Sodium ferrocyanide, chemically known as tetrasodium hexacyanoferrate(II) and identified by CAS number 13601-19-9, is a fascinating inorganic compound with a distinct set of chemical properties. At NINGBO INNO PHARMCHEM CO.,LTD., we recognize the importance of understanding these fundamental aspects for its effective and safe application across various industries.

The compound's chemical formula is Na₄[Fe(CN)₆]·10H₂O for its decahydrate form, which is the most common commercial product. It presents as pale yellow crystalline solids, often described as monoclinic crystals. A key characteristic is its solubility: readily soluble in water but insoluble in alcohol. This solubility profile dictates its behavior in different formulations and processes.

The stability of sodium ferrocyanide is noteworthy. The ferrocyanide complex, [Fe(CN)₆]⁴⁻, is remarkably stable due to the strong ligand field of the cyanide ions coordinating with the central iron(II) ion. This strong bonding is the reason behind its low toxicity compared to simple cyanide salts. While the presence of cyanide is in its name, the ferrocyanide ion itself does not readily release free cyanide ions. However, it's important to note that under specific harsh conditions, such as heating with strong acids, decomposition can occur, potentially releasing toxic hydrogen cyanide gas. This is a critical consideration in handling and storage, as emphasized in safety data sheets and regulatory guidelines concerning sodium ferrocyanide industrial applications.

The synthesis of sodium ferrocyanide typically involves reacting ferrous sulfate with sodium cyanide in an aqueous solution, often with heating. The chemical equation for this reaction is: 6NaCN + FeSO₄ → Na₄[Fe(CN)₆] + Na₂SO₄. Following this reaction, crystallization processes yield the decahydrate form. Alternative methods might involve reactions with calcium ferrocyanide and sodium carbonate. Understanding the sodium ferrocyanide manufacturing process ensures the production of a high-purity compound suitable for its intended uses, whether as a food additive or for more technical applications.

At NINGBO INNO PHARMCHEM CO.,LTD., we are dedicated to supplying sodium ferrocyanide that adheres to the highest purity standards. Our commitment extends to providing comprehensive information, including insights into sodium ferrocyanide cyanide toxicity and safety protocols, ensuring our clients can utilize this versatile chemical with confidence. Whether for preventing caking in food products or serving critical roles in photography and metallurgy, the chemical integrity of sodium ferrocyanide is paramount.