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Ammonium heptamolybdate tetrahydrate

(ammonium molybdate) cryst. extra pure

Synonym(s):

Ammonium heptamolybdate tetrahydrate, Ammonium molybdate, Hexammonium heptamolybdate 4-hydrate

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About This Item

Linear Formula:
(NH4)6Mo7O24 · 4 H2O
CAS Number:
12054-85-2
Molecular Weight:
1235.86
MDL number:
MFCD00167059
UNSPSC Code:
12352302
EC Index Number:
234-722-4
NACRES:
NB.21
grade:
for analytical purposes
solubility:
400 g/L
Pricing and availability is not currently available.

grade

for analytical purposes

Quality Level

100

specific analyte(s)

phosphate

technique(s)

photometry: suitable

pH

5.3 (20 °C, 50 g/L in H2O)

mp

90 °C (Elimination of water of crystallisation)

solubility

400 g/L

density

2.498 g/cm3 at 20 °C

bulk density

800 kg/m3

storage temp.

2-30°C

SMILES string

[Mo].[N+H4].[O-2].O

InChI

1S/Mo.H3N.H2O.O/h;1H3;1H2;/q;;;-2/p+1

InChI key

XCOMAVCHADVANQ-UHFFFAOYSA-O

Related Categories

Application


  • Ammonium Heptamolybdate Tetrahydrate in Nano-Structured Alloys: This compound is used in the hydro-thermal synthesis of nano-structured molybdenum-iron intermetallic alloys at relatively low temperatures, showing potential for advanced material applications in technology and industrial sectors (El-Geassy et al., 2023).

  • Enhanced Photocatalysis: It is utilized in constructing Mo(2)C@MoO(x) heterostructures for enhanced Surface-enhanced Raman Scattering (SERS) applications, which is significant in the fields of sensing and environmental monitoring (Lai et al., 2022).

  • Environmental Monitoring: Its applications extend to environmental science, where it is used in trace-level sensing of phosphate in soils, contributing to the monitoring and management of agricultural pollutants (Lu et al., 2021).

  • Advancements in Catalysis: This compound plays a critical role in the synthesis of advanced catalytic materials for the deoxygenation of organic compounds, promoting more efficient chemical processes in industrial settings (Priecel et al., 2020).

Analysis Note

Assay (precipitative titration): 99.3 - 101.8 %
Identity: passes test
Insoluble substances: ≤ 0.005 %
Chloride (Cl): ≤ 0.002 %
Nitrate (NO₃): passes test
Phosphate (PO₄): ≤ 0.0005 %
Phosphate, Arsenate, Silicate (as PO₄): passes test
Sulfate (SO₄): ≤ 0.02 %
Heavy metals (as Pb): ≤ 0.001 %
K (Potassium): ≤ 0.005 %
Mg (Magnesium): ≤ 0.005 %
Na (Sodium): ≤ 0.005 %
Magnesium and alcali salts: ≤ 0.02 %

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Questions

1–2 of 2 Questions  

  1. 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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  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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