Sodium Phosphate Tribasic Dodecahydrate CAS 10101-89-0
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Name: Sodium Phosphate Tribasic Dodecahydrate
CAS: 10101-89-0
MOQ: 1KG
Directory Guidance on Sodium Phosphate Tribasic Dodecahydrate
Chemical Structure
Basic Info:
| Melting Point | 75 °C |
| Density | 1.62 g/mL at 25 °C |
| Bulk Density | 950kg/m3 |
| Storage Temp. | Store at +5°C to +30°C. |
Sodium Phosphate Tribasic Dodecahydrate Introduction:
The core information can be disassembled from its name: “Trisodium phosphate” indicates that its main body is composed of three sodium ions (Na⁺) and one phosphate ion (PO₄³⁻); and “dodecahydrate” clearly indicates that during the crystallization process, each trisodium phosphate molecule is tightly bound to twelve water molecules (H₂O).
In appearance, Sodium Phosphate Tribasic Dodecahydrate usually appears as colorless or white translucent blocks, flakes or granular crystals. It is odorless, but has a distinct alkaline taste. A key and practical physical property is its good water solubility. At room temperature (20°C), its solubility in water is extremely high, usually exceeding 100 grams/100 milliliters of water, and it can quickly form a strong alkaline clear solution.
From a chemical point of view, Sodium Phosphate Tribasic Dodecahydrate is a strong base weak acid salt, which will undergo a hydrolysis reaction in water, making the solution alkaline. This alkaline property is the basis of its many applications. For example, when it is dissolved in water, it can react with a variety of substances to generate corresponding phosphates or undergo neutralization reactions, which provides a chemical basis for its wide application in chemical production.
In terms of stability, Sodium Phosphate Tribasic Dodecahydrate is relatively stable in a dry and cool environment. However, the crystal water in its lattice is not unbreakable. When left in the air for a long time or exposed to a high temperature and dry environment, some water molecules may gradually be lost, resulting in weathering on the surface of the crystal (loss of gloss or whitening), and even partially converted into other hydrated forms or anhydrous substances, which may affect its physical properties and dissolution rate to a certain extent.
In terms of preparation, Sodium Phosphate Tribasic Dodecahydrate can be synthesized by a variety of methods. The most common one is the neutralization method, which is to react phosphoric acid with sodium hydroxide under certain conditions, and finally obtain the product after evaporation concentration, cooling crystallization and other steps. At the same time, it can also be prepared through other chemical routes such as double decomposition reaction. Different preparation methods will be selected according to factors such as actual production needs and raw material conditions.
Nature and Specifications:
| Item | Specification |
| Product Name | Sodium Phosphate Tribasic Dodecahydrate |
| CAS No. | 10101-89-0 |
| Appearance | Powder |
| Shelf Life | 2 years |
| Packing | As Your Requirements |
| Solubility | H2O: 0.5 M at 20 °C, clear, colorless |
| Form | Solid |
| Specific Gravity | 1.62 |
| Color | White |
Product service:
- Certificate Of Analysis (COA)
- Material Safety Data Sheet (MSDS)
- Route of synthesis (ROS)
- Method of Aanlysis (MOA)
- Nuclear Magnetic Resonance (NMR)
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The Application Situation Of Sodium Phosphate Tribasic Dodecahydrate
In the field of water treatment, Sodium Phosphate Tribasic Dodecahydrate is an important type of water softener and corrosion and scale inhibitor. Its phosphate ion (PO₄³⁻) can efficiently form stable water-soluble complexes (chelation) with metal ions such as calcium (Ca²⁺), magnesium (Mg²⁺), and iron (Fe²⁺/³⁺) that cause hardness, preventing them from forming hard scale such as calcium carbonate and calcium sulfate that are difficult to dissolve and deposit on the inner wall of the boiler, pipes, heat exchangers and related heating elements.
In the detergent and cleaning agent industry, Sodium Phosphate Tribasic Dodecahydrate has long occupied the position of core additives, especially in heavy-duty industrial detergents, washing powders and certain solid or liquid detergent formulations in hard water areas. Its value is reflected in multiple dimensions: it softens washing water, preventing hardness metal ions in the water from combining with soap or surfactants to form soap scum (scum), thereby greatly improving washing efficiency and preventing stains from forming on fabrics or cleaning surfaces;
In various processes in the textile industry, Sodium Phosphate Tribasic Dodecahydrate plays multiple functions. In the desizing and scouring (refining) stages of cotton fabrics, its strong alkalinity helps to decompose and remove natural impurities (such as pectin, wax, and some pigments) and sizing agents added during the textile process (such as starch and polyvinyl alcohol).
In the food processing industry (which needs to meet specific food-grade standards), Sodium Phosphate Tribasic Dodecahydrate is allowed to be used as a multifunctional food additive, mainly as an acidity regulator (alkaline agent), emulsifier and chelating agent.
The application of Sodium Phosphate Tribasic Dodecahydrate goes far beyond this. In the metallurgical industry, it is often used for metal surface treatment (such as degreasing, pre-cleaning before phosphating) and flotation processes. In the ceramic industry, it can be used as a mud degumming agent. In the manufacture of pigments and paints, it can improve the dispersion stability of pigments. In the rubber and plastics industries, it may be used as a stabilizer or additive component. Even in laboratory analytical chemistry, it is sometimes used as a component of a standard substance or buffer solution. It can be said that its depth and breadth of application demonstrate its cornerstone status as a basic chemical raw material.
The Advantages Of Sodium Phosphate Tribasic Dodecahydrate
In terms of economic benefits, Sodium Phosphate Tribasic Dodecahydrate has significant advantages. Although the price of phosphate raw materials may be affected by market fluctuations, its large-scale industrial production process has been mature, stable, and efficient for a long time, and the production cost per unit active ingredient is competitive.
As a single component, Sodium Phosphate Tribasic Dodecahydrate contributes multifunctional integrated effects, such as achieving soft water, providing alkalinity, dispersing dirt, etc. Compared with formulation systems that rely on multiple single-functional additives, it can often reduce the complexity of formulation design and achieve an excellent overall cost-effectiveness ratio while achieving equal or better performance. Especially in the treatment of high-hardness water or where efficient industrial cleaning is required, its performance and cost balance point is often better than some alternatives.
The convenience and operational adaptability of the product are the highlights of Sodium Phosphate Tribasic Dodecahydrate that cannot be ignored. Its standard dodecahydrate form is easy to store and transport in a solid state (moisture-proof should be noted), and the physical form (such as granules, flakes, powder) can be designed according to downstream usage habits and needs. At the application site, its water-soluble properties make addition, dilution and mixing operations simple and easy.
Sodium Phosphate Tribasic Dodecahydrate has good compatibility and synergy with many common chemicals (such as chlorine bleach, various anionic/nonionic surfactants, alkalis, etc.), and has wide compatibility, which greatly facilitates flexible use in complex formulation systems. Operators can easily master its usage, and the training and management costs are relatively low.
In terms of safety and compliance, the risks of Sodium Phosphate Tribasic Dodecahydrate are relatively controllable. It is not flammable and explosive, and is a low-toxic substance (needs to comply with toxicological regulations in specific areas). In the fields of industrial and food applications, there are corresponding quality standards and control requirements (such as industrial grade, food grade, and compliance with FDA, EFSA and other regulatory requirements).
As long as appropriate personal protection is carried out in accordance with the operating procedures and product safety data sheet (MSDS) (such as wearing protective glasses and gloves to avoid dust inhalation), the handling and operation process is highly safe. For food-grade applications, strict purity and impurity control standards (such as heavy metal, arsenic and other limits) ensure the safety bottom line of its use. Of course, the corrosiveness caused by Sodium Phosphate Tribasic Dodecahydrate alkalinity needs to be taken seriously during use (especially at high concentrations) and after use. Equipment protection.
From the perspective of environmental impact (especially the phosphorus emission issue that has attracted much attention in the washing field), Sodium Phosphate Tribasic Dodecahydrate also has certain technical response advantages. Although total phosphorus emissions need to be strictly controlled, in water treatment applications, it can effectively reduce the formation of hard scale such as insoluble calcium carbonate by forming complexes with hardness ions such as calcium and magnesium in water, thereby improving thermal efficiency and indirectly reducing energy consumption and carbon emissions.
In some large industrial water systems (such as cooling towers and boilers), the phosphorus-containing sludge or sediment formed can be effectively collected and treated centrally (such as chemical precipitation phosphorus removal, biological phosphorus removal or resource utilization) through physical methods (such as clarification, filtration, and sedimentation), reducing the direct discharge of dissolved phosphorus into the water body, and may have the advantage of centralized treatment compared to some highly soluble alternatives. Nevertheless, compliance with strict emission regulations, control of total use, and coordination with appropriate wastewater phosphorus removal facilities are necessary prerequisites for the use of this product in phosphorus-sensitive areas. In non-sensitive areas or industrial closed-loop treatment systems, its advantages are even more obvious.
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Related References:
Chemicalbook-Sodium Phosphate Tribasic Dodecahydrate
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