Plan a trial for your application
Ferrous iron beverages
Track iron oxidation state and appearance under actual packaging and oxygen exposure.
Oxidation of stored powders
Compare sealed retained samples with samples opened repeatedly on the plant’s schedule. Record iron state and color difference.
Purchase specifications and incoming inspection
Include the intended grade or current specification in the enquiry. Use the table to compare selection criteria and inspection conditions. The specification agreed by both parties defines the contractual limits. ENVO · Ferrous Gluconate product information ↗
| Property | Unit | Published or agreed specification | Test conditions and checks |
|---|---|---|---|
| Ferrous and total iron | mg/g | Request both measurements separately. | Record sampling, dissolution and analysis times to aid interpretation of iron speciation. |
| Moisture | % by mass | Agree for the specific grade | Specify the water test, sampling and sealing conditions. Interpret water content and loss on drying separately. |
| Color stability | Color difference or color value | Agree the comparison conditions with the retained sample. | Use the actual contact medium, packaging and thermal history to distinguish inherent colour from changes during processing. |
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
ENVO lists 25 kg composite or paper bags. Confirm net weight, units per pallet and label revision.
Storage and handling
Require comparable moisture protection for trial and commercial material. Record opening time and exposure.
Sample and order lead times
State food category, sales market, pilot quantity and required arrival date. Confirm MOQ, batch documents, availability and remaining shelf life separately for samples and commercial orders.
The example label identifies ferrous gluconate. Match the bag lot to the iron assay and manufacture date.
Questions from the plant
Why does an acceptable fresh sample darken in storage?
Track iron speciation and appearance in the actual packaging under representative oxygen exposure.
Does normal total iron explain the colour?
Review the ferrous fraction, oxygen exposure and formulation acidity together. Retain both neat powder and finished-product samples.
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 assay, oxidized impurities, Moisture.
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.