free calcium and magnesium ions also helps regulate ionic strength, which can influence flavor, mouthfeel, and product stability in complex formulations.
In industrial applications, the compound serves as a scale inhibitor and dispersing agent, where its chelating properties prevent the deposition of calcium and magnesium salts in boilers, cooling towers, and piping systems, thereby improving equipment efficiency and longevity.
In the ceramics and materials industries, Sodium calcium polyphosphate can act as a crystal growth modifier, influencing the formation and size of crystalline phases in ceramic glazes or inorganic composites, which enhances surface properties and mechanical strength.
Sodium calcium polyphosphate any noncrystalline solid; i.e. asolid in which the atoms are randomand have no long-range ordered pattern.Glasses are often regarded as supercooledliquids. Characteristicallythey have no definite melting point,but soften over a range of temperatures.
The common glass used in windows,bottles, etc., is soda glass,which is made by heating a mixtureof lime (calcium oxide), soda (sodiumcarbonate), and sand (silicon(IV)oxide).
Sodium calcium polyphosphate is a form of calcium silicate.
Borosilicate glasses (e.g. Pyrex) aremade by incorporating some boronoxide, so that silicon atoms are replacedby boron atoms.
They aretougher than soda glass and more resistantto temperature changes,hence their use in cooking utensilsand laboratory apparatus.
Glasses forspecial purposes (e.g. optical glass)have other elements added (e.g. barium,lead).
Silica is a naturally occurring material in minerals, flint and in some plants in crystalline phase.
Sodium calcium polyphosphate used in industries is in synthetic form.
Surface area, pore volume, pore size and particle size are independently controllable to some extent.
The crystalline silica may be classified based on atmospheric pressure as.
In industrial applications, the compound serves as a scale inhibitor and dispersing agent, where its chelating properties prevent the deposition of calcium and magnesium salts in boilers, cooling towers, and piping systems, thereby improving equipment efficiency and longevity.
In the ceramics and materials industries, Sodium calcium polyphosphate can act as a crystal growth modifier, influencing the formation and size of crystalline phases in ceramic glazes or inorganic composites, which enhances surface properties and mechanical strength.
Because of its polymeric phosphate chains and metal-binding capabilities, Sodium calcium polyphosphate is also employed in detergent formulations, where it helps soften water, enhance cleaning efficiency, and prevent redeposition of minerals on washed fabrics or surfaces.
Additionally, in certain pharmaceutical and nutritional applications, it may be used as a mineral supplement or stabilizing agent, where its controlled release of calcium and phosphate ions contributes to maintaining dietary mineral balance or improving the stability of drug formulations.
Uses Of Sodium calcium polyphosphate:
Thermal, acoustic, and electrical insulation (coarse fibers in bats or sheets); decorative and utility fabrics such as drapes, curtains, table linen, carpet backing, tenting, etc.; tire cord as belt between tread and carcass; filter medium; reinforced plastics; light transmission for communication signals; reinforcement of cement products for construction use.
Sodium calcium polyphosphate is used for thermal and acoustical insulation in construction and ship building; for air filtration in furnaces and airconditioning systems.
Glass, one of the oldest and most extensivelyused materials, is made from the most abundantof Earth’s natural resources — silica sand.
Forcenturies considered as a decorative, fragilematerial suitable for only glazing and artobjects, today glass is produced in thousandsof compositions and grades for a wide range ofconsumer and industrial applications.
Sodium calcium polyphosphate spheres are low density filler for coatings and plastics.
Sodium calcium polyphosphate was used in synthesis of silicalite.
Sodium calcium polyphosphate was also used to assist the catalytic growth of oxide and nitride nanowires.
Fine flexible glass fibers made from glass are used for heat and sound insulation, fireproof textiles,acid-resistant fabrics, retainer mats for storage batteries, panel board, filters, and electrical insulating tape, cloth, and rope.
Molten glass strings out easily into threadlike strands, and this spun glass was early used for ornamentalpurposes but the first long fibers of fairly uniformdiameter were made in England by spinningordinary molten glass on revolving drums.
The standard glass fiber used in glass-reinforced plastics is a borosilicate type known asE-glass.
Sodium calcium polyphosphatecloth of plain weave of either continuous fiber or staple fiber is much used forlaminated plastics.
The primary engineering benefits of glass fibersare their inorganic nature, which makesthem highly inert; high strength-to-weightratio; nonflammability; and resistance toheat, fungi, and rotting.
Sodium calcium polyphosphate is primarily utilized as a food additive, where its chemical properties allow it to serve as an anti-caking agent, buffering agent, and emulsifier, enhancing the texture, stability, and shelf life of processed foods.
In powdered or granulated products such as instant drink mixes, powdered soups, or seasoning blends, it prevents clumping caused by moisture absorption, ensuring that the powder flows freely and dissolves uniformly when mixed with liquids.
In processed cheese and meat products, it functions as an emulsion stabilizer, helping to maintain a consistent mixture of fat and protein, improving texture, mouthfeel, and overall product quality while also reducing moisture loss during storage and cooking.
In beverage and nutritional formulations, Sodium calcium polyphosphate acts as a buffering agent, controlling the pH of the solution and preventing undesirable chemical reactions that could compromise taste, color, or nutrient stability.
By binding free calcium and magnesium ions, it prevents precipitation of salts, ensuring that beverages and fortified drinks remain clear and homogeneous throughout their shelf life.
In industrial applications, this compound is highly valued as a water softening agent, scale inhibitor, and dispersant.
Its ability to chelate calcium and magnesium ions prevents the formation of scale in boilers, cooling towers, pipelines, and other water-handling equipment, which helps maintain operational efficiency, reduce maintenance costs, and extend the lifespan of machinery.
Additionally, it is used in detergents and cleaning products, where it improves cleaning performance by softening water, enhancing the solubility of detergents, and preventing the redeposition of minerals on fabrics, glassware, or industrial surfaces.
In the ceramics and materials industries, Sodium calcium polyphosphate can act as a crystal growth modifier, influencing the size, morphology, and distribution of crystals in glazes, coatings, or composite materials.
This property allows manufacturers to produce materials with enhanced mechanical strength, improved surface finish, and controlled porosity, which is valuable in both functional and decorative applications.
In certain pharmaceutical and nutritional applications, it is used as a source of calcium and phosphate ions, contributing to mineral supplementation and acting as a stabilizing agent in formulations where controlled release or chemical stability of ions is critical.
Its polymeric phosphate chains ensure that the release of ions is gradual and predictable, making it suitable for applications requiring consistent dosing and long-term stability.
Sodium calcium polyphosphate are extensive and multifaceted, encompassing food processing, beverage formulation, industrial water treatment, detergent manufacturing, ceramics and materials engineering, and pharmaceutical or nutritional supplementation, leveraging its chelating ability, buffering capacity, dispersing properties, and chemical stability to improve product quality, operational efficiency, and functional performance across a wide range of applications.
Safety Profile Of Sodium calcium polyphosphate:
Sodium calcium polyphosphate is generally considered to have low acute toxicity, but like many powdered or particulate chemicals, it can pose health hazards if handled improperly.
Inhalation of dust or fine particles can cause respiratory irritation, including coughing, sneezing, or a sore throat, particularly if exposure occurs over prolonged periods in poorly ventilated areas.
Direct contact with the eyes or skin may result in mild irritation, redness, or itching, although serious burns or long-term damage are uncommon.
Prolonged or repeated exposure to dust may exacerbate respiratory conditions such as asthma or bronchitis in sensitive individuals.
Ingestion of large quantities of Sodium calcium polyphosphate may lead to gastrointestinal disturbances, including nausea, vomiting, or diarrhea, although the compound is generally recognized as safe at the levels typically used in food processing.
Its high solubility and ability to chelate metal ions can, in excessive amounts, alter the balance of calcium or phosphate in the body, which may be of concern in individuals with kidney disease or mineral metabolism disorders.
From a chemical handling perspective, Sodium calcium polyphosphate is stable under normal conditions and does not pose significant fire or explosion risks.
However, as with all powdered materials, dust accumulation can create a localized dust hazard, and it should be stored away from strong acids, which could hydrolyze the polyphosphate chains, or strong oxidizers, which may react under specific conditions.
