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Phosphoric acid

Phosphoric acid Suppliers list
Company Name: Hangzhou Bayee Chemical Co., Ltd.
Tel: 0086-571-86990109; 0086-18605816692
Products Intro: Product Name:Phosphoric Acid
Purity:85% Package:in 35kg or 330kg plastic drum, or 1000L IBC. Remarks:Food Grade
Company Name: Henan Tianfu Chemical Co.,Ltd.
Tel: 0371-55170693
Products Intro: CAS:7664-38-2
Purity:99% Package:500G;1KG;5KG;25KG
Company Name: Mainchem Co., Ltd.
Tel: 0592-6210733
Products Intro: Product Name:Phosphoric Acid
Company Name: Hefei TNJ Chemical Industry Co.,Ltd.
Tel: 86-0551-65418684 18949823763
Products Intro: Product Name:Phosphoric acid
Purity:99.9% Package:1KG;5USD
Company Name: Shanghai Macklin Biochemical Co.,Ltd.  Gold
Products Intro:Product Name:Phosphoric acid
Purity:Standard for GC, >=99% (GC) Package:5g
Phosphoric acid Basic information
Product Name:Phosphoric acid
Product Categories:INORGANIC & ORGANIC CHEMICALS;Inorganics;HPLC;HPLC Buffer;HPLC Buffers;HPLC Buffers - SolutionChromatography/CE Reagents;Solution;PAlphabetic;Analytical Standards;NMRStable Isotopes;P;PER - POLA;Spectroscopy;Alphabetical Listings;Flavors and Fragrances;O-P;Organic Phosphonates;inorganic acid;HPLC and LCMS Mobile Phase Additive;Pyridines;Food additives
Mol File:7664-38-2.mol
Phosphoric acid Structure
Phosphoric acid Chemical Properties
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
storage temp. Store below +30°C.
solubility H2O: soluble
pka2.1-7.2-12.3(at 25℃)
form Solid or Viscous Liquid
color ≤10(APHA)
PH<0.5 (100g/l, H2O, 20℃)
Water Solubility MISCIBLE
Merck 14,7344
CAS DataBase Reference7664-38-2(CAS DataBase Reference)
NIST Chemistry ReferencePhosphoric acid(7664-38-2)
EPA Substance Registry SystemPhosphoric acid(7664-38-2)
Safety Information
Hazard Codes C,Xn,T,F
Risk Statements 34-35-22-39/23/24/25-36/38-23/24/25-11
Safety Statements 7-16-26-36/37-45-36/37/39-1/2-24/25
RIDADR UN 3453 8/PG 3
WGK Germany 3
RTECS TB6300000
HazardClass 8
PackingGroup III
Hazardous Substances Data7664-38-2(Hazardous Substances Data)
MSDS Information
Phosphorous acid English
SigmaAldrich English
ACROS English
ALFA English
Phosphoric acid Usage And Synthesis
DescriptionPhosphoric acid was prepared first by Robert Boyle in 1694 by dissolving phosphorus pentoxide in water. Phosphoric acid 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 Phosphoric acid 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, dilute acid 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.
Chemical PropertiesClear liquid
UsesPhosphorous acid is used for reaction with inorganic and organic products, for water treatment, industrial and agricultural uses. It is also used to bleach industrial and cleaning supplies. Contact
DefinitionChEBI: A phosphorus oxoacid that consits of one oxo and three hydroxy groups joined covalently to a central phosphorus atom.
PreparationLow-purity technical grade phosphoric acid 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.
Phosphoric acid 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
UsesIn 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. Pharmaceutic aid (solvent). In dental cements; process engraving; rustproofing of metals before painting; coagulating rubber latex; as analytical reagent.
General DescriptionA 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. Shipped as both a solid and liquid. Corrosive to metals and tissue. Used in making fertilizers and detergents and in food processing.
Air & Water ReactionsSoluble in water with small release of heat.
Reactivity ProfilePhosphorous acid 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 [Lewis, 3rd ed., 1993, p. 1029].
Health HazardBurns on mouth and lips, sour acrid taste, severe gastrointestinal irritation, nausea, vomiting, bloody diarrhea, difficult swallowing, severe abdominal pains, thirst, acidemia, difficult breathing, convulsions, collapse, shock, death.
Fire HazardNon-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
ToxicityADI 0 to 70 mg / kg (total phosphate content in terms of phosphorus, FAO / WHO, 2001).
GRAS (FDA, § 182.1073, 2000).
LD501530mg / kg (rat, oral).
In case of daily intake of 2 ~ 4 g, it can cause mild diarrhea. The amount of sour agent used as a cola drink is 0.02% to 0.06%.
Tag:Phosphoric acid(7664-38-2) Related Product Information
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