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Sigma-Aldrich

Molybdic acid

≥85.0% MoO3 basis, ACS reagent

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100 G
$82.40
500 G
$317.60

About This Item

CAS Number:
EC Number:
MDL number:
UNSPSC Code:
12352300
PubChem Substance ID:
NACRES:
NB.24

$82.40

List Price$103.00Save 20%
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Available to ship onMay 01, 2025Details


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grade

ACS reagent

Quality Level

vapor density

6.2 (vs air)

assay

≥85.0% MoO3 basis

form

powder

reaction suitability

reagent type: catalyst
core: molybdenum

impurities

≤0.01% insol. dil. NH4OH

solubility

water: insoluble

density

3.1 g/mL at 25 °C (lit.)

anion traces

AsO43-, PO43- and SiO2: ≤0.001%
chloride (Cl-): ≤0.002%
phosphate (PO43-): ≤5 ppm
sulfate (SO42-): ≤0.2%

cation traces

heavy metals: ≤0.003%

SMILES string

O[Mo](O)(=O)=O

InChI

1S/Mo.2H2O.2O/h;2*1H2;;/q+2;;;;/p-2

InChI key

VLAPMBHFAWRUQP-UHFFFAOYSA-L

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General description

Molybdic acid is the hydrated form of molybdenum trioxide. It is used in the synthesis Froehde reagent.

Application

Molybdic acid can be used:
  • In the preparation of silica-supported molybdic acid catalyst for the synthesis of pyrano [2,3-c] chromene derivatives by condensation of aldehydes, malononitrile, and 4-hydroxycoumarin.
  • In the synthesis of Froehde reagent for the presumptive identification of alkaloids like opioids.
  • As a molybdenum source in the preparation of MoSe2.

Other Notes

Consists largely of an ammonium molybdate

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable


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Effect of high-temperature shock-wave compression on few-layer MoS2, WS2 and MoSe2.
Vasu K, et al.
Chemical Physics Letters, 582, 105-109 (2013)
Hybrid Fabric/Molybdic Acid Modified Phenolic Resin Composites with Improved Anti-wear Properties.
Yang M, et al.
Tribology Transactions (2015)
Made by molybdenum.
Lennartson A.
Nature Chemistry, 6(8), 746-746 (2014)

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

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    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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  2. How can I determine the shelf life / expiration / retest date of this product?

    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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