Molekula
Disodium hydrogen phosphate anhydrous
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Disodium hydrogen phosphate anhydrous is a versatile inorganic salt used as a buffering agent, emulsifier, and food additive. It also serves as a reagent in metal phosphatising and electroplating, a scale inhibitor in boiler water treatment, and a component of ceramic glazes and textile and leather processing aids. It features the CAS number 7558-79-4, a molecular formula of Na2HPO4, and a molecular weight of 141.96. This product is stored at ambient temperature and carries no signal word. Molekula supplies Disodium 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.
Pricing & pack sizes
On backorder — expected to ship by 23 November 2026
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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1 kg — $70.30 per pack
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 crystals or granules |
| Heavy metals | ≤0.001% |
| Loss on Drying | ≤5.0% |
| Water insoluble matter | ≤0.2% |
| Lead (Pb) | ≤0.0004% |
| Arsenic (As) | ≤0.0003% |
| Assay (dried basis) | ≥99.0% |
| Fluoride (F-) | ≤0.005% |
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 | 90038624 |
| 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
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
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 Disodium hydrogen phosphate anhydrous used for?
It is commonly used as a buffering agent, emulsifier, and sequestrant in various industrial, food, and pharmaceutical applications.
What are the chemical formula and molecular weight of this product?
The chemical formula is Na2HPO4 and the molecular weight is 141.96 g/mol.
How should Disodium hydrogen phosphate anhydrous be stored?
This product should be stored at ambient temperature.
What grade of Disodium hydrogen phosphate anhydrous is available?
Please contact our sales team to confirm the specific grade currently available for your requirements.
Can Molekula supply this product in bulk?
Yes, Molekula can supply Disodium hydrogen phosphate anhydrous in bulk quantities to meet your scale-up needs.
What documentation comes with the order?
All orders are supplied with a Certificate of Analysis (CoA) and a Safety Data Sheet (SDS).
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.