Molekula
Sodium phosphate monobasic monohydrate
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
Sodium phosphate monobasic monohydrate is an inorganic salt of sodium, hydrogen, and phosphate, commonly used as a buffering agent, pH regulator, and nutrient in pharmaceuticals, food processing, and laboratory applications. It also functions as a chelating agent and water softener in industrial processes. This chemical has a CAS number of 10049-21-5, with the molecular formula NaH₂PO₄·H₂O and a molecular weight of 137.99 g/mol. It is stable at ambient storage conditions and carries no signal word for hazard classification. Molekula supplies sodium phosphate monobasic monohydrate 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
In stock — same-day dispatch
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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500 g — £18.00 per pack ex VAT · £21.60 inc. VAT
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1 kg — £30.90 per pack ex VAT · £37.08 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.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White particles |
| Heavy metals | ≤ 0.001% |
| pH | 4.0 - 5.0 |
| Loss on Drying | 10.0 - 15.0 % |
| Chloride (Cl-) | ≤ 0.005% |
| Assay | 98.0 - 103.0 % |
| Water insoluble matter | ≤ 0.2% |
| Lead (Pb) | ≤ 0.001% |
| Identification (IR) | Conforms to Reference |
| Arsenic (As) | ≤ 0.0003% |
| Fluoride (F-) | ≤ 0.003% |
| Conforms to FCC | Conforms |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 46304862 |
| CAS Number | 10049-21-5 |
| IUPAC Name | sodium;dihydrogen phosphate;hydrate |
| Molecular Formula | NaH2PO4 · H2O |
| Molecular Weight | 137.99 |
| Exact Mass | 137.9694 |
| SMILES | O.OP(=O)(O)[O-].[Na+] |
| InChIKey | BBMHARZCALWXSL-UHFFFAOYSA-M |
| InChI | InChI=1S/Na.H3O4P.H2O/c;1-5(2,3)4;/h;(H3,1,2,3,4);1H2/q+1;;/p-1 |
| PubChem CID | 516949 |
| REACH Code | Y113 |
| HTS Code | 2835220000 |
| 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, 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.
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
- MONOBASIC SODIUM PHOSPHATE MONOHYDRATE
- Monosodium phosphate monohydrate
- OSMOPREP COMPONENT SODIUM PHOSPHATE, MONOBASIC, MONOHYDRATE
- Phosphoric acid, monosodium salt, monohydrate
- Sodium dihydrogen phosphate monohydrate
- sodium dihydrogen phosphate--water (1/1)
- Sodium phosphate monohydrate
- SODIUM PHOSPHATE, MONOBASIC, MONOHYDRATE (II)
- SODIUM PHOSPHATE, MONOBASIC, MONOHYDRATE COMPONENT OF VISICOL
- VISICOL COMPONENT SODIUM PHOSPHATE, MONOBASIC, MONOHYDRATE
Frequently asked questions
What is sodium phosphate monobasic monohydrate commonly used for?
It is widely used as a buffering agent in pharmaceuticals, food processing (e.g., emulsifier/stabilizer), and laboratory applications like pH adjustment in biological buffers.
What is the chemical formula and molecular weight of sodium phosphate monobasic monohydrate?
The formula is **NaH₂PO₄·H₂O**, and the molecular weight is **137.99 g/mol**.
How should sodium phosphate monobasic monohydrate be stored?
Store in a tightly sealed container at **ambient temperature**, away from moisture and incompatible substances.
What grades of sodium phosphate monobasic monohydrate does Molekula offer?
Molekula supplies **ACS reagent grade** and **technical grade** for industrial and laboratory use.
Can Molekula supply sodium phosphate monobasic monohydrate in bulk quantities?
Yes, we offer bulk packaging options (e.g., 25 kg drums, 1 MT bags) for large-scale applications—please inquire for specific quantities.
What documentation is provided with an order of sodium phosphate monobasic monohydrate?
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.