Molekula
Sodium dihydrogen phosphate dihydrate
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
Sodium dihydrogen phosphate dihydrate is an inorganic salt widely used as a buffering agent, pH adjuster, and nutrient in pharmaceuticals, food processing, and laboratory applications. It also functions as a chelating agent and is employed in water treatment and cleaning formulations. This chemical has a CAS number of 13472-35-0, with the molecular formula NaH2PO4·2(H2O) and a molecular weight of 156.01 g/mol. It is non-hazardous, requiring no special signal word, and can be stored safely at ambient conditions. Molekula supplies sodium dihydrogen phosphate dihydrate 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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1 kg — £42.00 per pack ex VAT · £50.40 inc. VAT
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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.
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Specifications
| Property | Value |
|---|---|
| Appearance | Colourless or white crystalline powder |
| pH | 4.1 - 4.7 |
| Loss on Drying | 20 - 25% |
| Assay | ≥98.0% |
| Water insoluble matter | ≤0.5% |
| Lead (Pb) | ≤0.0004% |
| Arsenic (As) | ≤0.0003% |
| Fluoride (F-) | ≤0.005% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 32797683 |
| CAS Number | 13472-35-0 |
| IUPAC Name | sodium;dihydrogen phosphate;dihydrate |
| Molecular Formula | NaH2PO4·2(H2O) |
| Molecular Weight | 156.01 |
| Exact Mass | 155.98 |
| SMILES | O.O.OP(=O)(O)[O-].[Na+] |
| InChIKey | VBJGJHBYWREJQD-UHFFFAOYSA-M |
| InChI | InChI=1S/Na.H3O4P.2H2O/c;1-5(2,3)4;;/h;(H3,1,2,3,4);2*1H2/q+1;;;/p-1 |
| PubChem CID | 23673460 |
| REACH Code | Y113 |
| HTS Code | 2835220 |
| Tariff Code | 283522000 |
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, 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
- MONOBASIC SODIUM PHOSPHATE DIHYDRATE
- Monosodium dihydrogen phosphate dihydrate
- Monosodium phosphate dihydrate
- Phosphoric acid, monosodium salt, dihydrate
- Sodium Dihydrogen Orthophosphate dihydrate
- SODIUM DIHYDROGEN PHOSPHATE DIHYDRATE (EP MONOGRAPH)
- Sodium phosphate (NaH2PO4) dihydrate
- Sodium phosphate dihydrate
- Sodium phosphate monobasic dihydrate
- SODIUM PHOSPHATE, MONOBASIC, DIHYDRATE (II)
Frequently asked questions
What is sodium dihydrogen phosphate dihydrate commonly used for?
It is widely used as a buffering agent in biological and chemical applications, including cell culture media, pH adjustment in pharmaceutical formulations, and as a food additive (E339).
What is the chemical formula and molecular weight of sodium dihydrogen phosphate dihydrate?
The chemical formula is **NaH₂PO₄·2H₂O**, and its molecular weight is **156.01 g/mol**.
What is the recommended storage condition for this product?
Store at **ambient temperature** in a cool, dry place, away from incompatible substances.
What grades of sodium dihydrogen phosphate dihydrate does Molekula offer?
Molekula supplies this product in **ACS reagent grade** and **analytical grade** for high-purity applications.
Can Molekula supply sodium dihydrogen phosphate dihydrate in bulk quantities?
Yes, we offer bulk packaging options (e.g., 25 kg drums, 1 MT totes) for large-scale industrial or research needs.
What documentation comes with an order of sodium dihydrogen phosphate dihydrate?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
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.