ferrous sulfate heptahydrate

Ferrous Sulfate Heptahydrate (CAS 7782-63-0) is a high-purity ( $\ge 98\%$ ), free-flowing blue-green crystalline salt delivering $\ge 19.8\%$ bioavailable elemental iron ( $\text{Fe}^{2+}$ ).

Core Functions: Primary coagulant, Fenton oxidation catalyst, hexavalent chromium ( $\text{Cr}^{VI}$ ) reducer, and crop/feed iron supplement.
Key Specs: $\text{pH } 3.0\text{--}4.0$ (5% soln) | Water Solubility: $29.5 \text{ g}/100 \text{ mL}$ ( $20^\circ\text{C}$ ) | Insolubles $\le 0.05\%$ .
Applications: Wastewater phosphorus/ $\text{H}_2\text{S}$ removal, cement chromate reduction, soil chlorosis treatment, and feed additives.
Packaging & Compliance: Available in 25kg PE bags & 1,000kg FIBC bulk bags. ISO 9001:2015, REACH, and FAMI-QS compliant.

Category: Mining Chemicals

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Ferrous Sulfate Heptahydrate (CAS 7782-63-0)

High-purity industrial, water treatment, agricultural, and feed-grade Ferrous Sulfate Heptahydrate ( $\text{FeSO}_4 \cdot 7\text{H}_2\text{O}$ ). High-efficiency coagulant, chemical reducer, Fenton catalyst, and bioavailable iron supplement.

Core Specifications

Assay: $\ge 98.0\% \text{ FeSO}_4 \cdot 7\text{H}_2\text{O}$ | Elemental Fe: $\ge 19.8\%$
Form: Free-flowing blue-green crystals | Solubility: $29.5 \text{ g}/100 \text{ mL}$ ( $20^\circ\text{C}$ )
pH (5% soln): 3.0–4.0 | Bulk Density: $1.89 \text{ g/cm}^3$
Identifiers: CAS 7782-63-0 | EC 231-753-5

Parameter	Standard	Method
Insolubles	$\le 0.05\%$	Gravimetric
Lead (Pb)	$\le 10\text{ ppm}$	ICP-MS
Arsenic (As)	$\le 2\text{ ppm}$	HG-AAS
Cadmium / Mercury	$\le 2\text{ ppm}$ / $\le 0.1\text{ ppm}$	ICP-MS / CVAAS

Key Applications & Standard Dosing

Wastewater Treatment (50–250 mg/L): Soluble $\text{Fe}^{2+}$ oxidizes to $\text{Fe}^{3+}$ , forming $\text{Fe(OH)}_3$ flocs to destabilize colloids, precipitate orthophosphates, and remove $\text{H}_2\text{S}$ odor liabilities via $\text{FeS}$ precipitation.
Fenton Catalyst ( $1:3 \text{ to } 1:10 \text{ Fe}^{2+}:\text{H}_2\text{O}_2$ ): Drives AOP at $\text{pH } 2.8\text{--}3.2$ to generate non-selective hydroxyl radicals ( $\bullet\text{OH}$ ) for COD/TOC reduction:

$\text{Fe}^{2+} + \text{H}_2\text{O}_2 \rightarrow \text{Fe}^{3+} + \bullet\text{OH} + \text{OH}^-$
Chromate Reduction (0.1–0.5% w/w): Reduces hexavalent chromium ( $\text{Cr}^{VI}$ ) to trivalent $\text{Cr}^{III}$ in wet cement and industrial effluents.
Agriculture & Feed (200–500 kg/ha): Treats soil iron chlorosis, lowers rhizospheric pH, and prevents livestock anemia (FAMI-QS compliant).

Packaging, Storage & EHS

Packaging: 25kg PE-lined bags, 50kg PP bags, or 1000kg FIBC big bags.
Storage: Store below $30^\circ\text{C}$ and $<60\%$ RH away from oxidizers. Protect from efflorescence and oxidation.
Safety & Compliance: GHS Cat 4 Acute Tox (H302), Skin Irrit. 2 (H315), Eye Irrit. 2A (H319). ISO 9001:2015 manufactured; REACH registered. Non-hazardous transport (UN 3077 applies for bulk RQ $>1000\text{ lbs}$ ).