Molekula
Potassium pyrophosphate
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 pyrophosphate is a water-soluble inorganic salt used as a buffering agent, stabilizer, and sequestrant in food, pharmaceuticals, and industrial applications. It appears as a white crystalline powder. It also serves as an anti-scaling agent and corrosion inhibitor in wastewater treatment and petroleum production, and as an ingredient in soil fertilizers. CAS: 7320-34-5, Molecular formula: K4P2O7, Molecular weight: 330.34 g/mol, Storage: Ambient, Signal word: Warning. Molekula supplies Potassium pyrophosphate 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 — £41.20 per pack ex VAT · £49.44 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 powder or block |
| Heavy metals | ≤ 0.003% |
| pH | 10 - 10.7 |
| P2O5 | ≥ 42% |
| Water insoluble matter | ≤ 0.1% |
| K2O | ≥ 56% |
| Iron (Fe) | ≤ 0.01% |
| K4P2O7 | ≥ 98% |
| Chlorine (Cl) | ≤ 0.45% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 1090 °C |
| Boiling Point | 300 °C at 760 mmHg |
| Solubility (other solvents) | Soluble in water, insoluble in ethanol |
Source: PubChem CID 23740 (ICSC, PAC Chemical Database, EU Food Improvement Agents)
Identification
| Property | Value |
|---|---|
| SKU | 50220032 |
| CAS Number | 7320-34-5 |
| IUPAC Name | tetrapotassium;phosphonato phosphate |
| EC Number | 230-785-7 |
| Molecular Formula | K4P2O7 |
| Molecular Weight | 330.34 |
| Exact Mass | 329.7668 |
| SMILES | [O-]P(=O)([O-])OP(=O)([O-])[O-].[K+].[K+].[K+].[K+] |
| InChIKey | RYCLIXPGLDDLTM-UHFFFAOYSA-J |
| InChI | InChI=1S/4K.H4O7P2/c;;;;1-8(2,3)7-9(4,5)6/h;;;;(H2,1,2,3)(H2,4,5,6)/q4*+1;/p-4 |
| PubChem CID | 23740 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 28353910 |
| Tariff Code | 2835390000 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- 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, French, German, Italian, Portuguese, 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
- Diphosphoric acid, potassium salt
- Diphosphoric acid, tetrapotassium salt
- Potassium diphosphate
- Potassium pyrophospate
- Pyrophosphoric acid, tetrapotassium salt
- Tetrapotassium diphosphate
- Tetrapotassium diphosphorate
- TETRAPOTASSIUM PYROPHOSPHATE
- tetrapotassium;phosphonato phosphate
- TKPP
Frequently asked questions
What is potassium pyrophosphate used for?
It is used as a water softener, pH buffer, and in food preservation and detergent formulations.
What is the chemical formula and molecular weight of potassium pyrophosphate?
The formula is K4P2O7 with a molecular weight of 330.34 g/mol.
How should potassium pyrophosphate be stored?
Store at ambient temperature, protected from moisture and heat.
What grade is available for potassium pyrophosphate?
Available in reagent grade; other grades may be available upon request.
Can Molekula supply potassium pyrophosphate in bulk?
Yes, bulk quantities are available—please contact us for pricing and availability.
What documentation comes with a purchase of potassium pyrophosphate?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS) with the shipment.
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.