Dissolvine D-Fe-11 is a water-soluble iron DTPA chelate for greenhouse and commercial growing programs that require a separately measured iron source. The 25 kg package, approximately 55 lb, suits recurring nutrient preparation and larger fertilizer batches.

Iron Content & Product Identity

The supplied Dissolvine technical sheet specifies 11.6% iron by weight (116 grams per kilogram), supplied as iron sodium DTPA. D-Fe-11 is the product designation; use the analysis on the package or lot documentation when calculating additions. The 11% guarantee used on Custom Hydro repacks is a separate labeling basis.

Hydroponics & Soilless Fertigation

Use as the iron component of a complete, crop-specific nutrient program. The manufacturer reference describes continuous iron concentrations of approximately 0.8 ppm for vegetables such as tomatoes and cucumbers, and 1.4–2.0 ppm for flower crops such as roses, gerbera, and carnations. These are reference programs, not universal feeding rates. Account for iron already present in water and other fertilizers.

For measured additions, grams of product = desired additional iron in ppm × final US gallons × 3.7854 ÷ (10 × iron percentage). Use 11.6 for iron percentage only when supported by the package analysis. Dissolve separately before adding to the nutrient tank. Calibrate injectors and verify final dilution; never apply concentrated stock directly to roots.

Protect prepared solutions from light and use within one to two weeks. Check iron concentration after recirculation or disinfection and adjust from measured results. The reference recommends considering a suitable EDDHA-type iron source when root-zone pH rises to 7.5 or higher; do not compensate for unsuitable root-zone conditions simply by increasing iron.

Soil & Foliar Applications

The manufacturer reference recommends soil application below pH 7.5. Apply a properly diluted solution near the root zone using a rate selected from soil testing and qualified crop recommendations.

For foliar applications, select a crop- and cultivar-specific rate with a qualified advisor. Test the intended concentration and tank mixture on a small representative group of plants before general treatment. Avoid hot, sunny conditions and do not apply during bloom. Root-feeding concentrations are not foliar spray directions.

Mixing & Handling

Do not allow direct contact with concentrated acids. Check compatibility before mixing a full batch. The reference advises chelated zinc, manganese, and copper when these nutrients share a formulated stock tank with iron DTPA, but advises against copper- or zinc-based chemicals in foliar mixtures. These are different mixing contexts, not a guarantee of universal compatibility.

Keep dry product tightly closed in a cool, dry location away from children, animals, food, and feed. The supplied SDS warns that combustible dust concentrations may form in air. Avoid dust generation and accumulation; follow the SDS for protective equipment and handling.

Product Details

• Product: Dissolvine D-Fe-11
• Iron source: iron sodium DTPA
• Technical-sheet iron content: 11.6% by weight
• Net contents: 25 kg, approximately 55 lb
• Not a complete fertilizer

Historical Rexolin packaging photographs are retained for reference; they do not establish the packaging of a current shipment.

Documents

• Dissolvine D-Fe-11 technical and application sheet (PDF)
• Dissolvine D-Fe-11 Safety Data Sheet (PDF)
• Existing Rexolin iron DTPA specification reference (PDF)