Bulk Disodium Phosphate Heptahydrate | 15,000-ton capacity | Zhishang Chemical
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Disodium Phosphate Heptahydrate CAS 7782-85-6
- Surfactant Appearance: powder
- Proportion: Minimum 99.0%
- Inventory: In stock
- Sample: In stock
- Zhishang Chemical: Supplier and manufacturer of Disodium Phosphate Heptahydrate CAS 7782-85-6
Basic Info of Disodium Phosphate Heptahydrate
| SODIUM PHOSPHATE, DIBASIC, HEPTAHYDRATE Chemical Properties |
| Melting point | 48 °C |
| density | 1.68 g/mL at 25 °C(lit.) |
| bulk density | 800kg/m3 |
| vapor density | 4.9 (vs air) |
| storage temp. | Store at +5°C to +30°C. |
| solubility | 154g/l |
| form | Solid |
| color | White |
| Specific Gravity | 1.7 |
| PH Range | 8.7 – 9.3 |
| PH | 8.7-9.3 (25℃, 5% in solution) |
| Water Solubility | Soluble in water and insoluble in ethanol. |
| Merck | 14,8659 |
| Major Application | pharmaceutical (small molecule) |
| Cosmetics Ingredients Functions | BUFFERING ANTICORROSIVE FRAGRANCE |
What is Disodium Phosphate Heptahydrate？
Technical Overview
Disodium Phosphate Heptahydrate (CAS 7782-85-6)
Disodium Phosphate Heptahydrate (CAS 7782-85-6), chemically structured as Na₂HPO₄ ⋅ 7H₂O with a molecular mass of 268.07, functions as a highly uniform mineral salt bridging the pharmaceutical, food processing, and biochemical research fields. Synthesis engineers track this 1.68 g/mL crystalline matrix primarily for its exceptional efficiency as a biological buffering agent, stabilizing critical environments tightly within the 7.0–9.0 pH range. A 1% aqueous dilution yields a baseline pH window of 8.7–9.3, dissolving cleanly into water up to approximately 154 g/L at room temperature. Because its crystalline framework is sensitive to thermal stress, the molecules shed their bound crystallization water at 100°C to yield the anhydrous form, before undergoing complete thermal decomposition into sodium pyrophosphate if pushed to 250°C.
The Thermal Transition Loop of Sodium Phosphate Salts
[Raw Disodium Phosphate Heptahydrate] ➔ [Warm, Dry Air Room Temp] ➔ [Efflorescence / Loss of 5 H2O]
➔ [Thermal Curing at 100°C] ➔ [Anhydrous Na2HPO4 Intermediate]
➔ [Extreme Heating at 250°C] ➔ [Sodium Pyrophosphate Matrix]
The workflow sequence above maps the exact structural behavior of this compound under varying thermal conditions. To safeguard your laboratory assays from baseline drift, our isolation processes enforce the following rigid parameters:
| Analytical Parameter | Checked Value Profile | Operational Benefit |
|---|---|---|
| Active Titration Purity | ≥ 98.00% (validated by ACS loops) | Prevents premature buffer degradation |
| Insoluble Matter Cap | ≤ 0.005% | Eliminates downstream processing filtration |
| Heavy Metals Ceiling | ≤ 0.001% (as Pb) | Complies with strict pharmaceutical monographs |
Versatile Fields of Use
1. Advanced Pharmaceutical & Biochemical Blends
Formulation teams utilize this high-purity salt as an essential buffering companion to maintain absolute physiological pH stability during the preparation of Phosphate-Buffered Saline (PBS) for tissue culture and cellular assays. Within medicinal compounding, it acts as a reliable sequestering agent and mild therapeutic laxative for treating hypophosphatemia.
2. Dairy & Food Processing Controls
Food chemists deploy our certified food-grade crystals as an indispensable emulsifier to prevent protein separation and oil pooling in processed cheese lines. It stabilizes the overall protein matrix in evaporated milk, delays premature coagulation in dairy pasteurization, and increases the condensing temperature threshold of premium ice cream blends to guarantee a flawless mouthfeel.
Product Packaging
Why Partner with Zhishang chemical？
1. Massive 15,000-Ton Output & Secured Spot Buffers
We shield your processing plant from sudden raw material shortages by maintaining a constant inventory buffer of standard 25kg multi-wall bags at our regional fulfillment hubs. Our production partners operate massive facilities backed by rigorous ISO9001 and ISO22000 manufacturing credentials, delivering a steady annual capacity exceeding 15,000 metric tons. This massive scale ensures you completely bypass market procurement bottlenecks. Whether your current manufacturing campaign requires a single 25kg trial bag or a full 1-ton bulk container drop, your freight leaves our loading dock within 48 hours.
2. Advanced Low-Impurity Crystallization Technology
Our technical division utilizes an advanced, multi-stage crystallization process that drops heavy metal and insoluble contaminants down to a strict maximum of 0.001% and 0.005% respectively. This technical advantage ensures an ultra-clean reaction output, locking purity levels up to a minimum of 98% across both ACS and food-grade runs. We monitor every fractionating loop to guarantee exact batch consistency across multi-year purchase contracts. Your quality assurance team receives an official, factory-direct Certificate of Analysis (COA) and complete MSDS documentation before the cargo arrives at your plant door.
FAQ
It comes down to hydration weight and localized blending limits. The heptahydrate incorporates seven bound water molecules within its crystal lattice (Na₂HPO₄ ⋅ 7H₂O, MW 268.07), whereas the anhydrous form carries zero water weight (Na₂HPO₄, MW 141.96). Because water makes up a large portion of the heptahydrate’s mass, its buffering capacity per gram is slightly lower than the anhydrous variant. However, the heptahydrate dissolves much faster and more uniformly in water, making it a preferred choice for rapid, non-caking solution preparation.
This mineral salt is highly vulnerable to efflorescence, meaning it easily sheds its water of crystallization when exposed to warm, dry air at room temperature, losing up to five water molecules and altering its analytical weight. Conversely, high humidity will trigger rapid moisture absorption, leading to severe clumping inside your mixing hoppers. To safeguard the complete shelf life, warehouse personnel must store the material inside hermetically sealed containers in a cool, dry, well-ventilated chemical facility completely isolated from ethanol.
Within food processing lines, the compound operates as a powerful chelating agent and pH stabilizer. It links directly with calcium ions embedded in dairy proteins, converting the tough calcium casein matrix into a smooth, easily melting sodium caseinate structure that prevents processed cheese from separating into oil and water during heating. Furthermore, it halts acid accumulation in condensed milk to block accidental protein coagulation during high-temperature sterilization.
We support diverse procurement tracks depending on your project phase: our standard MOQ starts at 25kg (one standard bag or drum) to accommodate initial laboratory screening and pilot-scale formulation trials. For warehouse spot items, we ship out within 1 to 2 business days. Large commercial contracts and tonnage freight orders (1 MT and above) clear our logistics grid, customs documentation loops, and export clearance certifications within 5 to 7 business days.
The Manager has Something to Say
If you want to buy Disodium Phosphate Heptahydrate, pls contact us to get a free quote.
This is William, CEO of Zhishang Chemical Co., Ltd.
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Disodium Phosphate Heptahydrate Supplier and Manufacturer
As a Disodium Phosphate Heptahydrate supplier and manufacturer with a strict standard product quality system certificate, Zhishang Chemical has long been providing the best Disodium Phosphate Heptahydrate raw materials to customers all over the world.
Over the years, relying on professional team experience and customer-centric team concept to meet customer needs in a timely manner, our company enjoys a high reputation in the world. At present, our company has served more than 6,000 customers and has established long-term cooperative relations with customers from many countries.
If you have a demand for Disodium Phosphate Heptahydrate and related products, please contact our service staff Zhishang Chemical – White directly, and we will provide you with high-quality products at the best price.
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