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E 338 Phosphoric Acid 85% Food Grade, also called orthophosphoric acid, is a clear, colorless, mineral acid with moderate strength.
E 338 Phosphoric Acid 85% Food Grade is normally marketed as an aqueous solution of 75–85% in which it exists as a clear, viscous liquid.
E 338 Phosphoric Acid 85% Food Grade was prepared first by Robert Boyle in 1694 by dissolving phosphorus pentoxide in water.
CAS Number: 7664-38-2
Molecular Formula: H3O4P
Molecular Weight: 98
EINECS Number: 231-633-2
Synonyms: Phosphoric acid, 7664-38-2, ORTHOPHOSPHORIC ACID, o-Phosphoric acid, Wc-reiniger, Acidum phosphoricum, Sonac, Phosphorsaeure, Evits, Acide phosphorique, Phosphoricum acidum, Acido fosforico, Phosphorsaeureloesungen, Fosforzuuroplossingen, Vococid, White phosphoric acid, Phosphoric acid, ortho-, FEMA No. 2900, Amberphos 54, Superphosphoric acid, ortho-phosphoric acid, CCRIS 2949, HSDB 1187, trihydroxidooxidophosphorus, EINECS 231-633-2, H3PO4, UNII-E4GA8884NN, NSC 80804, NSC-80804, EPA Pesticide Chemical Code 076001, E4GA8884NN, DTXSID5024263, tetraoxophosphoric acid, CHEBI:26078, Phosphoric acid [NF], INS-338, MFCD00011340, Y-11A06, UN1805, DTXCID804263, INS NO.338, E 338, E-338, trihydrogen tetraoxophosphate(3-), EC 231-633-2, NSC80804, Phosphoric acid (NF), NCGC00091005-01, E338, Oleth-4 phosphate, PHOSPHORIC ACID (II), PHOSPHORIC ACID [II], PHOSPHORIC ACID (MART.), PHOSPHORIC ACID [MART.], (PO(OH)3), [PO(OH)3], Caswell No. 662, Phosphoric acid 75%, PHOSPHORIC ACID (USP-RS), PHOSPHORIC ACID [USP-RS], K-etchant, Acido fosforico [Italian], Acide phosphorique [French], Fosforzuuroplossingen [Dutch], CAS-7664-38-2, Phosphorsaeureloesungen [German], Phosphoric acid 85%, Phosphoric acid, ACS reagent, >=85 wt. % in H2O, Phosphoric acid (aqueous), Phospholeum, NaturasilAcne, phosphoric cid, Ortho-phosphate, phosphor-ic acid, NFB Orthophosphate, 2HP, NaturasilBite Relief, Orthophosphate(3-), KEFO, ortho phosphoric acid, Phosphate ion(3-), 62046-92-8, Phosphate anion(3-), MIKRO KLENE DF, Phosphoricum acidum 6C, NaturasilCherry Angiomas, Phosphate (PO43-), Phosphoric acid, 75%, Phosphoric acid, 85%, Orthophosphate (PO43-), Phosphoric acid ion(3-), Phosphoricum acidum 200C, Phosphate ion (PO43-), SPA 2 (CATALYST), CHEMBL1187, Phosphoric acid, 10% v/v, Phosphoric acid, Crystalline, SPA 2, PHOSPHORIC ACID [MI], PHOSPHORIC ACID [FCC], Phosphoricum Acidum Kit Refill, PHOSPHORIC ACID [FHFI], PHOSPHORIC ACID [HSDB], DECON 4512, PHOSPHORIC ACID [VANDF], PHOSPHORIC ACID, AQUEOUS, Phosphoric acid, AR, >=88%, Phosphoric acid, technical grade, BDBM14671, CHEBI:52641, H3 P O4, PHOSPHORIC ACID [WHO-DD], C 134 (ACID), C 434 (ACID), Phosphoric acid, AR, 88-93%, Phosphoric acid, LR, 88-93%, PHOSPHORICUM ACIDUM [HPUS], Phosphoric acid, 85%, ACS grade, Phosphoric acid, puriss., >=99%, Phosphoric acid, 85%, HPLC grade, Tox21_111053, Tox21_202285, Tox21_303246, Phosphoric acid, ACS reagent, 85%, PHOSPHORIC ACID [ORANGE BOOK], Phosphoric acid, for HPLC, >=85%, AKOS028109726, DB09394, FP36491, USEPA/OPP Pesticide Code: 076001, NCGC00091005-02, NCGC00257071-01, NCGC00259834-01, Phosphoric acid [UN1805] [Corrosive], Phosphoric acid, BioUltra, >=85% (T), NS00013561, P1745, Phosphoric acid, SAJ first grade, >=85.0%, C00009, D05467, Phosphoric acid, JIS special grade, >=85.0%, Q184782, ETIDRONATE DISODIUM IMPURITY A [EP IMPURITY], Q27110336, Phosphoric acid, p.a., ACS reagent, reag. ISO, 85%, Phosphoric acid, 85% in H2O, 99.99% trace metal basis, ZOLEDRONIC ACID MONOHYDRATE IMPURITY F [EP IMPURITY], 730A9101-D5DE-4668-97CA-7B6178B84417, Phosphoric acid, crystalline, >=99.999% trace metals basis, Phosphoric acid, puriss. p.a., crystallized, >=99.0% (T), PAMIDRONATE DISODIUM PENTAHYDRATE IMPURITY B [EP IMPURITY], Phosphoric acid, 85 wt. % in H2O, 99.99% trace metals basis, Phosphoric acid, BioReagent, suitable for insect cell culture, 85%, Phosphoric acid, United States Pharmacopeia (USP) Reference Standard, ortho-Phosphoric acid (3 N), 1 mol/l - 3 N volumetric standard solution, Phosphoric acid, >=85 wt. % in H2O, >=99.999% trace metals basis, Phosphoric acid, semiconductor grade VLSI PURANAL(TM) (Honeywell 17644), ortho-Phosphoric acid (0,3 N), 0,1 mol/l-0,3 N volumetric standard solution, Phosphoric acid, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., >=85%, Phosphoric acid, semiconductor grade MOS PURANAL(TM) (Honeywell 17938), >=85%, Phosphoric acid, semiconductor grade PURANAL(TM) (Honeywell 17861), >=85%, 231-633-2, 616-646-7, Phosphoric acid, puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, 85.0-88.0%, phosphoricacidsolutions;Phosphorsaeureloesungen;Sonac;wc-reiniger;White phosphoric acid;whitephosphoricacid;phosphoric acid for technical;phosphoric acid，technical，highly purified
E 338 Phosphoric Acid 85% Food Grade is a colorless, odorless, crystalline solid or a thick syrupy liquid. Physical state is strength and temperature dependent.
Concentrated phosphoric acid occurs as a colorless, odorless, syrupy liquid.
E 338 Phosphoric Acid 85% Food Grade has a pleasing acid taste when suitably diluted.
E 338 Phosphoric Acid 85% Food Grade is probably the most important compound of phosphorus.
It is the second largest inorganic chemical by volume, after sulfuric acid, marketed in the United States.
The single most important application of E 338 Phosphoric Acid 85% Food Grade is manufacturing phosphate salts for fertilizers.
Such fertilizer phosphates include sodium, calcium, ammonium, and potassium phosphates.
Other applications are in metal pickling and surface treatment for removal of metal oxides from metal surfaces; electropolishing of aluminum; as a bonding agent in various refractory products such as alumina and magnesia; as a catalyst in making nylon and gasoline; as a dehydrating agent; in fireproofing wood and fabrics; in lithographic engraving; in textile dyeing; in dental cement; in coagulating rubber latex; in purifying hydrogen peroxide; and as a laboratory reagent.
Dilute solutions of phosphoric acid are used as additives to carbonated beverages for a pleasing sour taste.
Also, E 338 Phosphoric Acid 85% Food Grade is used in refining sugar; as a nutrient; and as a buffering agent in preparing jam, jelly, and antibiotics.
The commercial phosphoric acid is 85% (w/w) in strength.
E 338 Phosphoric Acid 85% Food Grade is used to acidify foods and beverages.
E 338 Phosphoric Acid 85% Food Grade provides a tangy or sour taste and, being a mass-produced chemical, is available cheaply and in large quantities.
E 338 Phosphoric Acid 85% Food Grade, used in many soft drinks, has been linked to lower bone density in epidemiological studies.
In brief, E 338 Phosphoric Acid 85% Food Grade is a strong acid and common industrial chemical used in the manufacture of a wide number of products, notably porcelain and metal cleaners, detergents, and fertilisers.
E 338 Phosphoric Acid 85% Food Grade is also used as a food additive and is a major constituent of many soft drinks.
Low phosphate concentrations are found in drinking water to which it is added in some areas in order to reduce lead solubility.
Chemists refer to orthophosphoric acid as E 338 Phosphoric Acid 85% Food Grade, which is the IUPAC name for this compound.
The prefix “ortho” is used to distinguish the acid from other E 338 Phosphoric Acid 85% Food Grades, which are generally called polyphosphoric acids.
E 338 Phosphoric Acid 85% Food Grade is a nontoxic, rather weak triprotic acid. When pure, it is a solid at STP.
E 338 Phosphoric Acid 85% Food Grade is a very polar molecule which makes it highly soluble in water.
The valence state of phosphorous in orthophosphoric acid and other phosphoric acids is ＋5.
Triprotic means that the E 338 Phosphoric Acid 85% Food Grade molecule can dissociate up to three times, producing a hydrogen cation, H+, each time.
The majority of E 338 Phosphoric Acid 85% Food Grade is made by digesting phosphate rock (essentially tricalcium phosphate) with sulfuric acid; the phosphoric acid is then separated by slurry filtration.
Purification is achieved via chemical precipitation, solvent extraction, crystallization, or ion exchange.
E 338 Phosphoric Acid 85% Food Grade, is a highly concentrated, food-safe version of phosphoric acid that is commonly used as an acidity regulator and preservative in the food and beverage industry.
E 338 Phosphoric Acid 85% Food Grade contains approximately 85% pure phosphoric acid dissolved in water, making it a strong, corrosive liquid that must be handled with care, even though it is approved for use in food products.
In soft drinks—especially in colas—E 338 is widely used to give the beverage its sharp, tangy flavor and to help balance the sweetness, contributing to the signature taste profile that consumers expect.
Additionally, it acts as a preservative, helping to extend the shelf life of processed foods by inhibiting the growth of mold and bacteria, especially in sugary or high-moisture environments.
E 338 Phosphoric Acid 85% Food Grade also serves functional roles in other food applications; for example, it is used in cheese production to adjust pH levels, in canned vegetables to retain firmness, and in meat products to improve texture and moisture retention.
The “food grade” designation means that this version of E 338 Phosphoric Acid 85% Food Grade has been manufactured and purified to meet strict standards of safety, purity, and quality suitable for human consumption.
Low-purity technical grade E 338 Phosphoric Acid 85% Food Grade for use in fertilizers is produced from phosphate rocks by digestion with concentrated sulfuric acid.
The apatite types, primarily consisting of calcium phosphate phosphate rocks, are used: Ca3(PO4)2 + 3H2SO4 + 6H2O → 2H3PO4 + 3(CaSO4•2H2O)
The insoluble calcium sulfate slurry is filtered out.
Acid from this wet process is impure but can be purified by various methods.
Purification steps involve precipitation, solvent extraction, crystallization, and ion exchange techniques.
E 338 Phosphoric Acid 85% Food Grade also can be made by many different methods.
Dissolution of phosphorus pentoxide in water and boiling yields phosphoric acid. Pure phosphoric acid can be obtained by burning phosphorus in a mixture of air and steam: P4 (l) + 5O2 (g) →P4O10 (s), P4O10 (s) + H2O (g) → 4H3PO4 (l)
The acid also may be prepared by heating violet phosphorus with 33% nitric acid: 4P + 10HNO3 + H2O → 4H3PO4 + 5NO ↑ + 5NO2 ↑ or by heating red phosphorus with nitric acid (1:1).
The overall equation is: P + 3HNO3 → H3PO4 + NO + 2NO2
E 338 Phosphoric Acid 85% Food Grade reacts exothermically with bases. May react with active metals, including such structural metals as aluminum and iron, to release hydrogen, a flammable gas.
Can initiate the polymerization of certain classes of organic compounds reacts with cyanide compounds to release gaseous hydrogen cyanide.
May generate flammable and/or toxic gases in contact with dithiocarbamates, isocyanates, mercaptans, nitrides, nitriles, sulfides, and strong reducing agents.
Forms explosive mixture with nitromethane reacts violently with sodium tetrahydroborate.
In the presence of chlorides can corrode stainless steel to form explosive hydrogen gas.
Emits toxic and irritating fumes of oxides of phosphorus when heated to decomposition.
E 338 Phosphoric Acid 85% Food Grade is less corrosive and hazardous than is concentrated sulfuric or nitricacid.
Its concentrated solutions are irritantsto the skin and mucous membranes.
Thevapors (P2O5 fumes) can cause irritation tothe throat and coughing but could be tolerated at <10 mg/m3.
The acute oral toxicity in rats is reported tobe low, the LD50 value being 1530 mg/kg(NIOSH 1986).
E 338 Phosphoric Acid 85% Food Grade is produced industrially by two general routes.
In the wet process a phosphate-containing mineral such as calcium hydroxyapatite is treated with sulfuric acid.
E 338 Phosphoric Acid 85% Food Grade is an inorganic compound acid derived from the mineral phosphorus.
E 338 Phosphoric Acid 85% Food Grade is a crystalline solid, but in its less concentrated form it is a colorless syrupy liquid.
E 338 Phosphoric Acid 85% Food Grade is used to acidify foods and beverages, and serves as a starting point to produce many phosphate derivatives.
E 338 Phosphoric Acid 85% Food Grade is a colorless, odorless phosphorus-containing inorganic acid.
E 338 Phosphoric Acid 85% Food Grade is a sequestering agent which binds many divalent cations, including Fe++, Cu++, Ca++, and Mg++.
E 338 Phosphoric Acid 85% Food Grade is an important industrial chemical used as an intermediate in the fertilizer industry, for metal surface treatment in the metallurgical industry and as an additive in the food industry.
E 338 Phosphoric Acid 85% Food Grade is a colorless, odorless phosphorus-containing inorganic acid.
E 338 Phosphoric Acid 85% Food Grade is a sequestering agent which binds many divalent cations, including Fe++, Cu++, Ca++, and Mg++.
E 338 Phosphoric Acid 85% Food Grade is used in dentistry and orthodontics as an etching solution, to clean and roughen the surfaces of teeth where dental appliances or llings will be placed.
In addition, E 338 Phosphoric Acid 85% Food Grade is a constituent in bone and teeth, and plays a role in many metabolic processes.
E 338 Phosphoric Acid 85% Food Grade appears as a clear colorless liquid or transparent crystalline solid.
The pure solid melts at 42.35°C and has a density of 1.834 g / cm3.
Liquid is usually an 85% aqueous solution.
E 338 Phosphoric Acid 85% Food Grade, also known as orthophosphoric acid or phosphoric(V) acid, is a weak acid with the chemical formula H3PO4.
E 338 Phosphoric Acid 85% Food Grade is normally encountered as a colorless, syrup of 85 % concentration in water.
The pure compound is a colorless solid. All three hydrogens are acidic to varying degrees and can be lost from the molecule as H+ ions (protons).
When all three H+ ions are removed, the result is an orthophosphate ion PO43−, commonly called "phosphate".
Removal of one or two protons gives dihydrogen phosphate ion H2PO−4, and the hydrogen phosphate ion HPO2−4, respectively.
E 338 Phosphoric Acid 85% Food Grade also forms esters, called organophosphates.
E 338 Phosphoric Acid 85% Food Grade is commonly encountered in chemical laboratories as an 85 % aqueous solution, which is a colourless, odourless, and non-volatile syrupy liquid.
Although phosphoric acid does not meet the strict definition of a strong acid, the 85 % solution can still severely irritate the skin and damage the eyes.
The name "orthophosphoric acid" can be used to distinguish this specific acid from other "phosphoric acids", such as pyrophosphoric acid.
Nevertheless, the term "phosphoric acid" often means this specific compound; and that is the current IUPAC nomenclature.
E 338 Phosphoric Acid 85% Food Grade is used to acidify foods and beverages such as various colas and jams, providing a tangy or sour taste.
Soft drinks containing phosphoric acid, which would include Coca-Cola, are sometimes called phosphate sodas or phosphates.
E 338 Phosphoric Acid 85% Food Grade in soft drinks has the potential to cause dental erosion.
E 338 Phosphoric Acid 85% Food Graded also has the potential to contribute to the formation of kidney stones, especially in those who have had kidney stones previously.
E 338 Phosphoric Acid 85% Food Grade is a colorless, odorless phosphorus-containing solid, and inorganic compound with the chemical formula H3PO4.
It is commonly encountered as an 85% aqueous solution, which is a colourless, odourless, and non-volatile syrupy liquid.
E 338 Phosphoric Acid 85% Food Grade is a major industrial chemical, being a component of many fertilizers.
The compound is an acid. Removal of all three H+ ions gives the phosphate ion PO3−4.
Removal of one or two protons gives dihydrogen phosphate ion H2PO−4, and the hydrogen phosphate ion HPO2−4, respectively.
E 338 Phosphoric Acid 85% Food Grade forms esters, called organophosphates.
The name "orthophosphoric acid" can be used to distinguish this specific acid from other "phosphoric acids", such as pyrophosphoric acid.
Nevertheless, the term "phosphoric acid" often means this specific compound; and that is the current IUPAC nomenclature.
E 338 Phosphoric Acid 85% Food Grade is a by-product, which is removed as phosphogypsum.
The hydrogen fluoride (HF) gas is streamed into a wet (water) scrubber producing hydrofluoric acid.
In both cases the phosphoric acid solution usually contains 23–33% P2O5 (32–46% H3PO4).
E 338 Phosphoric Acid 85% Food Grade may be concentrated to produce commercial- or merchant-grade phosphoric acid, which contains about 54–62% P2O5 (75–85% H3PO4).
Further removal of water yields superphosphoric acid with a P2O5 concentration above 70% (corresponding to nearly 100% H3PO4).
The phosphoric acid from both processes may be further purified by removing compounds of arsenic and other potentially toxic impurities.
Melting point: ~40 °C (lit.)
Boiling point: 158 °C (lit.)
Density: 1.685 g/mL at 25 °C (lit.)
Vapor density: 3.4 (vs air)
Vapor pressure: 2.2 mm Hg (20 °C)
Refractive index: n20/D 1.433
FEMA: 2900 | PHOSPHORIC ACID
Storage temp.: no restrictions.
Solubility: H₂O: soluble
pKa: 2.1–7.2–12.3 (at 25 ℃)
Form: Solid or Viscous Liquid
Color: ≤10 (APHA)
Specific Gravity: 1.7
Odor: Odorless
pH Range: 1.5
pH: 3.06 (1 mM solution); 2.26 (10 mM solution); 1.63 (100 mM solution)
Biological source: synthetic
Water Solubility: MISCIBLE
λmax: λ: 260 nm Amax: ≤0.05; λ: 280 nm Amax: ≤0.04
Merck: 14,7344
BRN: 1921286
Dielectric constant: 61.0
Exposure limits: TLV-TWA 1 mg/m³ (ACGIH, MSHA, and OSHA); TLV-STEL 3 mg/m³ (ACGIH)
InChIKey: NBIIXXVUZAFLBC-UHFFFAOYSA-N
LogP: -2.15
E 338 Phosphoric Acid 85% Food Grade is a phosphorus oxoacid that consists of one oxo and three hydroxy groups joined covalently to a central phosphorus atom.
E 338 Phosphoric Acid 85% Food Grade has a role as a solvent, a human metabolite, an algal metabolite and a fertilizer.
E 338 Phosphoric Acid 85% Food Grade is a conjugate acid of a dihydrogenphosphate and a phosphate ion.
E 338 Phosphoric Acid 85% Food Grade was produced but not identified by alchemists in ancient times.
It derives its name from the element phosphorus, which was discovered in 1669 by Henning Brand (1630 1710).
Scheele subsequently isolated phosphorus from bone ash and produced phosphoric acid by reacting phosphorus and nitric acid.
Scheele's method replaced bone as the main source of phosphorus rather than urine.
John Bennett Lawes (1814 1900) patented a process in 1841 of making superphosphate from bones and later extended his process to phosphates obtained from rock.
Superphosphates are made by treating Ca3(PO4)2 with sulfuric acid to make more soluble calcium hydrogen phosphates: Ca3(PO4)2 + 2H2SO4 Ca(H2PO4)2 + 2CaSO4.
In this reaction Ca(H2PO4)2 is monobasic calcium phosphate, which is also called superphosphate.
E 338 Phosphoric Acid 85% Food Grade are more water soluble and therefore more readily available to plants.
The major sources of H3PO4 traditionally have been mineral deposits of phosphate rock.
Mining operations are extensive in a number of locations, including the United States (Florida), the Mediterranean area, and Russia, among others.
The major constituent of most phosphate rocks is fluorapatite, 3Ca3(PO4)2·CaF2.
The supply of high-grade phosphates, the raw material of choice for producing high-purity phosphoric acid by the wet process, is rapidly decreasing in some areas.
Two major methods are utilized for the production of phosphoric acid from phosphate rock.
The wet process involves the reaction of phosphate rock with sulfuric acid to produce phosphoric acid and insoluble calcium sulfates.
Many of the impurities present in the phosphate rock are also solubilized and retained in the acid so produced.
While they are of no serious disadvantage when the acid is to be used for fertilizer manufacture, their presence makes the product unsuitable for the preparation of phosphatic chemicals.
In the other method, the furnace process, phosphate rock is combined with coke and silica and reduced at high temperature in an electric furnace, followed by condensation of elemental phosphorus.
E 338 Phosphoric Acid 85% Food Grade is produced by burning the elemental phosphorus with air and absorbing the P2O5 in water.
The acid produced by this method is of high purity and suitable for nearly all uses with little or no further treatment.
The elemental phosphorus is burned to produce phosphorous pentoxide (P2O5), which is then hydrated.
The heat is then removed and the E 338 Phosphoric Acid 85% Food Grade is collected as a fine mist.
Another important source of phosphoric acid is from phosphate rocks by treatment with sulfuric acid; this is the so-called wet-acid process.
The synthesis of pure phosphoric acid involves several steps including a time-consuming, expensive step, the sublimation of white phosphorus.
When stored at a low temperature, phosphoric acid may solidify, forming a mass of colorless crystals, comprising the hemihydrate, which melts at 28°C.
E 338 Phosphoric Acid 85% Food Grade should be stored in an airtight container in a cool, dry place. Stainless steel containers may be used.
Accepted as a food additive in Europe included in theFDA Inactive Ingredients Database (infusions, injections, oral solutions, topical creams, lotions, ointments and solutions, and vaginal preparations).
Included in nonparenteral and parenteral medicines licensed in the UK included in the Canadian List of Acceptable Non-medicinal Ingredients.
E 338 Phosphoric Acid 85% Food Grade is used in a wide array of applications including the manufacturing of phosphate salts.
In addition to being a chemical reagent, E338 (Phosphoric acid) Food Grade is used as an ingredient in foods and beverages.
E 338 Phosphoric Acid 85% Food Grade is typically used for pH control in the food industry, for example in the manufacture of cheese products, fats, and shortenings.
E 338 Phosphoric Acid 85% Food Grade is also used in the beverage industry in soft drinks, particularly cola.
E 338 Phosphoric Acid 85% Food Grade is used in plant nutrition applications to provide precise and targeted fortication with watersoluble solutions.
E 338 Phosphoric Acid 85% Food Grade is also used for water treatment, metal nishing, construction, and other industrial applications.
E 338 Phosphoric Acid 85% Food Grade is also known as ortohphosphoric acid and is classed as a weak acid.
Austenitic stainless steels have good corrosion resistance to chemically pure E338 (Phosphoric acid).
E 338 Phosphoric Acid 85% Food Grade (WPA) can be aggressive.
E 338 Phosphoric Acid 85% Food Grade is used as a chemical-cleaning agent for stainless steels but is not considered to be a ‘passivating’ acid.
To produce food-grade E 338 Phosphoric Acid 85% Food Grade, phosphate ore is first reduced with coke in an electric arc furnace, to give elemental phosphorus.
This process is also known as the thermal process or the electric furnace process.
Silica is also added, resulting in the production of calcium silicate slag.
Elemental phosphorus is distilled out of the furnace and burned with air to produce high-purity phosphorus pentoxide, which is dissolved in water to make phosphoric acid.
The thermal process produces E 338 Phosphoric Acid 85% Food Grade with a very high concentration of P2O5 (about 85%) and a low level of impurities.
However, this process is more expensive and energy-intensive than the wet process, which produces E 338 Phosphoric Acid 85% Food Grade with a lower concentration of P2O5 (about 26–52%) and a higher level of impurities.
The wet process is the most common method of producing phosphoric acid for fertilizer use.
Even in China, where the thermal process is still used quite widely due to relatively cheap coal as opposed to the sulfuric acid, over 7/8 of phosphoric acid is produced with wet process.
E 338 Phosphoric Acid 85% Food Grades produced from phosphate rock or thermal processes often requires purification.
A common purification methods is liquid–liquid extraction, which involves the separation of phosphoric acids from water and other impurities using organic solvents, such as tributyl phosphate (TBP), methyl isobutyl ketone (MIBK), or n-octanol.
Nanofiltration involves the use of a premodified nanofiltration membrane, which is functionalized by a deposit of a high molecular weight polycationic polymer of polyethyleneimines.
Nanofiltration has been shown to significantly reduce the concentrations of various impurities, including cadmium, aluminum, iron, and rare earth elements.
The laboratory and industrial pilot scale results showed that this process allows the production of food-grade phosphoric acid.
Fractional crystallization can achieve highest purities typically used for semiconductor applications.
Usually a static crystallizer is used.
A static crystallizer uses vertical plates, which are suspended in the molten feed and which are alternatingly cooled and heated by a heat transfer medium.
The process begins with the slow cooling of the heat transfer medium below the freezing point of the stagnant melt.
This cooling causes a layer of crystals to grow on the plates.
Impurities are rejected from the growing crystals and are concentrated in the remaining melt.
After the desired fraction has been crystallized, the remaining melt is drained from the crystallizer.
The purer crystalline layer remains adhered to the plates.
In a subsequent step, the plates are heated again to liquify the crystals and the purified phosphoric acid drained into the product vessel.
The crystallizer is filled with feed again and the next cooling cycle is started.
Uses Of E 338 Phosphoric Acid 85% Food Grade:
E 338 Phosphoric Acid 85% Food Grade is second only to sulfuric acid as an industrial acid and consistently ranksin the top 10 chemicals used globally.
States, but it is used in a number of other applications.
Phosphates were used as builders and water softeners.
A builder is a substance added to soaps or detergentsto increase their cleansing power.
E 338 Phosphoric Acid 85% Food Grade is used as an intermediate in the production of animal feed supplements,water treatment chemicals, metal surface treatments, etching agent, and personal care productssuch as toothpaste.
E 338 Phosphoric Acid 85% Food Grade is used as a catalyst in the petroleum and polymer industry.
E 338 Phosphoric Acid 85% Food Grade is used in food as a preservative, an acidulant, and flavor enhancer; it acidifies carbonateddrinks such as Coca Cola and Pepsi, giving them a tangy flavor.
E 338 Phosphoric Acid 85% Food Grade is used as arust remover and metal cleaner.
Naval Jelly is approximately 25% phosphoric acid.
Other usesfor phosphoric acid include opacity control in glass production, textile dyeing, rubber latexcoagulation, and dental cements.
E 338 Phosphoric Acid 85% Food Grade is the most important oxoacid of phosphorus and its main use is in the manufacture of fertilisers.
Within the human body, phosphate is the main phosphorus-containing compound.
E 338 Phosphoric Acid 85% Food Grade is an inorganic compound and is the salt of phosphoric acid.
It can form organic esters with a variety of compounds and these are important in many biochemical processes.
E 338 Phosphoric Acid 85% Food Grade has the empirical formula PO43-.
E 338 Phosphoric Acid 85% Food Grade is a tetrahedral molecule, where the central phosphorus atom is surrounded by four oxygen atoms.
In biological systems, phosphate is often found either as the free ion (inorganic phosphate) or as an ester after reaction with organic compounds (often referred to as organic phosphates).
E 338 Phosphoric Acid 85% Food Grade is a mixture of HPO42- and H2PO4- at physiological pH.
E 338 Phosphoric Acid 85% Food Grade is an acidulant that is an inorganic acid produced by burning phosphorus in an excess of air, producing phosphorus pentoxide which is dissolved in water to form orthophosphoric acid of varying concentrations.
E 338 Phosphoric Acid 85% Food Grade is a strong acid which is soluble in water.
The acid salts are termed phosphates.
E 338 Phosphoric Acid 85% Food Grade is used as a flavoring acid in cola and root beer beverages to provide desirable acidity and sourness.
E 338 Phosphoric Acid 85% Food Grade is used as a synergistic antioxidant in vegetable shorten- ings.
In yeast manufacture, it is used to maintain the acidic ph and provide a source for phosphorus.
E 338 Phosphoric Acid 85% Food Grade also functions as an acidulant in cheese.
E 338 Phosphoric Acid 85% Food Grade is also termed orthophosphoric acid.
E 338 Phosphoric Acid 85% Food Grade has a wide range of uses in the food and beverage industry, primarily due to its strong acidity, preservative qualities, and ability to control pH levels in various products.
In the beverage sector, particularly in carbonated soft drinks like colas, E 338 Phosphoric Acid 85% Food Grade is extensively used to create a tart, tangy taste that balances the sweetness of sugar or artificial sweeteners, while also acting as a preservative by lowering the pH, which inhibits the growth of microorganisms.
E 338 Phosphoric Acid 85% Food Grade plays a crucial role in enhancing the overall flavor profile of sodas and giving them the familiar sharpness that consumers associate with those drinks.
In processed and packaged foods, E 338 Phosphoric Acid 85% Food Grade is often added as an acidity regulator to stabilize and maintain the desired pH levels, which helps preserve color, flavor, and texture over time, especially in canned vegetables, jams, sauces, and dairy products.
It is particularly useful in preventing spoilage and extending shelf life by creating conditions that are hostile to bacteria, molds, and yeasts.
In dairy processing, E 338 Phosphoric Acid 85% Food Grade helps in coagulating milk proteins during cheese production and in balancing acidity for flavor enhancement and microbial stability.
It is also used in meat and poultry products to retain moisture, improve texture, and prevent spoilage during storage and distribution.
E 338 Phosphoric Acid 85% Food Grade is sometimes found in nutritional supplements and pharmaceutical formulations, where it can serve as a buffering agent or mineral source, especially in calcium-phosphate combinations used to strengthen bones and teeth.
In the manufacture of superphosphates for fertilizers, other phosphate salts, polyphosphates, detergents.
Acid catalyst in making ethylene, purifying hydrogen peroxide. As acidulant and flavor, synergistic antioxidant and sequestrant in food.
In dental cements; process engraving; rustproofing of metals before painting; coagulating rubber latex; as analytical reagent.
E 338 Phosphoric Acid 85% Food Grade, also known as orthophosphoric acid, is the most significant source of phosphate fertilizers.
E 338 Phosphoric Acid 85% Food Grade based fertilizers mainly include ammonium phosphate, diammonium phosphate and monoammonium phosphate.
E 338 Phosphoric Acid 85% Food Grade is deliquescent and commercially the most important derivative of phosphorus, accounting for over 90% of the phosphate rock mined.
The white rhombic solid is highly soluble in water and ethanol, and the concentrated aqueous solution is generally available for use.
E 338 Phosphoric Acid 85% Food Grade is used in several industries other than the fertilizer industry.
Most elemental phosphorus is converted into phosphoric acid for non-fertilizer use.
There are two basic processes for the production of phosphoric acid.
Metaphosphoric acid is obtained by heating E 338 Phosphoric Acid 85% Food Grade until dense white fumes begin to appear.
The product is highly deliquescent and glassy in appearance.
Its salts are known as metaphosphates.
E 338 Phosphoric Acid 85% Food Grade is the most common and is used as an important phosphate ingredient in commercial fertilizers.
E 338 Phosphoric Acid 85% Food Grade is widely used as an acidifying agent in a variety of pharmaceutical formulations.
It is used in pharmaceutical products as part of a buffer system when combined with a phosphate salt such as sodium phosphate, monobasic or dibasic.
It is also widely used in food preparations as an acidulant, flavor, and synergistic antioxidant (0.001–0.005%) and sequestrant.
Therapeutically, dilute phosphoric acid has been used welldiluted in preparations used in the treatment of nausea and vomiting.
E 338 Phosphoric Acid 85% Food Grade gel has also been used to etch tooth enamel and to enhance delivery of drugs through the nail.
Nanosized hydroxyapatite powder was made by combining phosphoric acid with egg shells.
As a cleanser for metals, E 338 Phosphoric Acid 85% Food Grade produces a light etch on steel, aluminum, or zinc, which aids paint adhesion.
Deoxidine is a phosphoric acid cleanser for metals. Nielite D is phosphoric acid with a rust inhibitor, used as a nonfuming pickling acid for steel.
Albrite is available in 75, 80, and 85% concentrations in food and electronic grades, both high-purity specifications.
DAB and Phosbrite are called Bright Dip grades, for cleaning applications.
Phosphoric anhydride, or phosphorus pentoxide, P2O5, is a white, water-soluble powder used as a dehydrating agent and also as an opalizer for glass.
E 338 Phosphoric Acid 85% Food Grade is also used as a catalyst in asphalt coatings to prevent softening at elevated temperatures and brittleness at low temperatures.
Safety Profile Of E 338 Phosphoric Acid 85% Food Grade:
Human poison by ingestion moderately toxic by skin contact.
A corrosive irritant to eyes, skin, and mucous membranes, and a systemic irritant by inhalation.
A common air contaminant a strong acid.
Mixtures with nitromethane are explosive reacts with chlorides + stainless steel to form explosive hydrogen gas.
Potentially violent reaction with solum tetrahydroborate.
Dangerous; when heated to decomposition it emits toxic fumes of POx
In the concentrated form, phosphoric acid is an extremely corrosive and harmful acid.
However, when used in pharmaceutical formulations it is usually very diluted and is generally regarded as an essentially nontoxic and nonirritant material.
E 338 Phosphoric Acid 85% Food Grade is considered generally safe for use in food when consumed in appropriate amounts, but it does carry certain hazards, particularly in its concentrated form or when consumed excessively over time.
In concentrated liquid form, E 338 Phosphoric Acid 85% Food Grade is a corrosive substance, and direct contact can cause severe irritation or burns to the skin, eyes, and mucous membranes.
If inhaled as vapors or mist, it may irritate the respiratory tract, leading to coughing, shortness of breath, or sore throat.
Accidental ingestion of the concentrated solution can result in chemical burns in the mouth, throat, esophagus, or stomach, making it dangerous to handle without proper protective equipment in industrial or laboratory settings.
From a dietary health perspective, excessive consumption of E 338 Phosphoric Acid 85% Food Grade—especially from frequent intake of soft drinks containing E 338—has been linked to reduced bone mineral density and an increased risk of osteoporosis, as high phosphorus levels can interfere with the body's ability to absorb calcium effectively.
E 338 Phosphoric Acid 85% Food Grade may also lead to dental erosion, as the acid can weaken tooth enamel over time, especially with prolonged exposure.
Additionally, high intake of phosphoric acid may contribute to kidney problems, including a greater risk of developing kidney stones or chronic kidney disease, particularly in people who are already susceptible due to other medical conditions or poor hydration.
