Product Name: Potassium Hexacyanoferrate(II) Trihydrate
Synonym: Potassium Ferrocyanide Trihydrate, Yellow Prussiate of Potash
CAS No.：14459‑95‑1
EC Number: 237‑722‑2
Molecular Formula: \(\boldsymbol{K_4[Fe(CN)_6]·3H_2O}\)
Molecular Weight: 422.39 g/mol
HS Code: 28372030
1. Physical‑Chemical Properties
Density: 1.85 g/cm³ (20℃)
Melting Point: 70 ℃ (loss crystal water)
Solubility in water: 211 g/L @20 ℃; freely soluble in water, insoluble in alcohol
Bulk Density: 950‑1050 kg/m³
Decomposition: Decompose under strong acid condition, release toxic HCN; stable under normal ambient conditions.
2. Typical Specifications (Industrial Grade)
| Item | Specification | Test Condition |
|---|---|---|
| Appearance | Pale yellow monoclinic crystal / crystalline powder | Visual @25℃ |
| Odor | Odourless | Organoleptic |
| Assay (K₄[Fe(CN)₆]·3H₂O) | ≥98.0 % | Titration |
| Water‑insoluble matter | ≤0.025 % | Gravimetric |
| Chloride (Cl⁻) | ≤0.05 % | Titration |
| Sulphate (SO₄²⁻) | ≤0.05 % | Turbidimetry |
| pH (211 g/L aqueous solution) | 8.0‑10.0 | 25℃ |
| Heavy Metals (Pb) | ≤0.002 % | AAS |
3. Applications
Pigment industry: Manufacture of Prussian blue / iron‑blue pigments
Food industry: Anti‑caking agent for salt (food grade only)
Metallurgy: Steel surface heat‑treatment, metal separation & purification
Analytical chemistry: Reagent for Fe³⁺ detection
Printing‑dyeing: Oxidation auxiliary agent
- Critical Reminder: Contact with strong acid will produce toxic hydrogen cyanide gas. Keep away from acid materials.
4. Storage & Shelf‑Life
Storage: Keep tightly sealed, cool, dry & ventilated warehouse; temperature 5‑30℃, avoid direct sunlight, isolate from acids & oxidants
Shelf‑life: 24 months under original unopened packaging
Packing: 25 kg woven bag with inner PE liner (standard export packing)
5. Handling Notes
Industrial raw‑material only. Food‑grade requires separate food‑safety certification.
Avoid dust inhalation, avoid eye & skin contact.
In case of contact, rinse with plenty running water.
Do not mix with acidic substances.
For full hazard, transport & classification information please refer to SDS document.
Disclaimer: All values are typical laboratory reference data, not legal contract specification. Customer shall verify performance in own process.
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