Alkaline buffering
TSP is alkaline and can influence formulation pH. Dose, taste, protein response and destination-market permissions must be assessed.
Food grade phosphate · Sodium orthophosphate · INS 339(iii)
Food Grade Trisodium Phosphate (TSP)
Trisodium phosphate is an alkaline sodium orthophosphate supplied in anhydrous or hydrated forms for selected buffering, emulsifying-salt, sequestration and water-management applications.
- CAS number
- 7601-54-9
- INS number
- 339(iii)
- Formula
- Na3PO4
- MOQ
- 500 kg
Reference assay≥97.0% anhydrous
Standard packing25 kg bag
Container loading24 MT / 20' FCL
QualificationCOA and certificates on request
Direct product answer
What is food grade trisodium phosphate?
Food grade trisodium phosphate (TSP), also called tribasic sodium phosphate, is INS 339(iii). The supplied sheet covers anhydrous Na3PO4 and dodecahydrate Na3PO4·12H2O forms.
This page separates the supplied commercial specification from independent identity references. Legal use, dosage and documentation must be confirmed for the destination market and exact food application.
Functional roles
Why is TSP used in food processing?
Performance depends on grade, dosage, formulation, process conditions and applicable food rules.
Sequestration and water management
The supplied information identifies water retention; recognized phosphate functions also include sequestration and emulsifying-salt use.
Food application screening
Common food grade TSP applications
These are application-screening areas, not universal use approvals or guaranteed outcomes.
Processed meat
Evaluate water retention, binding, yield, texture and sensory effects in the actual protein and salt system.
Processed cheese
May contribute to pH and mineral balance in qualified emulsifying-salt systems.
Dairy products
Screen protein interactions, buffering and stability while controlling alkalinity and flavor.
Beverages
Evaluate pH, clarity, mineral compatibility and taste before commercial use.
Dry ingredient blends
Confirm hydrate form, dissolution, flow and compatibility with acids and other minerals.
Sugar and process systems
The supplied information cites sugar-juice purification; food-contact and process use requires separate technical review.
Supplied technical data
Food grade TSP reference specification
The values below reproduce the supplied product sheet. They are not a batch COA or a universal regulatory standard. Confirm the current signed specification and methods before approval.
| Test item | Unit | Specification |
|---|---|---|
| Appearance | — | White crystalline or granular powder |
| Trisodium phosphate content | — | Form-dependent; see rows below |
| Anhydrous, as dried Na3PO4 | % | ≥97.0 |
| Dodecahydrate | % | ≥92.0 |
| Arsenic (As) | % | ≤0.0003 |
| Fluoride (F) | % | ≤0.005 |
| Heavy metals (as Pb) | % | ≤0.001 |
| Water-insoluble matter | % | ≤0.2 |
| Loss on drying | — | Form-dependent; see rows below |
| Anhydrous | % | ≤2.0 |
| Dodecahydrate | % | 45.0–57.0 |
Specification note: Anhydrous and dodecahydrate TSP differ substantially in formula weight and loss on drying. State the required form and analytical basis in the purchase specification and formulation calculations.
Qualification support
Documents and evidence to request
Product documents
Request the current specification/TDS, SDS, test methods and representative or batch COA.
Food qualification
Request applicable HACCP, Kosher, Halal and ISO documents; verify product, site, scope and validity.
Independent reference
Review the FAO/WHO JECFA trisodium phosphate record for identity context.
Storage and handling
Protect TSP from heat and moisture
- TemperatureThe supplied guidance states storage at no more than 30°C.
- EnvironmentKeep sealed in a cool, dry, ventilated place away from sunlight, heat, humidity and contamination.
- Workplace controlsFollow the current SDS and site procedures for dust control, hygiene and personal protection.
Buyer questions
Food grade TSP FAQ
What is food grade TSP used for?
Trisodium phosphate is an alkaline sodium orthophosphate supplied in anhydrous or hydrated forms for selected buffering, emulsifying-salt, sequestration and water-management applications. Confirm legal use and performance for the exact application.
What is the reference assay?
The supplied sheet states ≥97.0% anhydrous. Use the current signed specification and batch COA for acceptance.
What are the packing and minimum order?
The reference is 25 kg per bag, 24 MT per 20-foot container and a 500 kg minimum order.
Which documents should a buyer request?
Request specification/TDS, SDS, COA and applicable HACCP, Kosher, Halal and ISO documents for the exact source.
What information is needed for a quotation?
Provide grade or hydration form, application, specification, quantity, packing, destination, documents and delivery date.
Editorial review: Bespring Chemical technical and export team · Last reviewed 2026-07-20
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Specification-led sourcing
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