Molekula
di-Potassium hydrogen phosphate trihydrate
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
Di-Potassium hydrogen phosphate trihydrate is a water-soluble inorganic salt used as a buffer, pH adjuster, and nutrient source in laboratory and industrial applications. It is available in high purity with consistent quality. CAS: 16788-57-1, Molecular formula: HK2O4P · 3H2O, Molecular weight: 228.22, Storage: Ambient, Signal word: None. Molekula supplies di-Potassium hydrogen phosphate trihydrate 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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500 g — £42.00 per pack ex VAT · £50.40 inc. VAT
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1 kg — £76.00 per pack ex VAT · £91.20 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 | Colorless or white crystal |
| Heavy metals | ≤0.0015% |
| Identification | Conforms to reference |
| pH | 8.9 - 9.4 (15g/l,25°C) |
| Assay | ≥98% |
| Water insoluble matter | ≤0.2% |
| Arsenic (As) | ≤0.0003% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
For research use only. Not for human use.
Identification
| Property | Value |
|---|---|
| SKU | 46074591 |
| CAS Number | 16788-57-1 |
| IUPAC Name | dipotassium;hydrogen phosphate;trihydrate |
| Molecular Formula | HK2O4P · 3H2O |
| Molecular Weight | 228.22 |
| Exact Mass | 227.9204 |
| SMILES | O.O.O.OP(=O)([O-])[O-].[K+].[K+] |
| InChIKey | XQGPKZUNMMFTAL-UHFFFAOYSA-L |
| InChI | InChI=1S/2K.H3O4P.3H2O/c;;1-5(2,3)4;;;/h;;(H3,1,2,3,4);3*1H2/q2*+1;;;;/p-2 |
| PubChem CID | 16217523 |
| REACH Code | Y113 |
| Tariff Code | 28352400 |
Safety & GHS
Detailed safety information available in the SDS — see Documents below.
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
- Dipotassium hydrogen phosphate (k2hpo4) trihydrate
- Dipotassium hydrogenorthophosphate trihydrate
- Dipotassium monophosphate trihydrate
- Dipotassium orthophosphate, trihydrate
- Dipotassium phosphate trihydrate
- Phosphoric acid, dipotassium salt, trihydrate
- Phosphoric acid, dipotassium salt, trihydrate (8CI,9CI)
- Potassium hydrogenphosphate trihydrate
- Potassium phosphate dibasic trihydrate
- trihydratedibasicpotassium phosphate
Frequently asked questions
What is di-Potassium hydrogen phosphate trihydrate used for?
It is commonly used as a buffer in biochemical applications and as a nutrient source in cell culture media.
What is the chemical formula and molecular weight?
The formula is HK2O4P · 3H2O with a molecular weight of 228.22 g/mol.
How should it be stored?
Store at ambient temperature, protected from moisture and heat.
What grade is available?
Available in analytical grade for laboratory use.
Can Molekula supply it in bulk?
Yes, Molekula offers bulk quantities upon request; please contact sales for details.
What documentation comes with the order?
Each order includes a Certificate of Analysis (CoA) and 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.