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Phosphotungstic Acid Hydrate

CAS #:

Linear Formula:

H3[P(W3O10)4] · xH2O

MDL Number:


EC No.:



(2N) 99% Phosphotungstic Acid Hydrate
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(3N) 99.9% Phosphotungstic Acid Hydrate
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(4N) 99.99% Phosphotungstic Acid Hydrate
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(5N) 99.999% Phosphotungstic Acid Hydrate
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Phosphotungstic Acid Hydrate Properties

Compound Formula


Molecular Weight



White Powder

Melting Point


Boiling Point




Exact Mass


Monoisotopic Mass

2899.216 g/mol

Phosphotungstic Acid Hydrate Health & Safety Information

Signal Word Danger
Hazard Statements H314
Hazard Codes C
Risk Codes 34
Safety Statements 26-36/37/39
RTECS Number N/A
Transport Information UN 3260 8 / PGII
WGK Germany 3

About Phosphotungstic Acid Hydrate

Phosphotungstic Acid Hydrate is generally immediately available in most volumes, including bulk orders. American Elements can produce materials to custom specifications by request, in addition to custom compositions for commercial and research applications and new proprietary technologies. American Elements also casts any of the rare earth metals and most other advanced materials into rod, bar or plate form, as well as numerous other machined shapes, nanomaterials, and in the form of solutions and organometallic compounds. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.

Phosphotungstic Acid Hydrate Synonyms

Tungstophosphoric acid hydrate, PTA, TPA, 12-Phosphotungstic acid hydrate, Dodecatungstophosphoric acid hydrate, 12-wolframophosphoric acid hydrate, Phosphotungstic acid n-hydrate, dodeca-tungstophosphoric acid hydrate

Phosphotungstic Acid Hydrate Chemical Identifiers

Linear Formula

H3[P(W3O10)4] · xH2O

Pubchem CID


MDL Number


EC No.


Beilstein Registry No.



phosphoric acid; trioxotungsten; hydrate



InchI Identifier


InchI Key


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

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 110.5.pm and its Van der Waals radius is 180.pm. 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.

See more Tungsten products. Tungsten (atomic symbol: W, atomic number: 74) is a Block D, Group 6, Period 6 element with an atomic weight of 183.84. The number of electrons in each of tungsten's shells is [2, 8, 18, 32, 12, 2] and its electron configuration is [Xe] 4f14 5d4 6s2. Tungsten Bohr ModelThe tungsten atom has a radius of 139 pm and a Van der Waals radius of 210 pm. Tungsten was discovered by Torbern Bergman in 1781 and first isolated by Juan José Elhuyar and Fausto Elhuyar in 1783. In its elemental form, tungsten has a grayish white, lustrous appearance. Elemental TungstenTungsten has the highest melting point of all the metallic elements and a density comparable to that or uranium or gold and about 1.7 times that of lead. Tungsten alloys are often used to make filaments and targets of x-ray tubes. It is found in the minerals scheelite (CaWO4) and wolframite [(Fe,Mn)WO4]. In reference to its density, Tungsten gets its name from the Swedish words tung and sten, meaning heavy stone.

Recent Research

Cs3W3PO13: A Tungsten Phosphate with One-Dimensional Zigzag Tunnels Exhibiting Strongly Anisotropic Thermal Expansion., Gong, Pifu, Jiang Xingxing, Yang Yi, Luo Siyang, Huang Rongjin, Li Laifeng, Chen Chuangtian, and Lin Zheshuai , Inorg Chem, 2016 May 16, (2016)

Influence of environmental factors on the phosphorus adsorption of lanthanum-modified bentonite in eutrophic water and sediment., Liu, SheJiang, Li Jie, Yang YongKui, Wang Juan, and Ding Hui , Environ Sci Pollut Res Int, 2016 Feb, Volume 23, Issue 3, p.2487-94, (2016)

Tungsten phosphide nanorod arrays directly grown on carbon cloth: a highly efficient and stable hydrogen evolution cathode at all pH values., Pu, Zonghua, Liu Qian, Asiri Abdullah M., and Sun Xuping , ACS Appl Mater Interfaces, 2014 Dec 24, Volume 6, Issue 24, p.21874-9, (2014)

Sensitive detection of alkaline phosphatase by switching on gold nanoclusters fluorescence quenched by pyridoxal phosphate., Halawa, Mohamed Ibrahim, Gao Wenyue, Saqib Muhammad, Kitte Shimeles Addisu, Wu Fengxia, and Xu Guobao , Biosens Bioelectron, 2017 Sep 15, Volume 95, p.8-14, (2017)

Iron doped β-Tricalcium phosphate: Synthesis, characterization, hyperthermia effect, biocompatibility and mechanical evaluation., Singh, Ram Kishore, Srivastava M, Prasad N K., Awasthi Sharad, Dhayalan Arunkumar, and Kannan S , Mater Sci Eng C Mater Biol Appl, 2017 Sep 01, Volume 78, p.715-726, (2017)

Using reduced graphene oxide-Ca:CdSe nanocomposite to enhance photoelectrochemical activity of gold nanoparticles functionalized tungsten oxide for highly sensitive prostate specific antigen detection., Wang, Xueping, Xu Rui, Sun Xu, Wang Yaoguang, Ren Xiang, Du Bin, Wu Dan, and Wei Qin , Biosens Bioelectron, 2017 Oct 15, Volume 96, p.239-245, (2017)

Controllable continuous sub-tenon drug delivery of dexamethasone disodium phosphate to ocular posterior segment in rabbit., Huang, Xuetao, Liu Shaogang, Yang Yezhen, Duan Yiqin, and Lin Ding , Drug Deliv, 2017 Nov, Volume 24, Issue 1, p.452-458, (2017)

Ten Good Reasons for the Use of the Tellurium-Centered Anderson-Evans Polyoxotungstate in Protein Crystallography., Bijelic, Aleksandar, and Rompel Annette , Acc Chem Res, 2017 May 31, (2017)

A temperature-resolved assembly of a series of the largest scandium-containing polyoxotungstates., Cai, Zhen-Wen, Yang Tao, Qi Yan-Jie, Li Xin-Xiong, and Zheng Shou-Tian , Dalton Trans, 2017 May 30, Volume 46, Issue 21, p.6848-6852, (2017)


June 24, 2017
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