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 1999 · 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
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 — £38.40 per pack ex VAT · £46.08 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 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.
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
- 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.