Plan a trial for your application
Iron sources for nutrient solutions
Record water alkalinity, pH and storage time. Compare clarity and retention of soluble iron.
Changing chelating agents
Compare against DTPA or EDDHA grades at equal iron and the actual pH.
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. Nouryon Dissolvine · EDTA-chelated fertilizer grades and applications ↗
| Property | Unit | Published or agreed specification | Test conditions and checks |
|---|---|---|---|
| Water-soluble 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. |
| Chelated iron | % by mass or % of element chelated | Confirm for the proposed grade and project | State whether the denominator is total product or water-soluble metal. Identify the ligand and selective analytical method. |
| Effective pH range | pH range | Confirm for the proposed grade and project | Request use information for the specific grade and verify against actual water hardness and stock solution concentration. |
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
State Fe-EDTA, iron basis and form on the label. Confirm packaging for powder or solution.
Storage and handling
Follow grade-specific storage and light conditions. Record stock-solution holding time after opening.
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 an iron chelate with a ligand other than EDTA use the same pH range?
Request the documented stability range for each chelant and test in the intended water.
Does adequate total iron remove the need for a chelated-fraction result?
Check the basis and lot report separately for total, water-soluble and chelated iron.
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 Water-soluble iron, Chelated iron, Effective pH range.
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.