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Sigma-Aldrich

Ammonium molybdate tetrahydrate

ACS reagent, 99.98% trace metals basis

Synonym(s):

Ammonium heptamolybdate tetrahydrate, Molybdic acid ammonium salt tetrahydrate

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About This Item

Linear Formula:
(NH4)6Mo7O24 · 4H2O
CAS Number:
Molecular Weight:
1235.86
EC Number:
MDL number:
UNSPSC Code:
12161600
PubChem Substance ID:
NACRES:
NA.55
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grade

ACS reagent
for inorganic trace analysis

Quality Level

Agency

suitable for SM 5210

Assay

81.0-83.0% MoO3 basis
99.98% trace metals basis

form

powder

reaction suitability

reagent type: catalyst
core: molybdenum

impurities

≤0.005% insolubles

density

2.498 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤0.002%
nitrate (NO3-): passes test
phosphate (PO43-): ≤5 ppm
sulfate (SO42-): ≤0.02%

cation traces

Mg and allied cations: ≤0.01%
heavy metals: ≤0.001% (as lead)

SMILES string

N.N.N.N.N.N.O.O.O.O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O[Mo](O)(=O)=O.O[Mo](O)(=O)=O.O[Mo](O)(=O)=O

InChI

1S/7Mo.6H3N.10H2O.18O/h;;;;;;;6*1H3;10*1H2;;;;;;;;;;;;;;;;;;/q;;;;3*+2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/p-6

InChI key

FIXLYHHVMHXSCP-UHFFFAOYSA-H

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General description

Ammonium molybdate tetrahydrate (AMT) is a molybdenum salt. Study of its extraction from nickel-molybdenum (Ni–Mo) ore by direct hydrometallurgical method has been reported.[1] Its degradation by combustion to form elemental molybdenum powder using metallic reducers has been investigated.[2]

Application

Ammonium molybdate tetrahydrate may be used in the following processes:
  • As a precursor in the generation of calcium molybdate (CaMoO4) spherulites.[3]
  • Synthesis of porous carbon-supported molybdenum dioxide (MoO2).[4]
  • Preparation of Iodine-iodide-molybdate solution to determine glucose level by glucose oxidase method.[5]
  • Preparation of polymer bulk heterojunction solar cells.[6]
  • As a precursor in the synthesis of Mo-N-codoped TiO2 (titanium dioxide).[7]
  • Synthesis of MoBi2S5 (molybdenum bismuth sulphide) thin films.[8]
Applied in the ultrasonic synthesis of phase-pure praseodymium molybdate, Pr2Mo3O12.[9]
Reagent used for oxidation of sulfides to sulfonyls.[10]

Features and Benefits

Meets A.C.S. reagent specificatons.

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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In-situ preparation of porous carbon-supported molybdenum dioxide and its performance in the oxidative desulfurization of thiophene.
Zhuang L, et al.
J. Mater. Sci., 49(16), 5606-5616 (2014)
Organic photovoltaic devices incorporating a molybdenum oxide hole-extraction layer deposited by spray-coating from an ammonium molybdate tetrahydrate precursor.
Griffin J, et al.
Organic Electronics, 15(3), 692-700 (2014)
Enhanced visible light activity and mechanism of TiO2 codoped with molybdenum and nitrogen.
Cheng X, et al.
Materials Science and Engineering, B, 178(7), 425-430 (2013)
Tetrahedron, 62, 11592-11592 (2006)
Recovery and purification of molybdenum from Ni-Mo ore by direct air oxidation in alkaline solution.
Zhao Z, et al.
Hydrometallurgy, 103(1), 68-73 (2010)

Related Content

This page is intended to make it easier to find the consumables you need based on the analytical method you’re using. Methods included on this page come from the EPA, Standard Methods and ASTM.

This page is intended to make it easier to find the consumables you need based on the analytical method you’re using. Methods included on this page come from the EPA, Standard Methods and ASTM.

This page is intended to make it easier to find the consumables you need based on the analytical method you’re using. Methods included on this page come from the EPA, Standard Methods and ASTM.

This page is intended to make it easier to find the consumables you need based on the analytical method you’re using. Methods included on this page come from the EPA, Standard Methods and ASTM.

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    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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