TRIPOTASSIUM PHOSPHATE- ▸ Food processing: Acidity regulator, sequestrant, and stabilizer
- ▸ pH control: Alkaline buffering agent
- ▸ Agriculture: Potassium and phosphate source in fertilizers
- ▸ Industrial cleaning: Cleaning-agent formulations
- ▸ Corrosion control: Corrosion inhibitor
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Tripotassium phosphate (CAS 7778-53-2) is the tribasic potassium salt of orthophosphoric acid, K3PO4. It functions as an alkaline buffering and pH-regulating agent, as a sequestrant and stabilizer in food applications, and as a source of potassium and phosphate in fertilizer and soil-amendment use. It is also documented as a cleaning agent and corrosion inhibitor.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 231-907-1
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Solutions Using This Product
Process-solution guides on this site that specify this chemistry:
- Neutralizing Amines & pH Buffers for Waterborne Coatings (Coatings & Construction)
Frequently Asked Questions
What is tripotassium phosphate used for?
Tripotassium phosphate (K3PO4, CAS 7778-53-2) is the tribasic potassium salt of orthophosphoric acid. It functions as an alkaline buffering and pH-regulating agent, a sequestrant and stabilizer in food processing, a potassium and phosphate source in fertilizers, and is documented in industrial cleaning formulations and as a corrosion inhibitor.
What is the chemical formula of tripotassium phosphate?
The formula is K3PO4 (also written K3O4P). It is the fully neutralized tribasic potassium salt of phosphoric acid and is strongly alkaline in solution.
Is tripotassium phosphate the same as trisodium phosphate?
No. Tripotassium phosphate (K3PO4, CAS 7778-53-2) carries potassium cations, while trisodium phosphate (Na3PO4, CAS 7601-54-9) carries sodium. Both are tribasic orthophosphate salts and alkaline buffers, but they are distinct chemicals with different cations and specifications.
Is tripotassium phosphate available as a monohydrate?
Tripotassium phosphate is documented in both anhydrous and monohydrate forms; the form affects assay and handling. Specify the required form and grade when requesting a quote, and confirm against the CoA for each lot.
How is tripotassium phosphate supplied in bulk?
It is typically supplied as a granular or powder solid (and as solution for some applications) in bags, drums, or bulk depending on grade and volume. Request a bulk quote from RawSource for current packaging, lead time, and SDS/CoA documentation.
What is the REACH and TSCA regulatory status of Tripotassium Phosphate (Potassium Phosphate Tribasic)?
Tripotassium Phosphate (Potassium Phosphate Tribasic) (CAS 7778-53-2) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 231-907-1).