Disodium Phosphate Dodecahydrate (CAS 10039-32-4) is an inorganic salt with a fascinating chemical profile that dictates its widespread utility. Understanding its core chemical properties is essential for appreciating its diverse applications. NINGBO INNO PHARMCHEM CO.,LTD. provides this compound, built on a foundation of sound chemical principles. The intrinsic chemical properties of disodium phosphate are key to its functionality in various industries.

Chemically, Disodium Phosphate is a dibasic salt of phosphoric acid, with the formula Na2HPO4. The dodecahydrate form, Na2HPO4·12H2O, signifies that each molecule of the salt is associated with twelve molecules of water. This hydration significantly influences its physical state, appearing as white crystalline powder. The anhydrous form, while also a powder, is hygroscopic, readily absorbing moisture from the air.

The solubility of Disodium Phosphate Dodecahydrate in water is a key characteristic. It dissolves readily in water, forming slightly alkaline solutions. The dissociation of the hydrogen phosphate ion (HPO4^2-) in water leads to the release of hydroxide ions (OH-), resulting in a pH typically between 8.0 and 11.0. This makes it a useful buffering agent, capable of resisting changes in pH when small amounts of acid or base are added. This buffering capacity is vital in applications requiring stable pH conditions, such as in certain food products and chemical reactions.

The production of Disodium Phosphate industrially often involves the neutralization of phosphoric acid with sodium hydroxide or sodium carbonate. A common industrial route includes treating dicalcium phosphate with sodium bisulfate, followed by partial neutralization of the resulting monosodium phosphate. The precise control of these chemical reactions ensures the purity and desired hydration state of the final product. For companies interested in the manufacturing of disodium phosphate, understanding these processes is crucial.

A notable chemical reaction of Disodium Phosphate is its thermal decomposition. When heated, it can transform into pyrophosphates, such as tetrasodium pyrophosphate (Na4P2O7), with the elimination of water. This transformation is utilized in certain industrial applications where the properties of pyrophosphates are desired. The reaction can be represented as: 2 Na2HPO4 → Na4P2O7 + H2O.

The interaction of Disodium Phosphate with other substances is also important. For instance, in the presence of calcium ions, it can form insoluble calcium phosphates, a property that is relevant in water treatment and biological systems. The ability to engage in these specific chemical interactions underpins its diverse functionalities.

In summary, the chemical nature of Disodium Phosphate Dodecahydrate is defined by its salt structure, hydration, solubility, and pH buffering capabilities. These inherent chemical properties, coupled with its production methods and reactivity, make it an indispensable compound for a multitude of applications. Reliable disodium phosphate suppliers like NINGBO INNO PHARMCHEM CO.,LTD. ensure that these fundamental chemical principles are harnessed effectively in the products they deliver.