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A7302

Sigma-Aldrich

Ammonium molybdate tetrahydrate

ACS reagent, 81.0-83.0% MoO3 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:
12054-85-2
Molecular Weight:
1235.86
EC Number:
234-320-9
MDL number:
MFCD00167059
UNSPSC Code:
12352302
PubChem Substance ID:
329770925
NACRES:
NA.21

grade

ACS reagent

Quality Level

300

Agency

suitable for SM 5210

Assay

81.0-83.0% MoO3 basis

form

crystalline

reaction suitability

reagent type: catalyst
core: molybdenum

impurities

≤0.005% Insoluble matter

density

2.498 g/mL at 25 °C (lit.)

anion traces

arsenate, phosphate, and silicate (as SiO2): ≤0.001%
chloride (Cl-): ≤0.002%
nitrate (NO3-): passes test (limit about 0.003%)
phosphate (PO43-): ≤5 ppm
sulfate (SO42-): ≤0.02%

cation traces

Mg: ≤0.005%
heavy metals: ≤0.001% (as lead)

storage temp.

room temp

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, often employed in cryo-negative staining that helps to identify particles while preserving the material. As a catalyst, it is used to desulfurize thiophene and its derivatives.

Application

Ammonium molybdate tetrahydrate can be used as:
  • A molybdenum source in the synthesis of sodium molybdate dihydrate (Na2MoO4·2H2O).
  • A molybdenum source in the synthesis of nickel molybdate nanorods (NiMoO4) by co-precipitation method in the presence of nickel benzoate as a nickel source.
  • A precursor in the synthesis of Mn-MoS2 (MMS). MMS is employed in the production of MMS/rGO (reduced graphene oxide) composite that exhibits the highest rhodamine B (RhB) degradation efficiency.
  • A catalyst in the synthesis of PVDF (polyvinylidene fluoride) catalytic microcapsules. PVDF is a heterogeneous catalyst for the selective oxidation of benzyl alcohol to benzaldehyde.

Quality

May contain darkened ammonium molybdate crystals that are soluble in water.

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

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Suvarna Sounderajan et al.
Journal of hazardous materials, 149(1), 238-242 (2007-09-01)
Arsenic (V) is known to form heteropolyacid with ammonium molybdate in acidic aqueous solutions, which can be quantitatively extracted into certain organic solvents. In the present work, 12-molybdoarsenic acid extracted in butan-1-ol is used for quantification of As (V). Total
Shifeng Cao et al.
International journal of food microbiology, 141(3), 173-176 (2010-07-08)
The potential enhancement of Pichia membranifaciens by ammonium molybdate (NH(4)Mo) to control blue mould caused by Penicillium expansum on peach fruit was investigated. Combining P. membranifaciens at 1x10(8) cell/ml with 1 mM NH(4)Mo provided a more effective control of blue
Sidney Omelon et al.
Electrophoresis, 28(16), 2808-2811 (2007-07-21)
Nonradioactive polyphosphate (poly(P); (PO(3) (-))(n)) species resolved by PAGE can be detected by hydrolytic degradation of the polyphosphates into orthophosphates (P(i)) with a 5 M HCl solution saturated with NaCl, followed by staining the P(i) degradation products in a 1
Bernard Lorber et al.
Micron (Oxford, England : 1993), 39(4), 431-446 (2007-05-01)
The formation of 2D arrays of three small icosahedral RNA viruses with known 3D structures (tomato bushy stunt virus, turnip yellow mosaic virus and bromegrass mosaic virus) has been investigated to determine the role of each component of a negative
Kyung Ho Park et al.
Journal of hazardous materials, 138(2), 311-316 (2006-07-25)
The petroleum refining industry makes extensive use of hydroprocessing catalysts. These catalysts contain environmentally critical and economically valuable metals such as Mo, V, Ni and Co. In the present study, a simple hydrometallurgical processing of spent hydrodesulphurization (HDS) catalyst for
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