Plan a trial for your application
Iron-source premixes
Compare color and distribution at equal ferrous iron input. Keep retained samples of the blend.
Storage stability
Compare ferrous iron, total iron and moisture in sealed and simulated open-bag samples.
Purchase specifications and incoming inspection
Review these properties for the intended application grade. Example figures refer to the cited grade or source. Confirm the offered specification, packaging and lead time in the quotation. UK Food Standards Agency · Ferrous sulfate monohydrate feed entry ↗
| Property | Unit | Published or agreed specification | Test conditions and checks |
|---|---|---|---|
| Ferrous iron | % by mass | Confirm for the proposed grade and project | Specify Fe²⁺, total Fe or water-soluble Fe. Sample and test using the corresponding method. |
| Total iron | % by mass | Confirm for the proposed grade and project | Specify Fe²⁺, total Fe or water-soluble Fe. Sample and test using the corresponding method. |
| 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. |
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
Check iron oxidation state, hydrate and inner-bag seal. Assign separate item codes to different forms.
Storage and handling
Keep an unopened control. Retest damp or discoloured lots using the agreed method.
Sample and order lead times
State premix or pelleting trial size, replenishment quantity and receiving warehouse. Confirm MOQ, preparation time and plant arrival separately for samples, pallets and split orders.
Questions from the plant
How should a darker lot be assessed when total iron passes?
Measure ferrous fraction and review sampling, sealing and oxygen exposure before deciding on release.
Can a hydrate change affect feeding?
Convert on measured Fe²⁺ and add flow and moisture checks.
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 Ferrous iron, Total iron, Hydration state.
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.