Disodium Phosphate Heptahydrate Raw Material | CAS 7782-85-6 Wholesale
Product Introduction of Disodium Phosphate Heptahydrate
For industrial procurement managers and cell culture process engineers, purchasing a bulk hydrous phosphate buffer requires evaluating critical quality indicators far beyond the baseline price per metric ton. When utilizing a crystalline salt as a biological buffering agent or a downstream processing additive, hydration stability (preventing efflorescence) and ultra-low heavy metal thresholds (measured via ICP-MS) dictate batch consistency.
Sourcing from unverified, low-tier chemical brokers often introduces material that has partially lost its water of crystallization due to poor climate control during storage. This shifts the molecular weight, disrupts molarity calculations in your automated blending tanks, or introduces unacceptable trace iron and arsenic levels that can kill sensitive microbial cultures or alter food-stabilization properties.
Our Disodium Phosphate Heptahydrate (Sodium Phosphate Dibasic Heptahydrate, CAS 7782-85-6) is manufactured using a high-precision crystallization process under strict relative humidity controls. We guarantee a highly stable 7-hydrate crystalline form (typically 98.0%–102.0% assay purity matching ACS or USP specifications) and exceptionally low trace mineral profiles. This ensures excellent batch-to-batch consistency, rapid dissolution rates, and predictable pH performance in your production facility.
Standard Technical Data Sheet
Nature
Nature
- Chemical Name: Disodium Phosphate Heptahydrate; Disodium Hydrogen Phosphate Heptahydrate
- CAS Number: 7782-85-6
- EINECS Number: 616-512-8
- Molecular Formula: H6NaO5P
- Molecular Weight: 140.01 g/mol
- Assay (Purity): 98.0% – 102.0% (Conforms to ACS, USP, or EP monographs depending on grade)
- Appearance: White, granular or crystalline powder; mildly efflorescent in dry air
- pH of a 5% Solution (at 25°C): 8.7 – 9.3
- Heavy Metals (as Pb): ≤ 5 ppm (Ultra-pure biotech grades available at ≤ 1 ppm)
- Insoluble Matter: ≤ 0.005%
- Packaging Configurations: 25kg multi-layer moisture-barrier PE-lined paper bags, 1,000kg super sacks, or custom containerized loads for large-scale industrial manufacturing plants.
Application of Dissolve Phosphate Heptahydrate
1. Biological Buffering & Cell Culture Media Preparation
In the biotechnology and pharmaceutical sectors, maintaining a precise pH window is critical for cell viability and protein stability. Disodium Phosphate Heptahydrate is an essential component of Phosphate-Buffered Saline (PBS) and specialized downstream purification systems. Its 7-water crystalline structure dissolves more smoothly and generates less localized heat of solution than its anhydrous counterpart, preventing localized denaturation of sensitive biological molecules during large-scale buffer preparation.
2. Food Processing, Emulsification & Dairy Stabilization
The food industry utilizes food-grade (FCC) disodium phosphate heptahydrate as a highly effective emulsifier, texturizer, and pH buffering agent. In condensed milk, processed cheeses, and powdered creamer formulations, it interacts with milk proteins to prevent fat separation and gelation during thermal processing. Sourcing teams rely on our strict quality controls to ensure total compliance with international food additive codes (such as FDA and EFSA regulations).
3. Industrial Water Treatment & Metal Surface Finishing
In water treatment and industrial boiler systems, this hydrous sodium phosphate serves as a reliable scale inhibitor and corrosion preventer. It precipitates calcium and magnesium ions into a soft, non-adherent sludge that can be easily blown down, protecting high-pressure piping from mineral encrustation. Additionally, it is used in phosphating baths to prepare metal surfaces for industrial painting, enhancing long-term coating adhesion.
Related Questions:
Q1: Why choose Disodium Phosphate Heptahydrate over the Anhydrous form?
A: The main operational advantage is dissolution performance. Anhydrous disodium phosphate can form hard, stubborn agglomerates when exposed to water, slowing down dissolution times and generating localized heat. The heptahydrate form features bound water within its crystal lattice, allowing it to break apart quickly and dissolve smoothly in cold or room-temperature water without clumping, which reduces industrial mixing cycle times.
Q2: Does your Disodium Phosphate Heptahydrate hold Kosher and Halal certifications?
A: Yes. Our food-grade and pharmaceutical-grade manufacturing blocks utilize zero animal-derived components or processing aids. The production facility is fully audited and certified by major international Kosher and Halal regulatory boards, making it entirely compliant with clean-label consumer brand requirements.
Q3: What is your standard lead time and sample policy for factory validation?
A: We provide standard 250g to 500g technical evaluation samples packed in airtight, moisture-proof containers for lab bench-testing. For bulk commercial contracts, standard spot stock can be dispatched from our port warehouses within 5 to 7 business days, and we support structured safety-stock agreements to protect your production line from sudden market supply shocks.
Auditing Our Supply Chain: Why Factory Sourcing Teams Prefer Us
Global manufacturing schedules depend on rigid supply chain continuity and predictable raw material behavior. We protect your plant’s production timeline by operating as an audited, fully compliant manufacturing partner.
♦ Rigid Climate-Controlled Warehousing: To prevent the heptahydrate crystal from losing its bound water (efflorescence) or clumping under heat, our logistics centers enforce strict temperature and humidity standards, delivering a free-flowing granular material every time.
♦ Continuous Batch Traceability: Every delivery is backed by a lot-specific Certificate of Analysis (COA) verifying purity percentages, exact hydration state, and trace metal metrics, along with an up-to-date MSDS / SDS for hassle-free customs clearance.
♦ Stable Wholesale Pricing Models: Eliminate trading company markups. We provide highly competitive wholesale Disodium Phosphate Heptahydrate pricing structures with volume-based tier discounts designed to optimize your raw material margins.
♦ Multi-Layer Moisture-Barrier Packaging: Given the humidity-sensitive nature of hydrous salts, our bags utilize an advanced high-barrier inner liner, ensuring your material arrives in pristine condition whether shipped via sea, air, or rail.
Manufacturer of Disodium Phosphate Heptahydrate
Achievements
Service
Advice on Shipping
Achievements
Zhishang New Materials is based in Shandong, serves the whole country, faces the world, and is determined to become an excellent supplier and service provider in the chemical industry.
As a top manufacturer of cosmetic raw materials, disinfectants, flavors and fragrances in China, we are committed to producing high-quality products and have won high praise from customers all over the world.
In the next 10 years or even longer, Zhishang will always adhere to the tenet of quality first and reputation first, and devote itself to providing customers with thoughtful and perfect services.
As a professional Disodium Phosphate Heptahydrate manufacturer, Zhi shang Chemical has served more than 6,000 customers around the world. Because of our high-quality products and professional services, we have won high praise from most of our customers.
Service
Pre-Sales Service
* Timely reply and 24 hours online, the professional team will provide you with the most favorable prices and high-quality products.
* The sample supports testing and inspection.
* Each batch of products will be tested to ensure that its quality meets user needs.
*Packaging can also be made according to customer requirements.
*Any inquiries will be answered by our relevant personnel within 24 hours.
*We will provide you with commercial invoice, packing list, packing list, COA, health certificate and certificate of origin if you need it. If your market has other special requirements, please let us know.
After-Sales Service
*We will monitor the logistics information in real time and will share the information with you.
* You can consult us at any time if you have any questions about the product, and we will answer you in time.
*If you have any questions about the product, you can report it to us, we will deal with it in time for you, and the product can be returned.
Advice on Shipping
1. For products ≤50kg, we recommend using express delivery, which is usually called DDU service (discounted, convenient).
2. For products ≤500kg, we generally recommend air freight, which is usually called FOB, CFR or CIF service (fast and efficient).
3. For products >500kg, we generally recommend shipping by sea, which is usually called FOB, CFR or CIF service (economical, safe).
4. For high-value products, please choose air or express to ensure the safety of product transportation.
API, usually referring to chemical raw materials, is the active ingredient in chemical drug formulations.
Disodium Phosphate Heptahydrate Safety Information
| Hazard Codes | Xi |
| Risk Statements | 36/37/38 |
| Safety Statements | 26-36-24/25 |
| RIDADR | UN 3077 9 / PGIII |
| WGK Germany | 2 |
| RTECS | WC4600000 |
| TSCA | Yes |
| HazardClass | 9 |
| HS Code | 28352990 |
| Storage Class | 13 – Non Combustible Solids |
| Toxicity | LD50 orally in Rabbit: 12930 mg/kg |
OrganicIntermediate is a professional foreign trade enterprise specializing in chemical raw materials. Upholding people-oriented values and cooperating with reliable manufacturers, we aim to become the world’s most trusted chemical supplier. Our production plant is located 50 meters south of the intersection of North Ring Road and 13th Road, Chenwang Street, Juancheng County, Heze City, Shandong Province. Our R&D laboratory is situated at R&D Base : F5, Yinfeng Biomedical City, Free Trade Zone, Jinan, Shandong. Integrating R&D and production, we strictly control product quality. With stable supply and sincere service, we welcome global customers for consultation and procurement.
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This article was written by William, the chief chemist of Shandong Zhishang New Materials Co., Ltd.
Pubchem-Disodium Phosphate Heptahydrate