Plan a trial for your application
Molybdenum stock solutions
Prepare samples using the exact salt form. Compare clarity and standing stability in the actual water.
Changing formulation sources
Compare with sodium molybdate at equal Mo. Calculate differences in ammoniacal nitrogen or sodium contribution.
Purchase specifications and incoming inspection
Use these properties to compare grades within the product family. Example figures refer to the cited grade or source. Confirm the offered specification, packaging and lead time in the quotation. University of Delaware Cooperative Extension · Chemical sources of micronutrient fertilizers ↗
| Property | Unit | Published or agreed specification | Test conditions and checks |
|---|---|---|---|
| Elemental molybdenum | % by mass | Confirm for the proposed grade and project | Report as elemental Mo. Verify molybdate identity and water of crystallisation. |
| Salt and hydration state | Identity and moisture (%) | Confirm for the proposed grade and project | Specify the precise hydrate and analytical basis. Apply limits for the relevant salt form only. |
| Water-insoluble matter | % by mass | Confirm for the proposed grade and project | Agree water temperature, sample-to-water ratio, filter medium and the drying and weighing procedure. Test compatibility separately with site water. |
When approving a sample, record the grade, methods, limits and specification revision. On receipt, match the packing lot number to the lot-specific COA and record the measured values and release decision.
From samples to commercial delivery
Packaging and receiving
Specify ammonium salt form, Mo content and lot on both labels. Select smaller packs for trace dosing if required.
Storage and handling
Keep sealed, dry and separately identified. Retain an unopened sample for trace-element checks.
Sample and order lead times
State trial use, application season and latest warehouse receipt. Confirm MOQ, dispatch point and expected arrival for samples, initial orders and peak-season replenishment.
Questions from the plant
Can one formula describe all ammonium molybdates?
Request the exact salt, such as ammonium orthomolybdate or heptamolybdate, and its hydrate form. Then use the corresponding formula.
What if the batch addition falls below the reliable weighing range?
Use a validated predilution or stock-solution metering procedure. Check uniformity and verify the weighing range.
Report a delivery or batch issue
Include the order number, lot number from the package, label photos and inspection records for the affected lot. When retesting, check Elemental molybdenum, Salt and hydration state, Water-insoluble matter.
Request documents for your application
TDS · Technical data sheet
For grade selection and sample approval, specify the grade and revision required.
SDS · Safety data sheet
Specify the country or region of use and the required language.
COA · Certificate of analysis
Request a sample COA during supplier review. For incoming inspection, provide the actual lot number.