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A7302

Sigma-Aldrich

Ammonium molybdate tetrahydrate

ACS reagent, 81.0-83.0% MoO3 basis

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Synonym(s):
Ammonium heptamolybdate tetrahydrate, Molybdic acid ammonium salt tetrahydrate
Linear Formula:
(NH4)6Mo7O24 · 4H2O
CAS Number:
Molecular Weight:
1235.86
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent

Quality Level

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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This Item
M101943134609878
vibrant-m

A7302

Ammonium molybdate tetrahydrate

-
vibrant-m

M1019

Ammonium molybdate tetrahydrate

Essential+ Grade
vibrant-m

431346

Ammonium molybdate tetrahydrate

Essential Grade
vibrant-m

09878

Ammonium molybdate tetrahydrate

Premium Grade
assay

81.0-83.0% MoO3 basis

assay

81.0-83.0% MoO3 basis

assay

81.0-83.0% MoO3 basis, 99.98% trace metals basis

assay

≥99.0% (T)

Quality Level

300

Quality Level

200

Quality Level

100

Quality Level

200

grade

ACS reagent

grade

-

grade

ACS reagent, for inorganic trace analysis

grade

-

impurities

≤0.005% Insoluble matter

impurities

-

impurities

≤0.005% insolubles

impurities

insoluble matter, passes filter test

density

2.498 g/mL at 25 °C (lit.)

density

2.498 g/mL at 25 °C (lit.)

density

2.498 g/mL at 25 °C (lit.)

density

2.498 g/mL at 25 °C (lit.)

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

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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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
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Pradeep Verma et al.
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Pretreatments for enzymatic saccharification are crucial for the establishment of lignocellulosic biorefineries. In this study, we focused on ammonium ions and peroxometal complexes as potential delignifying agents. We first examined the pretreatment of beech wood with nine different ammonium salts
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Protocols

To measure glucose-6-phosphatase activity, the Taussky-Shorr method is used. This method is a spectrophotometric stop-rate determination assay that is measured at 660 nm.

To measure 5′-nucleotidase activity, this procedure uses adenosine 5’-monophosphate and a color reagent to create a standard curve for determining the micromoles of phosphorus liberated.

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