Ferrous Sulfate Granules

Chinese Name: Ferrous Sulfate

Chinese Synonyms: Green Vitriol, Iron Vitriol

pH: 3

CAS No.: 7782-63-0

Molecular Formula: FeSO₄·7H₂O

English Name: Ferrous Sulfate

Melting Point (℃): 64 (loses 3 molecules of crystal water)

Relative Density (water=1): 1.897 (15℃)

Solubility: Soluble in water and glycerol, insoluble in ethanol.

Symptoms of Iron Deficiency:
Young leaves show chlorosis while old leaves remain normal.
Leaf mesophyll turns yellow but veins stay green, showing netted venation.
In severe cases, the whole leaf withers, turns white, or falls off.
Fruit trees and ornamental plants on calcareous soils in northern regions are prone to chlorosis.

Dosage:
(1) Foliar spray: Dilute with water at 800–1200 times, spray evenly on leaves, apply 2–3 times at intervals of 7–10 days.
(2) Soil basal or topdressing: 1000–3000 g per mu for general crops, applied mixed with organic fertilizer.
(3) Injection method: For fruit trees, use 10 mL of 0.1% ferrous sulfate solution (1000‑fold dilution). Insert the needle into the trunk, hang the infusion bottle on the tree for slow absorption. This method acts quickly, with visible effects in 3 days.
(4) Direct soil application may lead to inactivation by conversion to high‑valent iron compounds. Therefore, mixing ferrous sulfate with 10–20 times organic fertilizer as basal fertilizer gives better results. Foliar application of 0.2%–0.5% aqueous solution is more effective than soil application. The safe concentration of ferrous sulfate is 0.2%–0.3%.

Application: Agricultural Grade
Adjusts soil pH, promotes chlorophyll formation (also known as iron fertilizer), prevents chlorosis in flowers and trees caused by iron deficiency. Essential for acid‑loving plants, especially cycads.
Used as agricultural pesticide to control wheat smut, apple and pear scab, and fruit tree canker; also used as fertilizer to remove moss and lichen from tree trunks.

Packaging, Storage and Transportation: Woven bag with plastic inner liner. Net weight: 25kg, 50kg, 1000kg, 1250kg or as per customer requirements. Store in dry warehouse, away from fire and heat sources. Cover during transportation to avoid sun exposure, rain and moisture.