Molekula
Potassium phosphate tribasic monohydrate
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
Potassium phosphate tribasic monohydrate is a water-soluble inorganic salt used as a buffer, pH adjuster, and nutrient source in pharmaceuticals, food, and laboratory applications. It appears as a white crystalline powder with a molecular weight of 230.28 g/mol, a CAS number of 27176-10-9, and a molecular formula of H2K3O5P. Store at ambient temperatures. Signal word: Danger. Molekula supplies Potassium phosphate tribasic 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.
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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500 g — £38.40 per pack ex VAT · £46.08 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 solid |
| Identification | Conforms to reference |
| pH | 11.5 - 12.5 |
| Assay | ≥ 96.0% |
| Residue on Ignition | ≤ 13% |
| Heavy Metals (Pb) | ≤ 10.0mg/kg |
| Water insoluble matter | ≤ 0.2% |
| Lead (Pb) | ≤ 2.0mg/kg |
| Arsenic (As) | ≤ 3.0mg/kg |
| Fluoride (F-) | ≤ 10.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Identification
| Property | Value |
|---|---|
| SKU | 14713809 |
| CAS Number | 27176-10-9 |
| IUPAC Name | tripotassium;phosphate;hydrate |
| Molecular Formula | H2K3O5P |
| Molecular Weight | 230.28 |
| Exact Mass | 229.8551 |
| SMILES | O.[O-]P(=O)([O-])[O-].[K+].[K+].[K+] |
| InChIKey | RMNIZOOYFMNEJJ-UHFFFAOYSA-K |
| InChI | InChI=1S/3K.H3O4P.H2O/c;;;1-5(2,3)4;/h;;;(H3,1,2,3,4);1H2/q3*+1;;/p-3 |
| PubChem CID | 22031701 |
| REACH Code | Y110 |
| HTS Code | 28352400 |
| Tariff Code | 2835240000 |
Safety & GHS
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Corrosive
GHS05
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H318 Causes serious eye damage
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P337+313 If eye irritation persists get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, German, Italian, 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
- K3PO4 H2O
- Phosphoric acid, tripotassium salt, monohydrate
- potassium phosphate hydrate
- potassium phosphate monohydrate
- Potassium phosphate xhydrate
- tert-Potassium phosphate monohydrate
- tripotassium orthophosphate monohydrate
- Tripotassium Phosphate xHydrate
- Tripotassium phosphate, monohydrate
- tripotassium;phosphate;hydrate
Frequently asked questions
What is potassium phosphate tribasic monohydrate used for?
It is commonly used as a buffer in biochemical applications and as a reagent in pharmaceutical and food processing industries.
What is the chemical formula and molecular weight?
The formula is H2K3O5P and the molecular weight is 230.28 g/mol.
How should potassium phosphate tribasic monohydrate be stored?
It should be stored at ambient temperature, protected from moisture and heat.
What grade is available?
Available in reagent grade; other grades may be available upon request.
Can Molekula supply it in bulk?
Yes, Molekula can supply potassium phosphate tribasic monohydrate in bulk quantities; please contact sales for details.
What documentation comes with the order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS); additional documentation is available upon request.
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.