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Encyclopedia > Trisodium phosphate
Trisodium phosphate
Trisodium phosphate dodecahydrate
Systematic name Trisodium phosphate
Other names Sodium phosphate tribasic
Molecular formula Na3PO4·12H2O
Molar mass 380.1243 g/mol
Appearance white crystalline solid
CAS number [10101-89-0] (12H2O)
[7601-54-9] (anhydr.)
EINECS number 231-509-8
Density and phase 1.620 g/cm³, solid
Solubility in water 1.5 g/100 ml (0 °C)
Melting point 73.5 °C decomp.
Basicity (pKb) 2.23
Crystal structure Trigonal
Thermodynamic data
Standard enthalpy
of formation
 ? kJ/mol
Standard molar entropy
 ? J.K−1.mol−1
Safety data
EU classification not listed
Flash point non flammable
RTECS number TC9575000
Supplementary data page
Structure and
n, εr, etc.
Phase behaviour
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
Related compounds
Other anions Sodium arsenate
Sodium antimonate
Sodium bismuthate
Other cations Trilithium phosphate
Tripotassium phosphate
Related compounds Sodium dihydrogen phosphate
Disodium hydrogen phosphate
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
Infobox disclaimer and references

Trisodium phosphate (TSP), available at most hardware stores in white powder form, is a cleaning agent and degreaser, commonly used to prepare household surfaces for painting. It can also be called trisodium orthophosphate and has the chemical formula Na3PO4. It is a highly water-soluble ionic salt. Solutions of it dissolved in water have an alkaline pH. Image File history File links Trisodium_phosphate_hydrate. ... IUPAC nomenclature is a system of naming chemical compounds and of describing the science of chemistry in general. ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... The EINECS number (for European Inventory of Existing Chemical Substances) is a registry number given to each chemical substance commercially available in the European Union between 1 January 1971 and 18 September 1981. ... In physics, Density is defined as mass m per unit volume V. Mathematically, it is expressed as where, in SI units: ρ (rho) is the density of the substance, measured in kg m-3 m is the mass of the substance, measured in kg v is the volume of the substance... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... It has been suggested that this article or section be merged with Solution. ... This article describes water from a scientific and technical perspective. ... The melting point of a crystalline solid is the temperature at which it changes state from solid to liquid. ... In chemistry and biochemistry, the acid dissociation constant, the acidity constant, or the acid-ionization constant (Ka) is a specific type of equilibrium constant that indicates the extent of dissociation of hydrogen ions from an acid. ... The coordination geometry of an atom is the geometrical pattern formed by its neighbors in a molecule or a crystal. ... Enargite crystals In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ... In crystallography, the rhombohedral (or trigonal) crystal system is one of the 7 lattice point groups. ... The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states (the most stable form of the element at 1 atmosphere... In chemistry, the standard molar entropy is the entropy content of one mole of substance, under conditions of standard temperature and pressure. ... Council Directive 67/548/EEC of 27 June 1967 on the approximation of laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances (as amended) is the main source of European Union law concerning chemical safety. ... The Permissible Exposure Limit (PEL or OSHA PEL) is a legal limit in the United States for personal exposure to a substance, usually expressed in parts per million (ppm). ... If you are searching for the organization, click OSHA. Osha (Ligusticum porteri) is a perennial herb used for its medicinal properties. ... The flash point of a flammable liquid is the lowest temperature at which it can form an ignitable mixture with air. ... RTECS, also known as Registry of Toxic Effects of Chemical Substances, is a database of toxicity information compiled from the open scientific literature that is available for charge. ... The refractive index (or index of refraction) of a material is the factor by which the phase velocity of electromagnetic radiation is slowed in that material, relative to its velocity in a vacuum. ... The dielectric constant εr (represented as or K in some cases) is defined as the ratio: where εs is the static permittivity of the material in question, and ε0 is the vacuum permittivity. ... Ultraviolet-Visible Spectroscopy or Ultraviolet-Visible Spectrophotometry (UV/ VIS) involves the spectroscopy of photons (spectrophotometry). ... IR spectrum of a thin film of liquid ethanol. ... Nuclear Magnetic Resonance Spectroscopy most commonly known as NMR Spectroscopy is the name given to the technique which exploits the magnetic properties of nuclei. ... Basic schematic of a mass spectrometer Mass spectrometry (also known as mass spectroscopy (deprecated)[1] or in common speech mass-spec) is an analytical technique used to measure the mass-to-charge ratio of ions. ... Multivalent redirects here. ... Multivalent redirects here. ... In chemistry, the standard state of a material is its state at 1 bar (100 kilopascals) and 25 degrees Celsius (298. ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... Dissolving table salt in water This article is about a chemical solution; for other uses of the term solution, see solution (disambiguation). ... The common (Arrhenius) definition of a base is a chemical compound that either donates hydroxide ions or absorbs hydrogen ions when dissolved in water. ... The correct title of this article is . ...

It can also be found as a food additive, under E number E339; it is used as an acidity regulator (buffering agent), emulsifier, thickening agent, nutrition enlargement agent and sequestrant (metal-chelating agent). In these uses it may be known as simply sodium phosphate. It also goes by this name 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, it should not be confused with the related compounds sodium dihydrogen phosphate, also known as monosodium phosphate or MSP, and disodium hydrogen phosphate. For the mathematical constant see: E (mathematical constant). ... Acidity regulators, or pH control agents, are food additives added to change or maintain pH (acidity or basicity). ... A buffering agent adjusts the pH of a solution. ... An emulsion is a mixture of two immiscible substances. ... The introduction of this article does not provide enough context for readers unfamiliar with the subject. ... A sequestrant is a food additive whose role is to improve the quality and stability of the food products. ... Chelation (from Greek χηλή, chelè, meaning claw) is the process of reversible binding (complexation) of a ligand - the chelant, chelator, chelating agent, sequestering agent, or complexing agent - to a metal ion, forming a metal complex, the chelate. ... This 2qt (about 2 liters) enema bag, or fountain syringe, equipped with a rectal nozzle, is to be filled with water or a solution, then suspended near the patient using the hook. ... A laxative is a preparation used for encouraging defecation, or the expulsion of feces. ... Constipation or irregularity, is a condition of the digestive system where a person (or animal) experiences hard feces that are difficult to eliminate; it may be extremely painful, and in severe cases (fecal impaction) lead to symptoms of bowel obstruction. ... Over-the-counter substances, also abbreviated OTC, are drugs and other medical remedies that may be sold without a prescription and without a visit to a medical professional, in contrast to prescription only medicines (POM). ...

TSP for cleaning

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. Man and woman washing linen in a brook, from William Henry Pynes Microcosm, 1806. ... A Dishwasher A two drawer DishDrawer dishwasher. ... Laundry detergents are just only one of many possibilities of use of the detergents Detergent is a compound, or a mixture of compounds, intended to assist cleaning. ... Above is a ball-and-stick model of the inorganic hydrogenphosphate anion (HPO42−). Colour coding: P (orange); O (red); H (white). ... spreading manure, an organic fertilizer Fertilizers (British English fertilisers) are compounds given to plants to promote growth; they are usually applied either via the soil, for uptake by plant roots, or by foliar feeding, for uptake through leaves. ... An algal bloom is a relatively rapid increase in the population of (usually) phytoplankton algae in an aquatic system. ... The 1970s decade refers to the years from 1970 to 1979, inclusive. ... Sodium carbonate (also known as washing soda or soda ash), Na2CO3, is a sodium salt of carbonic acid. ...

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". Savogran's brand actually contains 80% trisodium phosphate dodecahydrate.

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. White spirit also known as Stoddard solvent is a paraffin derived clear, transparent liquid which is a common organic solvent used in painting and decorating. ... Sodium hypochlorite is a chemical compound with the formula NaClO. A solution of sodium hypochlorite is frequently used as a disinfectant and as a bleaching agent; indeed, often it is simply called bleach, though other chemicals are sometimes given that name as well. ... Mildew is a grey, mold-like growth caused by one of two different types of micro-organisms. ... Redwood can refer to: // Redwood is a name used for several species of tree with red or reddish coloured wood; see each species for individual details. ...

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.

External links

  • Links to external chemical sources



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