Molekula
Potassium phosphate tribasic (Bk)
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 (K3PO4, CAS 7778-53-2) is an inorganic salt used as a buffer in pharmaceuticals, a nutrient in fertilizers, and a pH regulator in food processing. It appears as a white, hygroscopic powder with a molecular weight of 212.27 g/mol. Store at ambient conditions under dry conditions. The product carries a Danger signal word due to its corrosive and irritant properties.
Molekula supplies Potassium phosphate tribasic (Bk) in 100 g packs, from £39.60 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 5 languages. Larger quantities, up to multi-tonne, are quoted on request.
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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100 g — £33.00 per pack ex VAT · £39.60 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 to off-white powder |
| Identification | Conforms to reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Solubility (other solvents) | Freely soluble in water. Insoluble in ethanol |
Source: PubChem CID 62657 (EU Food Improvement Agents)
Identification
| Property | Value |
|---|---|
| SKU | 90037513 |
| CAS Number | 7778-53-2 |
| IUPAC Name | tripotassium;phosphate |
| EC Number | 231-907-1 |
| Molecular Formula | K3PO4 |
| Molecular Weight | 212.27 |
| Exact Mass | 211.8445 |
| SMILES | [O-]P(=O)([O-])[O-].[K+].[K+].[K+] |
| InChIKey | LWIHDJKSTIGBAC-UHFFFAOYSA-K |
| InChI | InChI=1S/3K.H3O4P/c;;;1-5(2,3)4/h;;;(H3,1,2,3,4)/q3*+1;/p-3 |
| PubChem CID | 62657 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 28352400 |
| Tariff Code | 2835240000 |
Safety & GHS
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Corrosive
GHS05
-
Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H318 Causes serious eye damage
- H335 May cause respiratory irritation
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P333+313 IF skin irritation or a rash occurs: Get medical advice/attention
- P337+313 If eye irritation persists get medical advice/attention
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.
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
No alternate names recorded for this product.
Frequently asked questions
What is potassium phosphate tribasic (Bk) commonly used for?
Potassium phosphate tribasic (Bk) is primarily used as a fertilizer, food additive (E340), buffering agent in pharmaceuticals, and in industrial applications like water treatment and pH adjustment.
What is the chemical formula and molecular weight of potassium phosphate tribasic (Bk)?
The chemical formula is K₃PO₄, and the molecular weight is 212.27 g/mol.
How should potassium phosphate tribasic (Bk) be stored?
Store at ambient temperature in a cool, dry, and well-ventilated area, away from incompatible substances. Keep containers tightly sealed.
What grades of potassium phosphate tribasic (Bk) does Molekula supply?
Molekula supplies potassium phosphate tribasic (Bk) specified as a white to off-white powder whose identification conforms to reference. No specific grade is stated in the specification, so please contact Molekula to confirm suitability for your application.
Can Molekula supply potassium phosphate tribasic (Bk) in bulk quantities?
Yes, Molekula can supply potassium phosphate tribasic (Bk) in bulk quantities, with packaging options including drums, bags, or custom solutions based on your requirements.
What documentation comes with an order of potassium phosphate tribasic (Bk)?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a packing list. Additional documentation like a Certificate of Conformity (CoC) may be provided upon request.
Where can I buy Potassium phosphate tribasic (Bk)?
Directly from Molekula, which lists Potassium phosphate tribasic (Bk) in 100 g packs from £39.60 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
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.