Molekula
di-Sodium hydrogen phosphate anhydrous
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 anhydrous is a white, crystalline powder used as a buffering agent, pH regulator, and emulsifier in food, pharmaceuticals, and industrial applications. It is also employed in water treatment and laboratory reagents. CAS: 7558-79-4, Molecular Formula: Na2PO4H, Molecular Weight: 141.96 g/mol, Storage: Ambient, Signal Word: None. Molekula supplies di-Sodium hydrogen phosphate anhydrous 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.
Often bought together
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.
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100 g — £16.00 per pack ex VAT · £19.20 inc. VAT
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250 g — £19.00 per pack ex VAT · £22.80 inc. VAT
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500 g — £22.70 per pack ex VAT · £27.24 inc. VAT
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1 kg — £38.30 per pack ex VAT · £45.96 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/ off white powder |
| Chloride (Cl-) | ≤ 0.001% |
| Assay | ≥99.0% |
| Water insoluble matter | ≤ 0.005% |
| Iron (Fe) | ≤ 0.0005% |
| Arsenic (As) | ≤ 0.0005% |
| Potassium (K) | ≤ 0.005% |
| Loss on drying (120°C) | ≤5.0% |
| Sulphates (SO4)(2-) | ≤0.01% |
| pH (1% sol.) | 9.0-9.6 |
| Nitrogen (N) | Compounds: Max. 0.001% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White, hygroscopic powder |
| Odour | None |
| Solubility (other solvents) | Freely soluble in water. Insoluble in ethanol |
| Refractive Index | 1.463 |
| pKa | pKa1 = 2.15 |
Source: PubChem CID 24203 (HSDB, EU Food Improvement Agents)
Identification
| Property | Value |
|---|---|
| SKU | 40775320 |
| CAS Number | 7558-79-4 |
| IUPAC Name | disodium;hydrogen phosphate |
| EC Number | 231-448-7 |
| Molecular Formula | Na2PO4H |
| Molecular Weight | 141.96 |
| Exact Mass | 141.9408 |
| SMILES | OP(=O)([O-])[O-].[Na+].[Na+] |
| InChIKey | BNIILDVGGAEEIG-UHFFFAOYSA-L |
| InChI | InChI=1S/2Na.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-2 |
| PubChem CID | 24203 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 28352200 |
| Tariff Code | 2835220000 |
Safety & GHS
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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
- Acetest
- Dibasic sodium phosphate
- Disodium acid phosphate
- Disodium hydrogen phosphate
- Disodium hydrogenorthophosphate
- DISODIUM PHOSPHATE
- Exsiccated sodium phosphate
- Soda phosphate
- Sodium hydrogen phosphate
- Sodium phosphate dibasic
Frequently asked questions
What is di-Sodium hydrogen phosphate anhydrous used for?
It is commonly used as a buffering agent in biochemical applications and in the formulation of detergents and cleaning products.
What is the chemical formula and molecular weight?
The formula is Na2PO4H and the molecular weight is 141.96 g/mol.
How should di-Sodium hydrogen phosphate anhydrous be stored?
It should be stored at ambient temperature, protected from moisture and contamination.
What grade is available?
Available in laboratory grade; other grades may be available upon request.
Can Molekula supply it in bulk?
Yes, bulk quantities are available—please contact our sales team for pricing and availability.
What documentation comes with the order?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS) with the shipment.
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.