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TRISODIUM PHOSPHATE=Sodium phosphate=Sodium orthophosphate

CAS: 7601-54-9
European Community (EC) Number: 231-509-8
Molecular Formula: Na3PO4 or Na3O4P
Molecular Weight: 163.941
IUPAC Name: trisodium;phosphate

Solubility: Freely soluble in water. 
Insoluble in ethanol
Melting Point: 1583 °C
Density: 2.54 g/cu cm
pH: Between 11,5 and 12,5 (1 % solution)

Trisodium phosphate (TSP) is the inorganic compound with the chemical formula Na3PO4. 
Trisodium phosphate is a white, granular or crystalline solid, highly soluble in water, producing an alkaline solution. 
TSP is used as a cleaning agent, builder, lubricant, food additive, stain remover, and degreaser.

Trisodium phosphate is produced by neutralization of phosphoric acid using sodium carbonate, which produces disodium hydrogen phosphate. 
The disodium hydrogen phosphate is reacted with sodium hydroxide to form trisodium phosphate and water.

Trisodium phosphate, commonly called TSP, is a packaged, blended cleaning product consisting of 75 to 80 percent trisodium phosphate and 20 to 25 percent sodium carbonate. 
TSP usually comes in the form of an odorless dry powder that must be thoroughly mixed into hot water to form a mostly clear solution, though slightly cloudy. 
Applied with sponges or scrub brushes, TSP is an effective, heavy-duty cleaner for problem areas around the house that may be sooty, greasy, or dirty. 
Though bans on phosphates are in effect in many communities, TSP, where legal, is often favored by contractors and painters to ensure that the surface will be clean, dust-free, and able to take the paint. 
Phosphate-free substitutes to TSP are available.

An inorganic chemical compound (Na₃PO₄), TSP is a white granular or crystalline substance that can be mixed with water to create an alkaline solution. 
Once diluted, TSP is a highly effective cleanser, degreaser, and stain remover.

Trisodium phosphate’s also used to prepare painted surfaces for refinishing or repainting, due to its ability to de-gloss paint as well as free the surface of flaking, peeling areas. 
Trisodium phosphate’s sold in powder form, typically as 75 to 80 percent trisodium phosphate and 20 to 25 percent sodium carbonate. 
TSP should be stored in a secure, dry place (humid conditions can cause clumping).

TSP or Trisodium Phosphate is a non-sudsing powdered cleaner formulated for heavy duty cleaning prior to painting. 
TSP is excellent for cleaning and removing heavy deposits of grease, grime, smoke, soot stains and chalked paint from walls, woodwork and floors. 
TSP when mixed with bleach can be used to remove mold and mildew stains.

Trisodium phosphate has a variety of applications but is primarily used as a cleaning agent, food additive, stain remover and degreaser.

Trisodium Phosphate (Na₃PO₄) is a white crystal that forms an alkaline solution when mixed with water. 
TSP is non-toxic, cheap, and has a pH of 12-14 in solution. This solution is extremely basic and is used to clean, sanitize, and remove stains from various substrates by saponification. 
TSP can react with aluminum, causing erosion and hydrogen gas formation. Phosphate is also harmful to the water ecosystems, and thus may be regulated in various areas. 
TSP can be bought in anhydrous form, but is often produced in partially hydrated form (up to Na₃PO₄•12H₂O).

Mild alkalies such as TSP are used when there isn’t a heavy load of microorganisms. 
Chlorinated TSP can be bought and used in all winery equipment (except for barrels) for sterilization. 
TSP reduces cell viability and membrane integrity, and has a superior antimicrobial effect compared to other phosphate compounds. 
Trisodium phosphate is important to note that TSP is most effective against aerobic microbes; 1 cup per 5 gallons is the recommended dilution, and washing with citric acid is recommended to neutralize the residue. 
The recommended procedure is rinse with water, rinse with TSP solution, rinse with water, rinse with citric acid, and then rinse with water again.

TSP is used for washing surfaces prior to painting, especially exterior surfaces. 
Liquid bleach is often added to TSP if there is mildew on the surfaces. 
The TSP and bleach act in concert to both kill the mildew and remove its characteristic stains. 
Trisodium phosphate may be used on inside surfaces also, but try to mask all surfaces except the one you want to clean. 
Trisodium phosphate can damage many metal and painted surfaces, and can stain woods. 
Trisodium phosphate is not recommended for use on glass, either, since it will leave a filmy residue.

The item of commerce is often partially hydrated and may range from anhydrous Na3PO4 to the dodecahydrate Na3PO4 · 12 H2O. 
Most often found in white powder form, it can also be called trisodium orthophosphate or simply sodium phosphate.

TSP and TSP-bleach solutions may be applied with a sponge or brush, or can be sprayed on. 
Generally, you will have to apply some elbow-grease if the mildew or other staining is severe. 
If you are washing the exterior of a house, it may be worthwhile for you to look into the rental of commercial powerwashing equipment. 
You may be able to do all necessary cleaning from the ground level, sparing you the risk of extra ladderwork.

Trisodium phosphate (TSP) is an alkaline detergent that has been approved by USDA for use as a spray-application or carcass-dip at concentrations of 8–12%. 
The treatment temperature should be maintained at 4555 0 F to ensure efficacy. 
As an antimicrobial, TSP removes attached bacteria from carcass surfaces by means of its surfactant properties and high alkalinity (pH about 12.0). 
In addition, TSP kills bacteria by disrupting the cell membrane and causing leakage of cellular material.
Found that Campylobacter levels were significantly reduced when poultry carcasses were dipped in a 10% TSP solution after chilling.

TSP (Trisodium Phosphate) is a heavy duty cleaner that removes grease oil, sooty dirt, and prepares painted surfaces for repainting or staining. 
Effective on decks and siding also. TSP removes dirt and grime.

This product is a highly effective cleaner that, when mixed with water or other cleaning agents, will clean nearly any wood surface including mildewed, grayed or sap-stained areas.

Trisodium phosphate is made by neutralizing phosphoric acid by using sodium hydroxide. 
Sometimes, sodium carbonate is also added, but carbonate only produces disodium phosphate. 
The chemical formula of TSP is NA3PO4, and the solid white substance has a granular or crystalline texture. 
Trisodium phosphate is mostly found in powder form. 
TSP is highly water soluble, and it produces an alkaline solution. 
Trisodium phosphate is used in many applications, including but not limited to, cleaning, building, food additives, and removing stains. 

Although the primary use for TSP is for cleaning, there is a wide range of other applications of this chemical. 
Trisodium phosphates alkaline properties make it perfect for removing grease and oil from various surfaces. 
Trisodium phosphate is exceptionally potent, which allows it to also clean dirt, fingerprints, walls, bleach clothes, and a lot more. 
You can easily mix TSP with regular household bleach without worrying about a reaction.

Trisodium phosphate is used to prolong shelf-life, and in some cases, to improve the texture of food or enhance the flavor. 
Trisodium phosphate's in a lot of processed foods, baked goods and cheeses,

Trisodium phosphate (TSP), available at most hardware stores in white powder form, is a cleaning agent, stain remover and degreaser, commonly used to prepare surfaces for painting. 
Trisodium phosphate can also be called trisodium orthophosphate and has the chemical formula Na3PO4; however, it is generally found in hydrated forms. 
Trisodium phosphate is a highly water-soluble ionic salt. 
Solutions of Trisodium phosphate dissolved in water have an alkaline pH.

Trisodium phosphate can also be found as a food additive; it is used as an acidity regulator (buffering agent), emulsifier, thickening agent, nutrition enlargement agent and sequestrant (metal-chelating agent). 
In these uses, all sodium phosphates may be collectively referred to as sodium phosphate, or by E number E339. 
The same is true when sold as an enema, working as a laxative to treat constipation. Sodium phosphate enemas are sold over-the-counter in the United States. 
However, Trisodium phosphate should not be confused with the related compounds sodium dihydrogen phosphate, also known as monosodium phosphate or MSP, and disodium phosphate.

Similar chemicals were once common in laundry and dishwashing detergents, but the phosphate, being a fertilizer, would cause algal blooms in the bodies of water that the drains led to. 
In the early 1970s the use of phosphate-containing products was limited. 
Now products sold as TSP Substitute, containing 80–90% sodium carbonate, are promoted as a direct substitute.

Cleaning products labeled as TSP may contain other ingredients as well, and may in fact be less than half TSP.
So even "regular" TSP found at the hardware store may be half TSP and half "TSP substitute". 
Some large home improvement centers that sell paint no longer offer TSP.

Although it is the active ingredient in at least one toilet bowl cleaning tablet, TSP is generally not good for cleaning bathrooms, because it can corrode metal.

TSP is commonly used after cleaning with mineral spirits in order to then clean up all the mineral spirits. 
TSP may be used with household chlorine bleach in the same solution, and this is particularly good for removing mildew from wood. 
The TSP alone can cause dark stains on redwood, and bleach prevents it.

Trisodium phosphate is also used in various forms as a boiler treatment chemical for calcium precipitation, as well as regulating the caustic effects of disodium phosphate in coordinated phosphate chemistry.

Trisodium phosphate is also used to clean swimming pool polyester filter elements.

Trisodium phosphate (TSP) is an inorganic, water soluble compound which finds uses in both household and industrial cleaners, degreasers, water conditioning, and as a builder and filler for soaps.

Trisodium Phosphate (TSP), Na3PO4.12H2O, is a white or colorless crystal that is efflorescent in air. 
Trisodium phosphate is easily soluble in water but is insoluble in organic solutions. 
Food grade Trisodium Phosphate (TSP) is used as an acidity regulator, an emulsifier, a humectant, a raising agent, a sequestrant, a stabilizer, and a thickening agent.

Trisodium Phosphate (TSP) is a white, granular or crystalline solid, highly soluble in water producing an alkaline solution. 
TSPs are used as cleaning agent, stain remover and degreaser.

Trisodium phosphate, more commonly referred to as TSP, is often used as a household cleaner. 
But TSP has many uses, including eliminating potential diseases in vegetable plants and as a pesticide for various crops. 
Because of its wide use, trisodium phosphate is easily available, inexpensive and very effective for disinfecting tools and killing harmful fungus and bacteria throughout your garden and home.

Trisodium phosphate, or TSP, is a chemical compound that will clean, disinfect, degrease and remove stains. 
Trisodium phosphate can be purchased in powdery, granular form and easily dissolves in water. Often found as an ingredient in soaps and detergents.

Using a heated water and trisodium phosphate solution to disinfect seeds is particularly successful for tomato and pepper seeds that may have been exposed to tobacco mosaic virus. 
Placing the vegetable seeds in a cotton bag and soaking them for 40 minutes in a solution of 1 lb. trisodium phosphate with 1 gallon of water heated to 122 degrees Fahrenheit will decrease the transmission of the virus. 
After the 40-minute soak, rinse the seeds, air dry them and treat them with a protective fungicide before planting.

One of the best applications for trisodium phosphate in your garden is to use it to clean and sterilize tools, especially if you have been using the tools to remove part or all of a diseased plant. 
After thoroughly washing your tools -- including pruners, shovels and trowels -- with warm soapy water, soak the tools for 30 minutes in a solution of TSP and water. 
The mixture needs to contain a concentration of trisodium phosphate that is recommended for washing clothes or dishes with a detergent. 
Do not rinse the trisodium phosphate and water mixture off your garden tools after soaking, but allow them to air dry.

This white crystalline inorganic compound is highly soluble in water and produces an alkaline solution. 
Trisodium phosphates are typically found in various commercial and industrial cleaning agents, lubricant, food additives, laundry and carpeting stain removers, and automotive, commercial and industrial degreasers. 
The primary method of synthesis of trisodium phosphates is via the neutralization of phosphoric acid with sodium hydroxides, most commonly sodium carbonate. Carbonate alone only produces disodium phosphate. 
Trisodium phosphates utility as a cleaning agent derives from its ability to saponify grease and oils, particularly when combined with surfactants. 
Trisodium phosphate was the basis for innumerable cleaning products throughout the 20th century, but its popularity waned in the 1960s once it was discovered that it was a prime cause of the eutrophication of lakes and rivers once it became part of local water tables. 
Today, TSP is typically used for cleaning surfaces that have been exposed to mineral spirits as a solvent in order to remove the hydrocarbon residue, and can be safely combined with chlorine bleach without generating a hazardous reaction.

Trisodium phosphate uses traditionally revolved around industrial and residential cleaning. 
As an ingredient in detergents, degreasers, and mildew removers, this powerful chemical features alkalinizing properties that made it popular in laundry detergents and dishwashing liquids since alkaline cuts through grease and oil. 
Trisodium phosphate was also used as a paint prep agent on interior and exterior walls and mixed with bleach to create a strong mold cleaner. 
However, Trisodium phosphate is not recommended for wood cleaning because of staining properties, nor is it used on metal or glass due to damage and filmy residue, respectively.

In addition to its many cleaning applications, trisodium phosphate is surprisingly utilized as a food additive. 
Trisodium phosphate is called E339 when used for food purposes. 
Main utilizations include its functions as a thickening agent, acidity regulator, emulsifier, and nutritional enlargement product. 
Most common foods containing the additive include meat, cheese, and baked goods. 
The chemical holds moisture in meat, whether stored or cooked, and helps cheese maintain its shape and melting abilities. 
Trisodium phosphate is used as a leavening agent in bread, cake, muffins, and similar products.

Trisodium phosphate in cereal is yet another common food application. 
The chemical makes minor changes to improve dry, extruded cereal color while also promoting the product’s flow through extruder equipment. 
Further cereal uses include phosphorus fortification.

TSP is one of the best and most reliable cleaning agents to date, even after extreme dilution. 
Using TSP is a good choice for cleaning stains and residues that are nearly impossible to remove. 
Here are the main benefits of using TSP:

-Trisodium phosphate is an extremely strong and effective cleaner.
-Trisodium phosphate gets rid of stubborn stains, mildew, dirt, grease, etc.
-Trisodium phosphate is more effective for bleaching white clothes than all other bleaching agents.
-If you spray Trisodium phosphate on the sides of your home, it’ll provide protection from fungus.
-Trisodium phosphate can be easily applied using sponges, brushes, mops, etc.
-You can use a sprayer to apply TSP in hard to reach areas or for exteriors.
-Trisodium phosphate is suitable for different materials such as brick, stone, cement, or wood.
-TSP leaves surfaces extremely clean and neat.
-TSP solution is very easy to prepare.

Where is TSP the Most Effective?

-Power through accumulated layers of dirt, grease, grime, soot, and stains on exteriors—notably masonry (brick, stone, cement, and concrete), wood (decks and siding), and roofing.

-When prepping for a paint job, TSP can clean and de-gloss painted surfaces and remove peeling, flaking old paint.

-Inside the house, TSP works well on the stubborn sort of grease-meets-dirt gunk typically found after pulling an old stove or fridge away from the wall.

-Though it shouldn’t be used to clean grout, TSP can be used to remove it; TSP is an active ingredient in grout removal products.

-TSP can safely be mixed with bleach to remove mold and mildew (see below for measurement guidelines).

It wasn’t so long ago that trisodium phosphate (TSP) was a go-to choice for tough cleaning jobs, especially on exteriors. 
Diluted in water and applied often with a stiff scrub brush, it can remove stubborn grease stains and mold and mildew growth. 
In recent years, however, the popularity of TSP has waned. 
There are no complaints about its performance—TSP was and remains a highly effective cleaner.

Trisodium phosphate was at one time extensively used in formulations for a variety of consumer-grade soaps and detergents, and the most common use for trisodium phosphate has been in cleaning agents. 
The pH of a 1% solution is 12 (i.e., very basic), and the solution is sufficiently alkaline to saponify grease and oils. 
In combination with surfactants, TSP is an excellent agent for cleaning everything from laundry to concrete driveways. 
This versatility and low manufacturing price made TSP the basis for a plethora of cleaning products sold in the mid-20th century.

TSP is still sold and used as a cleaning agent, but since the late 1960s, its use has diminished in the United States and many other parts of the world because, like many phosphate-based cleaners, it is known to cause extensive eutrophication of lakes and rivers once it enters a water system.

TSP is commonly used after cleaning a surface with mineral spirits to remove hydrocarbon residues and may be used with household chlorine bleach in the same solution without hazardous reactions.
This mixture is particularly effective for removing mildew, but is less effective at removing mold.

Although it is still the active ingredient in some toilet bowl-cleaning tablets, TSP is generally not recommended for cleaning bathrooms because it can stain metal fixtures and can damage grout.

With the formula, Na3PO4.1/4NaOCl.11H2ONa3PO4.1/4NaOCl.11H2O the material called chlorinated trisodium phosphate is used as a disinfectant and bleach, like sodium hypochlorite. 
It is prepared using NaOCl in place of some of the base to neutralize phosphoric acid.

In the U.S., trisodium phosphate is an approved flux for use in hard soldering joints in medical-grade copper plumbing. 
The flux is applied as a concentrated water solution and dissolves copper oxides at the temperature used in copper brazing.
Residues are water-soluble and can be rinsed out before plumbing is put into service.

TSP is used as an ingredient in fluxes designed to deoxygenate nonferrous metals for casting. 
It can be used in ceramic production to lower the flow point of glazes.

Painting enhancement
TSP is still in common use for the cleaning, degreasing, and deglossing of walls prior to painting. 
TSP breaks the gloss of oil-based paints and opens the pores of latex-based paint, providing a surface better suited for the adhesion of the subsequent layer.

Food additive
Sodium phosphates including monosodium phosphate, disodium phosphate, and trisodium phosphate are approved as food additives in the EU. 
They are commonly used as acidity regulators and have the collective E number E339.
The United States Food and Drug Administration lists sodium phosphates as generally recognized as safe.

Exercise performance enhancement
Trisodium phosphate has gained a following as a nutritional supplement that can improve certain parameters of exercise performance.
The basis of this belief is the fact that phosphate is required for the energy-producing Krebs cycle central to aerobic metabolism. 
Phosphates are available from a number of other sources that are much milder than TSP. 
While TSP is not toxic per se, it is severely irritating to gastric mucosa unless used as part of a buffered solution.

In the Western world, phosphate usage has declined owing to ecological problems with the damage to lakes and rivers through eutrophication.

See also: Cleaning products and the environment
By the end of the 20th century, many products that formerly contained TSP were manufactured with TSP substitutes, which consist mainly of sodium carbonate along with various admixtures of nonionic surfactants and a limited percentage of sodium phosphates.

Products sold as TSP substitutes, containing soda ash and zeolites, are promoted as direct substitutes. 
However, sodium carbonate is not as strongly basic as trisodium phosphate, making it less effective in demanding applications.
Zeolites, which are clay based, are added to laundry detergents as water softening agents and are essentially non-polluting; however, zeolites do not dissolve and can deposit a fine, powdery residue in the wash tub.
Cleaning products labeled as TSP may contain other ingredients, with perhaps less than 50% trisodium phosphate.

Removing Mildew
You can effectively remove mildew from walls with TSP. 
Trisodium phosphate will also remove any stains due to the mildew. 
Just make sure not to use the chemical on any metal, wood, or glass that’s near the mildew. 
Trisodium phosphate may cause damage to these materials. 
After cleaning the mildew and mildew stains, you’ll have to rinse the surface with water and leave it to dry. 
Although TSP is handy in removing mildew, it isn’t entirely suitable for removing mold.

Chlorinated TSP
Chlorinated TSP is made from NAOCl by neutralizing the phosphoric acid. 
Chlorinated trisodium phosphate is commonly found in cleaning powders and is an excellent cleaning chemical as well. 
It is used as a bleach and disinfectant similar to sodium hypochlorite. 
Chlorinated trisodium phosphate is suitable for cleaning steel surfaces or products and a few types of plastics as well.

Cleaning Walls
TSP cleaner is commonly used to clean walls and other surfaces before painting. 
Regular vacuum your walls after cleaning walls with TSP, otherwise you can’t get desire cleaning result. 
Trisodium phosphate should be mixed with water and used only on these surfaces, outside ones being best. 
Rinse everything thoroughly after using the TSP cleaner and then give ample drying time before painting. 
Trisodium phosphate can be a replacement for sandpaper as well since TSP cleaner will remove paint.

Cleaning Masonry
Masonry can also be cleaned using TSP cleaners. 
While cleaning masonry, it is crucial to make sure you aren’t dealing with significant mortar staining because these types of stains require an even stronger cleaning agent. 
It is also necessary to rule out efflorescence, which consists of salt deposits from the water.

Flux consists of a bunch of materials that are used to cover welds and protect them from atmospheric gases. 
TSP has been approved in the US for applications in hard soldering joints done for medical-grade copper plumbing. 
TSP is one of the ingredients used in fluxes that are created for deoxygenating nonferrous casting metals.

Cleaning Roofs
TSP can be used to clean roofs of all types. 
You’ll need to dilute the TSP first just like you would for any other application. 
Usually, TSP is diluted by adding a half cup of it to almost two gallons of warm water. When cleaning roofs with TSP, it is essential to be very careful of the surroundings. 
If TSP comes into contact with plants, it can damage or kill them. 
Phosphates are very strong and harmful to foliage, so make sure you cover nearby plants with water before working with TSP. 
Water on the foliage can reduce any damage if TSP does happen to reach it. 
If there are moss and dirt on your roof, chances are you will need to scrub hard to remove them. 
The result, however, will leave your roof extremely neat and clean.

Removing Grout
Trisodium phosphate is also used for eliminating dried grout. 
Although it can’t be used for cleaning grout, it is effective at removing old parts of it.  
Grouts hold tiles together; this is why cleaning tile grout requires a lot of effort.
While taking out old tiles, you may see some old grout that’s extremely difficult to remove, which is where TSP comes in. 
All you must do is leave some TSP cleaner to sit on the grout for a few minutes, and then remove it. 
The dried grout will come out much easier than it would’ve before.

Enhancing Wall Paint
TSP can be used to de-grease, de-gloss, and completely clean walls before painting them. 
TSP is effective in removing and breaking apart gloss from oil-based paints and removing latex-based paint. 
Cleaning the walls with TSP is a useful step before painting because it’ll provide you with a surface that’s much better suited for applying paint layers.

Food Additive
In the EU, various sodium phosphates such as monosodium phosphate and trisodium phosphate are used as food additives. 
Their most common use is to act as acidity regulators. 
The US FDA also approves sodium phosphates safe for adding to foods. 

Enhancing Exercise
Trisodium phosphate has become popular as a nutritional supplement that allows people to exercise better. 
This assumption is based on the fact that phosphate is useful for the Krebs cycle, which produced energy and is an integral part of the body’s aerobic metabolism.




Sodium phosphate

Sodium orthophosphate

Phosphoric acid, trisodium salt


Trisodium orthophosphate

Trisodium phosphate anhydrous

Tribasic sodium phosphate

Sodium phosphate, anhydrous

Phosphoric acid trisodium salt


Tertiary sodium phosphate


Sodium phosphate (Na3PO4)


Sodium orthophosphate, tribasic


sodium monophosphate

Tri-Sodium Phosphate

sodium;phosphoric acid


Phosphoric acid, sodium salt (1:3)


Sodium orthohosphate



Nutrifos STP

Caswell No. 898

Sodium phosphate (VAN)

Emulsiphos 440/660

Trinatriumphosphat [German]

Sodium phosphate, tribasic; Sodium tertiary phosphate; Tribasic sodium orthophosphate; Tribasic sodium phosphate; Trisodium orthophosphate

Sodium phosphate, tribasic, pure, anhydrous

Sodium orthophosphate, tertiary

CCRIS 7086

HSDB 583

EINECS 231-509-8

EPA Pesticide Chemical Code 076406

NSC 215202

Trisodium phosphate solution

sodium phophate

EINECS 265-604-0

EINECS 268-603-3

Sodium phosphate, 96%

Trisodium Ortho Phosphate


Phosphoric acid, C14-18 and C16-18-unsatd. alkyl esters, sodium salts


(C14-C18) and (C16-C18)Unsaturated alkyl alcohol, phosphoric acid sodium salt

EC 231-509-8


Monosodium phosphate disodium phosphate double salt


Sodium phosphate, tribasic (NF)

Phosphoric acid, sodiumsalt (1:?)

Sodium phosphate, AR, >=95.5%

Trisodium trihydrogen bis(phosphate)



Sodium phosphate tribasic, p.a., 97%





Sodium phosphate, SAJ first grade, >=97.0%





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