Molekula
di-Sodium hydrogen phosphate dodecahydrate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Di-sodium hydrogen phosphate dodecahydrate (Na2HPO4·12H2O) is a water-soluble inorganic salt widely used as a buffering agent, pH regulator, and nutrient in food, pharmaceuticals, and industrial processes. It also functions in detergent formulations, water treatment, and as a laboratory reagent for maintaining buffer solutions. CAS 10039-32-4, molecular weight 358.14 g/mol, stored at ambient conditions. Signal word: Warning. Molekula supplies di-sodium hydrogen phosphate dodecahydrate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
-
1 kg — £76.20 per pack ex VAT · £91.44 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White powder |
| Water insoluble matter | ≤ 0.2% |
| Lead (Pb) | ≤0.001% |
| Arsenic (As) | ≤ 0.0003% |
| Assay (dried basis) | ⩾ 98.0% |
| Fluoride (F-) | ≤ 0.005% |
| Identification (RAMAN) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Identification
| Property | Value |
|---|---|
| SKU | 80269724 |
| CAS Number | 10039-32-4 |
| IUPAC Name | disodium;hydrogen phosphate;dodecahydrate |
| Molecular Formula | Na2HPO4 · 12H2O |
| Molecular Weight | 358.14 |
| Exact Mass | 358.0676 |
| SMILES | O.O.O.O.O.O.O.O.O.O.O.O.OP(=O)([O-])[O-].[Na+].[Na+] |
| InChIKey | DGLRDKLJZLEJCY-UHFFFAOYSA-L |
| InChI | InChI=1S/2Na.H3O4P.12H2O/c;;1-5(2,3)4;;;;;;;;;;;;/h;;(H3,1,2,3,4);12*1H2/q2*+1;;;;;;;;;;;;;/p-2 |
| PubChem CID | 61456 |
| REACH Code | Y110 |
| HTS Code | 2835220000 |
| Tariff Code | 2835220000 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Russian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Disodium orthophosphate, dodecahydrate
- disodium phosphate 12 hydrate
- Disodium phosphate dodecahydrate
- H25Na2O16P
- MONOSODIUM PHOSPHATE DODECAHYDRATE
- Phosphoric acid, disodium salt, dodecahydrate
- Sodium hydrogenphosphate dodecahydrate
- Sodium monohydrogen phosphate dodecahydrate
- Sodium monohydrogen phosphate dodecahydrate (2:1:1:12)
- Sodium phosphate dibasic dodecahydrate
Frequently asked questions
What is di-Sodium hydrogen phosphate dodecahydrate commonly used for?
It is widely used in buffer solutions for pH regulation (e.g., in biological research, pharmaceuticals, and food processing), as a food additive (E339), and in water treatment for pH adjustment.
What is the chemical formula and molecular weight of di-Sodium hydrogen phosphate dodecahydrate?
The formula is **Na₂HPO₄·12H₂O**, and the molecular weight is **358.14 g/mol**.
How should di-Sodium hydrogen phosphate dodecahydrate be stored?
Store in a tightly sealed container at **ambient temperature**, away from moisture and incompatible substances to prevent deliquescence or degradation.
What grades or purity levels does Molekula offer for this product?
Molekula supplies **analytical grade** and **food-grade (E339)** di-Sodium hydrogen phosphate dodecahydrate, with purity levels specified on the Certificate of Analysis (CoA).
Can Molekula supply di-Sodium hydrogen phosphate dodecahydrate in bulk quantities?
Yes, we offer bulk packaging options (e.g., 25 kg drums, 1-tonne containers) for industrial, research, or food-grade applications—please inquire for specific availability.
What documentation is provided with an order of di-Sodium hydrogen phosphate dodecahydrate?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability and compliance.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.