CAS #:

Linear Formula:

Fe3(PO4)2• 8H2O

MDL Number:


EC No.:



(2N) 99% Iron(II) Phosphate Octahydrate
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(3N) 99.9% Iron(II) Phosphate Octahydrate
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(4N) 99.99% Iron(II) Phosphate Octahydrate
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(5N) 99.999% Iron(II) Phosphate Octahydrate
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Iron(II) Phosphate Octahydrate Properties (Theoretical)

Compound Formula Fe3H16O16P2
Molecular Weight 501.6
Appearance Red to brown powder
Melting Point 180 °C
Boiling Point N/A
Density 2.58 g/cm3
Solubility in H2O Insoluble
Exact Mass 501.796165 g/mol
Monoisotopic Mass 501.796165 g/mol

Iron(II) Phosphate Octahydrate Health & Safety Information

Signal Word N/A
Hazard Statements N/A
Hazard Codes N/A
RTECS Number N/A
Transport Information NONH for all modes of transport

About Iron(II) Phosphate Octahydrate

Iron(II) Phosphate Octahydrate is generally immediately available in most volumes. American Elements manufactures materials to many standard grades when applicable including Mil Spec (military grade), ACS, Reagent and Technical Grades; Food, Agricultural and Pharmaceutical Grades, Optical, Semiconductor, and Electronics Grades, and follows applicable USP, EP/BP, and ASTM testing standards. Most materials can be produced in high and ultra high purity forms (99%, 99.9%, 99.99%, 99.999%, and higher). Standard and custom packaging is available. Additional technical, research and safety (SDS) information is available. Please request a quote above to receive pricing information based on your specifications.

Iron(II) Phosphate Octahydrate Synonyms

Ferrous phosphate octahydrate, Iron(2+) diphosphate octahydrate, Iron orthophosphate octahydrate, Triiron bis(orthophosphate) octahydrate, Phosphoric acid, iron(2+) salt (2:3), octahydrate, Vivianite

Chemical Identifiers

Linear Formula Fe3(PO4)2• 8H2O
MDL Number MFCD00054213
EC No. 239-018-0
Pubchem CID 44151620
IUPAC Name iron(2+); diphosphate; octahydrate
SMILES O.O.O.O.O.O.O.O.[O-]P(=O)([O-])[O-].[O-]P(=O)([O-])[O-].[Fe+2].[Fe+2].[Fe+2]
InchI Identifier InChI=1S/3Fe.2H3O4P.8H2O/c;;;2*1-5(2,3)4;;;;;;;;/h;;;2*(H3,1,2,3,4);8*1H2/q3*+2;;;;;;;;;;/p-6

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Elements


See more Iron products. Iron (atomic symbol: Fe, atomic number: 26) is a Block D, Group 8, Period 4 element with an atomic weight of 55.845. The number of electrons in each of Iron's shells is 2, 8, 14, 2 and its electron configuration is [Ar] 3d6 4s2. Iron Bohr ModelThe iron atom has a radius of 126 pm and a Van der Waals radius of 194 pm. Iron was discovered by humans before 5000 BC. In its elemental form, iron has a lustrous grayish metallic appearance. Iron is the fourth most common element in the Earth's crust and the most common element by mass forming the earth as a whole. Iron is rarely found as a free element, since it tends to oxidize easily; it is usually found in minerals such as magnetite, hematite, goethite, limonite, or siderite.Elemental Iron Though pure iron is typically soft, the addition of carbon creates the alloy known as steel, which is significantly stronger.


Phosphorus Bohr ModelSee more Phosphorus products. Phosphorus (atomic symbol: P, atomic number: 15) is a Block P, Group 15, Period 3 element. The number of electrons in each of Phosphorus's shells is 2, 8, 5 and its electronic configuration is [Ne] 3s2 3p3. The phosphorus atom has a radius of and its Van der Waals radius is Phosphorus is a highly-reactive non-metallic element (sometimes considered a metalloid) with two primary allotropes, white phosphorus and red phosphorus its black flaky appearance is similar to graphitic carbon. Compound forms of phosphorus include phosphates and phosphides. Phosphorous was first recognized as an element by Hennig Brand in 1669 its name (phosphorus mirabilis, or "bearer of light") was inspired from the brilliant glow emitted by its distillation.


June 28, 2022
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