Food grade phosphate · Solid TKPP · INS 450(v) / E450(v)
Bespring supplies food grade tetrapotassium pyrophosphate (TKPP), a solid alkaline potassium phosphate evaluated in meat, seafood and processed-cheese systems. Specify the food standard, assay basis, fluoride limit and powder or granular form before selecting a grade for your process.
Product illustration · grade and packaging specified in your offer
*Confirm current order terms. Include application, destination, required standard, critical impurity limits and quantity. See the commercial fluoride-limit comparison below.
Reference assayK₄P₂O₇ content ≥ 95.0%
Reference packing25 kg bag
Container loadingReference: 20 MT / 20' FCL
Document supportRequest grade-specific COA, TDS, SDS and certificate scope
Product overview
Tetrapotassium pyrophosphate (TKPP), also called tetrapotassium diphosphate or potassium pyrophosphate, is the potassium salt of pyrophosphoric acid. Its chemical formula is K4P2O7, its CAS number is 7320-34-5, and its food additive identity is INS 450(v) / E450(v). This page describes solid TKPP with the anhydrous formula shown, not a liquid solution or a specified hydrate.
TKPP is hygroscopic and soluble in water. The JECFA TKPP monograph identifies emulsifier and texturizer functions. Its formula weight is 330.34 g/mol. Confirm the offered grade’s form and reporting basis; absorbed moisture is not evidence of a defined crystalline hydrate. Food qualification requires the relevant specification and documents, rather than chemical identity alone.
Potassium-based phosphate decision
Evaluate TKPP when potassium-based pyrophosphate functionality addresses a defined formulation requirement. Compare sodium and potassium contribution, solution behavior and measured finished-food performance with the current phosphate system.
The K₄P₂O₇ formula contains no sodium; sodium impurities in the offered grade need separate confirmation, so it may be screened against TSPP in sodium-reduction work. This does not make the finished food “low sodium”; calculate every sodium source and verify the legal claim criteria.
Pure anhydrous K4P2O7 is theoretically about 47.4% potassium by mass. This formula calculation is not a batch assay. Request composition data for the offered grade and distinguish elemental K and P from K₂O or P₂O₅ reporting.
JECFA gives pH 10.0–10.7 for a 1 in 100 solution. This is a standard reference, not a grade-specific commercial pH guarantee or the final food pH. Measure the complete formulation and assess flavor, color and texture under the intended process.
Although TKPP is water-soluble, practical dissolution depends on concentration, temperature, water hardness, agitation, salt content and ingredient order. Check clarity and sediment in the actual brine or process water.
Claim boundary: replacing a sodium phosphate with TKPP can reduce sodium contributed by that ingredient, but nutritional claims require a calculation for the complete finished food and the destination market.
Functional roles
The FDA potassium pyrophosphate inventory lists emulsifier/emulsifier-salt and texturizer effects, consistent with the JECFA monograph. These functions describe the ingredient; they do not establish performance or permission for every food.
Pyrophosphate can interact with polyvalent ions such as calcium. TKPP also gives an alkaline aqueous solution. Sequestration and pH adjustment are distinct effects; evaluate mineral balance, protein behavior, clarity and sediment separately in the complete system.
In suitable meat or cheese systems, an alkaline phosphate system can support protein hydration and fat–water stabilization. Raw material, salt, shear, temperature and total phosphate determine the result.
Food industry uses
Use these application areas to define a trial brief, then confirm the exact food category and permitted use in the destination market. A reference specification does not predict retained yield, texture or storage stability.
Compare TKPP within a phosphate system when sodium contribution, protein extraction, water binding or emulsion stability is under review. Record brine clarity, pickup, cook loss, chilled purge, texture and sensory quality.
Screen calcium sequestration, casein hydration and fat–water emulsification. Control natural-cheese composition, calcium, moisture, pH, heating, shear and cooling before judging slice or spread texture.
Where permitted, compare TKPP or a phosphate blend for solution behavior and retained yield. Measure pickup after equal drainage, thaw/cook loss, texture and retained phosphate where required. Follow the TKPP frozen-seafood trial guide for species and process variables.
Use TKPP as one component only when its alkalinity and pyrophosphate functionality help meet a defined sodium, solubility or performance target. Validate blend compatibility and storage stability.
Technical information
These commercial reference limits are separate from batch COA results and do not establish conformity to every international compendium. Agree the current specification and test methods before ordering. For mass-based reporting, 1 ppm = 1 mg/kg; the commercial 0.003% fluoride value is 30 mg/kg, not 3 mg/kg.
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| Test item | Unit | Commercial limit | Purchasing requirements |
|---|---|---|---|
| K₄P₂O₇ content | % | ≥ 95.0 | Commercial basis/method unconfirmed; JECFA ≥95% is on the ignited basis |
| Water-insoluble matter | % | ≤ 0.2 | Same numerical limit as JECFA; confirm the method and lot result |
| Arsenic (As) | mg/kg | ≤ 3 | JECFA ≤3; published EU E450(v) text ≤1. Confirm separate As testing |
| Heavy metals (as Pb) | mg/kg | ≤ 10 | Aggregate “as Pb” test; does not replace Pb, As, Cd or Hg results |
| Lead (Pb) | mg/kg | ≤ 2 | JECFA ≤4; published EU E450(v) text ≤1. Confirm separate Pb testing |
| Fluoride (F) | mg/kg | ≤ 30 | JECFA and published EU E450(v) text ≤10; commercial limit cannot guarantee this |
| “Loss on ignition at 110°C” | % | ≤ 0.5 | Temperature and method require agreement; equivalence to JECFA LOI is not established |
| Cadmium (Cd) | mg/kg | ≤ 1 | Commercial limit; confirm element-specific method and batch result |
| Mercury (Hg) | mg/kg | ≤ 1 | Commercial limit; confirm element-specific method and batch result |
| Appearance | — | White powder or granules | Confirm offered powder/granular form and particle distribution |
Specification decision: The commercial fluoride maximum is 30 mg/kg, compared with 10 mg/kg in JECFA and the published EU E450(v) text. That limit cannot guarantee either requirement, although an individual batch may test lower. Published EU arsenic and lead maxima are each 1 mg/kg, below the commercial 3 and 2 mg/kg limits. Request an aligned specification, methods and batch COA; matching selected limits does not establish full conformity.
Test-basis distinction: The commercial reference is “Loss on ignition at 110°C” ≤0.5%. JECFA ignition loss is ≤2% using 105°C for 4 hours, then 550°C for 30 minutes. The commercial label does not establish that method and must not be treated as a loss-on-drying result. Assay, ignition loss and P₂O₅ are separate measurements.
JECFA lists INS 450(v), CAS 7320-34-5, formula K4P2O7, formula weight 330.34 g/mol, assay ≥95% on the ignited basis and pH 10.0–10.7 for a 1 in 100 solution.
Review the JECFA monographThe published Regulation (EU) No 231/2012 text specifies E450(v) P2O5 42.0–43.7% on the anhydrous basis. This is a standard requirement, not a Bespring commercial value. Check the latest consolidated text and amendments before market approval.
Open the consolidated EU specificationAvoid phosphate-name confusion
These materials are not interchangeable by acronym or equal weight. Compare the ion, phosphate chain, alkalinity, solubility, legal identity and validated function.
K4P2O7 · INS 450(v)
Potassium pyrophosphate; consider when potassium-based, alkaline pyrophosphate functionality is required.
Na4P2O7 · INS 450(iii)
Sodium pyrophosphate; compare sodium contribution, practical dissolution and equivalent functional performance.
Review food grade TSPPK5P3O10
Potassium tripolyphosphate has a different phosphate chain and specification. Do not treat the similar abbreviation as the same ingredient.
Review food grade KTPPQualification support
Certificates and management-system documents are time-sensitive. Ask for current, applicable copies and verify the product name, site, scope, issuer and validity dates during supplier qualification.
Current specification, technical data sheet, safety data sheet and a representative or batch-specific certificate of analysis.
State any HACCP, Kosher, Halal, allergen or source-document requirements. Confirm availability and current coverage for the exact offered product and production or packing site.
Request the current ISO certificate and scope, together with traceability or quality questionnaires. A company or sales-service certificate does not automatically cover the product, manufacturing site or batch.
Storage & handling
Appearance and handling references
Application approval
A potassium-phosphate substitution should be approved from measured product and process results, not only a nutrition calculation.
Record current phosphate, sodium and potassium sources, water chemistry, formula pH, process loss and target claim.
Add TKPP gradually under agitation and record temperature, concentration, ingredient order, dissolution time, clarity and sediment.
Hold raw material, salt, water, shear, temperature, processing and sampling constant against the approved control.
Assess finished pH, sodium/potassium calculation, yield, purge, emulsion or texture, flavor, storage stability and legal labeling.
Buyer questions
TKPP supplies potassium rather than the sodium supplied by TSPP. Compare the full formula’s sodium and potassium contribution, pH, dissolution, flavor and process results. An equal-weight substitution or a finished-food low-sodium claim must not be assumed.
Yes. Tetrapotassium pyrophosphate, tetrapotassium diphosphate and potassium pyrophosphate identify K₄P₂O₇, CAS 7320-34-5, INS 450(v) / E450(v). This page describes the solid material; a liquid solution requires a separately specified concentration.
No. Its chemical formula contains no sodium, but the offered grade may have impurities and the food contains other sodium sources. Use supported composition data for the complete finished food and verify destination-market claim criteria.
Specify the offered powder or granular form, water temperature and hardness, target concentration, agitation, salt/mineral content and ingredient order. Measure dissolution time, clarity, sediment and solution pH in the actual process water or brine.
It cannot guarantee conformity. The fluoride limit is 30 mg/kg, compared with 10 mg/kg in JECFA and the published EU E450(v) text. The published EU arsenic and lead limits are also lower. A batch may test below the commercial maximum; request an aligned specification, confirmed methods and a batch COA, and check the current applicable standard.
Provide solid food grade TKPP, powder/granular preference, application and process, destination market, required standard, assay basis, fluoride and other critical limits, quantity, packaging, port, Incoterm and delivery requirements. List the TDS, SDS, COA and declarations needed for approval.
No. The chemical name and CAS do not establish food qualification. Impurity controls, intended use, documentation and applicable rules differ. Specify food grade and the required standard; do not qualify a technical, fertilizer or liquid product from identity alone.
No equivalence is established. The commercial reference states “Loss on ignition at 110°C” ≤0.5%, while JECFA uses 105°C for 4 hours followed by 550°C for 30 minutes, with a ≤2% limit. Agree the analytical method and reporting basis; do not rename the commercial result loss on drying.
Continue the decision
Compare the sodium analogue by ion contribution, solution behavior and validated application performance.
Review a different potassium condensed phosphate without confusing the TKPP and KTPP abbreviations.
Consider a defined blend where alkalinity, solubility and functional timing must be balanced.
Use the application guide to design pickup, cook-loss, purge and sensory trials.
Connect emulsifying-salt selection with calcium, casein, heating, shear and cooling variables.
Start a sourcing conversation
Share the details that affect technical fit, documentation and landed cost. Our team can then prepare a relevant commercial response.
Tell us your grade and destination market so we can confirm which documents are available for your order.
An external reference is not a batch certificate or a Bespring product specification.