Ammonium heptamolybdate

CAS Number
12027-67-7
EC Number
234-722-4
Abbreviation
AHM

What is Ammonium heptamolybdate?

Ammonium heptamolybdate (CAS 12027-67-7), abbreviated AHM, is an inorganic molybdenum salt; a primary source of soluble molybdenum for industrial and agricultural processes.

Where is Ammonium heptamolybdate used?

  • Agriculture: molybdenum-based micronutrient fertilizers and foliar sprays for leguminous crops where soil deficiency limits nitrogen fixation
  • Catalysts: precursor for hydrodesulfurization and selective oxidation catalysts in petroleum refining
  • Water treatment and industrial cooling: corrosion inhibitor forming a protective oxide layer on metal surfaces
  • Mining and metal processing: analytical reagent for phosphate and silicate determination in ore and process water testing
  • It serves as a catalyst precursor, corrosion inhibitor, and micronutrient source depending on the sector.

Commercial specifications

  • Purity typically 99% and upward
  • Bulk packaging for agricultural and industrial grades
  • Specifications aligned to customer process requirements and industrial standards

Other Names (Synonyms)

Molybdate (Mo7O246-), ammonium (1:6)|Molybdic acid (H6Mo7O24), hexaammonium salt|Ammonium molybdate(VI) ((NH4)6Mo7O24)|Molybdate (Mo7O246-), hexaammonium|Ammonium paramolybdate|Ammonium molybdate ((NH4)6Mo7O24)|AHM

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What are the physical properties of Ammonium heptamolybdate?

Melting Point 190°C
Density 2,498 g/cm 3
Appearance colourless to light green crystalline solid
Color Clear light colored
Form Liquid
Water Solubility Freely soluble in water.

Which trade and regulatory codes apply to Ammonium heptamolybdate?

HS Code 28417010
UN Number 3264
Storage Class 8B - Non-combustible corrosive hazardous materials
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