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A deep-dive technical analysis of Fe(NO₃)₃·9H₂O crystal chemistry, molecular morphology, critical stability parameters, and manufacturing quality control metrics.
Iron Three Nitrate, systematically known as Ferric Nitrate Nonahydrate (IUPAC: Iron(III) nitrate nonahydrate; CAS Registry Number: 7782-61-8; EC No.: 233-899-5), is an inorganic coordination compound with the chemical formula Fe(NO₃)₃·9H₂O and a molecular weight of 404.00 g/mol. In its crystalline state, the compound exists as monoclinic pale-violet to light-purple crystals that exhibit pronounced deliquescent characteristics when exposed to ambient atmospheric conditions above 30% relative humidity.
The compound's low melting point of approximately 47.2°C (117°F) makes thermal handling critical during global transportation and warehousing. Above this threshold, it dissolves entirely in its own water of crystallization. Further calcination above 125°C initiates a multi-stage thermal decomposition releasing corrosive nitrogen dioxide (NO₂) fumes, leaving an active, high-surface-area hematite (α-Fe₂O₃) residual matrix. Consequently, industrial process engineers and sourcing managers require strictly audited moisture-barrier packaging and climate-controlled supply chains to prevent caking, liquefaction, and premature hydrolytic degradation.
In aqueous solutions, Iron Three Nitrate undergoes step-wise aquo-cation hydrolysis: [Fe(H₂O)₆]³⁺ + H₂O ⇌ [Fe(H₂O)₅(OH)]²⁺ + H₃O⁺. This native dissociation drives the solution pH down to 1.0–2.0 (5% aqueous solution at 20°C), making it a potent, self-stabilizing oxidizer and Lewis acid catalyst for metal etching and organic synthesis.
China's chemical manufacturers synthesize Iron Three Nitrate predominantly via the high-efficiency reaction of high-purity iron scrap or refined reduced iron powder with technical-grade nitric acid under controlled oxygenated conditions. Depending on the downstream process demands, three distinct industrial grades are separated and purified in modern Chinese chemical clusters:
| Analytical Parameter | Electronic / Semiconductor Grade | High-Purity Catalyst Grade | Industrial / Mordant Grade |
|---|---|---|---|
| Assay [Fe(NO₃)₃·9H₂O] | ≥ 99.5% | ≥ 99.0% | ≥ 98.0% |
| Chloride (Cl⁻) | ≤ 0.0005% (5 ppm) | ≤ 0.002% (20 ppm) | ≤ 0.01% (100 ppm) |
| Sulfate (SO₄²⁻) | ≤ 0.005% (50 ppm) | ≤ 0.01% (100 ppm) | ≤ 0.05% (500 ppm) |
| Insoluble Matter in H₂O | ≤ 0.002% | ≤ 0.005% | ≤ 0.02% |
| Copper (Cu) | ≤ 0.001% (10 ppm) | ≤ 0.005% (50 ppm) | ≤ 0.02% |
| Zinc (Zn) | ≤ 0.001% (10 ppm) | ≤ 0.005% (50 ppm) | ≤ 0.02% |
| Lead (Pb) & Heavy Metals | ≤ 0.0002% (2 ppm) | ≤ 0.001% (10 ppm) | ≤ 0.005% |
| pH (50 g/L solution @ 20°C) | 1.3 – 1.8 | 1.3 – 2.0 | 1.0 – 2.2 |
| Commercial Availability | In Stock / Pre-Order | Bulk Contract | Continuous Production |
Real-time insight into mill-direct FOB/CIF contract pricing benchmarks, tier-based quantity breaks, raw material correlation drivers, and container optimization.
FOB pricing closely tracks China's synthetic ammonia and concentrated nitric acid (68% HNO₃) indices, combined with high-grade metallurgical iron scrap market pricing. Fluctuations are updated on a bi-weekly basis for spot and long-term frame agreements.
As a classified UN 1466 Oxidizing Solid, sea freight calculations must factor in dangerous goods (DG) surcharges, specialized maritime container stowing away from combustible materials, and mandatory pre-shipment maritime declarations.
Scale economies in manufacturing hubs located across Shandong, Hebei, and Jiangsu allow Chinese producers to deliver 25–40% cost reductions over European and North American toll-manufacturers while maintaining full analytical traceability.
| Order Volume Tier | Assay Grade | Packaging Configuration | Indicative Price Range (FOB China Port) | Standard Production Lead Time |
|---|---|---|---|---|
| Sample / Evaluation (100–500 kg) | ≥ 99.0% Catalyst / Tech | 25 kg double-PE-lined fiber drums | $1,450 – $1,800 / MT | 3 – 5 business days |
| Spot LCL Order (1 – 5 MT) | ≥ 98.5% Industrial Grade | 25 kg laminated woven bags or drums | $1,100 – $1,350 / MT | 7 – 10 business days |
| Full Container Load (1 FCL = ~20 MT) | ≥ 98.0% Industrial / Mordant | Palletized, shrink-wrapped 25 kg bags | $850 – $1,050 / MT | 10 – 14 business days |
| Contract Procurement (>100 MT/yr) | ≥ 99.0% Tailored Spec | Custom 25 kg drums or 1,000 kg big bags | $720 – $920 / MT | Scheduled rolling delivery |
| Semiconductor Micro-Etch Grade | ≥ 99.5% Ultra-Low Metals | UN-rated hermetic drums with N₂ purge | $2,200 – $2,850 / MT | 14 – 20 business days |
How global chemical conglomerates, semiconductor fabricators, and metal treatment facilities integrate Iron Three Nitrate into critical continuous workflows.
Replaces aggressive hydrochloric or ferric chloride baths in precision copper and copper-alloy etching for printed circuit boards and lead frames. Ferric nitrate provides smooth undercut-free line geometries without emitting volatile chloride vapors.
Essential precursor in synthesizing iron-based catalysts for ammonia decomposition, Fischer-Tropsch hydrocarbon synthesis, and selective catalytic reduction (SCR) of nitrogen oxides in modern thermal power plants.
Acts as a superior coagulant and Fenton/photo-Fenton precursor for industrial wastewater. Rapidly precipitates toxic arsenates, phosphates, and sulfides while oxidizing refractory halogenated organic hydrocarbons.
Used extensively across commercial textile dyeing operations as an efficient, heavy-metal-compliant mordant for natural silks and cottons, locking color pigments and boosting ultraviolet color-fastness.
Navigating global chemical import regimes, maritime dangerous goods classifications, and stringent quality assurance protocols without operational delays.
Because of its chemical nature as a strong oxidizing agent, Iron Three Nitrate is strictly regulated for international intermodal transport under the United Nations Recommendations on the Transport of Dangerous Goods:
To eliminate the risk of atmospheric moisture absorption and container floor corrosion during extended ocean voyages across tropical zones, Chinese premier export manufacturers utilize certified UN-approved packaging: heavy-duty 25 kg fiber or composite plastic drums fitted with dual-layer hermetically heat-sealed poly liners, complemented by desiccant inserts and specialized shrink-wrap stabilization.
Every industrial shipment is accompanied by a full-traceability technical and regulatory dossier, enabling prompt customs clearance and smooth regulatory onboarding in Europe, North America, Southeast Asia, and Latin America:
Technological innovation, green synthesis paradigms, and the explosive demand from energy storage and advanced microelectronics sectors.
With energy storage surging, high-purity ferric nitrate is increasingly deployed as a superior iron source in hydrothermal synthesis for lithium iron phosphate (LiFePO₄) and sodium-ion battery active materials, offering ultra-uniform iron ion distribution without chloride contamination.
Leading Chinese plants have deployed closed-loop nitrogen oxide (NOx) catalytic scrubbing systems that regenerate recovered acid into the dissolution cycle, drastically curbing emissions and reducing Scope 1 and Scope 2 carbon footprints for overseas corporate buyers.
With sub-7nm semiconductor manufacturing demanding radical contaminant suppression, R&D teams are implementing multi-stage recrystallization to drive trace metallic impurities (Cu, Ni, Cr, Zn) down into single-digit parts-per-billion (ppb) regimes.
Clear, authoritative technical answers addressing common challenges faced by international procurement managers, quality auditors, and chemical logisticians.
Explore our expanded export portfolio produced across state-of-the-art Chinese synthesis centers, fully compliant with international technical standards.
