Acidity regulation and buffering
MSP is the acidic member of the sodium orthophosphate series and can contribute to pH control in compatible formulations.
Food grade phosphate · Sodium orthophosphate · INS 339(i)
Food Grade Sodium Dihydrogen Phosphate (MSP)
Sodium dihydrogen phosphate is an acidic sodium orthophosphate used in selected food systems for acidity regulation, emulsifying-salt functions and water management.
- CAS number
- 7558-80-7
- INS number
- 339(i)
- Formula
- NaH2PO4
- MOQ
- 500 kg
Reference assay98.0–103.0%
Standard packing25 kg bag
Container loading24 MT / 20' FCL
QualificationCOA and certificates on request
Product overview
What is food grade sodium dihydrogen phosphate?
Food grade sodium dihydrogen phosphate (MSP), also called monosodium phosphate, is INS 339(i). CAS 7558-80-7 identifies anhydrous NaH2PO4; hydrated forms must be specified separately.
Commercial specifications and independent additive-identity references serve different purposes. Legal use, dosage and documentation must be confirmed for the destination market and exact food application.
Functional roles
Why is MSP used in food processing?
Performance depends on grade, dosage, formulation, process conditions and applicable food rules.
Emulsification and water management
Evaluate emulsifying-salt and water-management functions in compatible cheese, meat, beverage and jelly formulations.
Food application screening
Common food grade MSP applications
These are application-screening areas, not universal use approvals or guaranteed outcomes.
Processed cheese
Evaluate acidity, emulsifying-salt balance, melt and texture in the complete cheese formulation.
Processed meat
Screen water retention, pH response, binding and yield under actual protein and salt conditions.
Beverages
Evaluate pH, taste, clarity and compatibility with minerals, proteins and other acids.
Jelly and desserts
Assess acidity regulation, gel behavior and shelf stability in the intended recipe.
Dry blends
Confirm hydrate form, flow, dissolution and moisture pickup in powdered ingredient systems.
Phosphate blends
Compare MSP alone and in permitted phosphate combinations for target pH and functional performance.
Commercial specifications
Food grade MSP reference specification
These commercial reference limits are separate from batch COA results and regulatory requirements. Agree the hydration form, methods and acceptance criteria in the signed specification.
| Test item | Unit | Specification |
|---|---|---|
| Sodium dihydrogen phosphate content | % | 98.0–103.0 |
| Insoluble matter | % | ≤0.2 |
| Arsenic (As) | % | ≤0.0003 |
| Fluoride (F) | % | ≤0.003 |
| Heavy metals (as Pb) | % | ≤0.001 |
| Lead (Pb) | % | ≤0.0004 |
| Loss on drying | — | Form-dependent; see rows below |
| Dihydrate reference — form to be agreed | % | 10.0–15.0 |
| Anhydrous | % | ≤2.0 |
| Appearance | — | Colorless crystals or white crystalline powder |
Specification note: NaH2PO4 is anhydrous, not monohydrate; NaH2PO4·2H2O is the dihydrate. The 10–15% loss-on-drying reference is labeled dihydrate but does not establish the correct hydration form or test method. Do not use that range to identify or accept a dihydrate lot without a signed specification defining the hydrate, formula, method and limit.
Qualification support
Product documents and quality requirements
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 sodium dihydrogen phosphate record for identity context.
Storage and handling
Protect MSP from heat and moisture
- TemperatureStore at no more than 30°C under the stated storage conditions.
- 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 MSP FAQ
What is food grade MSP used for?
Sodium dihydrogen phosphate is an acidic sodium orthophosphate used in selected food systems for acidity regulation, emulsifying-salt functions and water management. Confirm legal use and performance for the exact application.
What is the reference assay?
The commercial reference specification lists 98.0–103.0%. 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.
Related food phosphates
Compare adjacent options
Disodium Phosphate (DSP)
Review identity, specification, applications and sourcing details for this related food-grade phosphate.
Trisodium Phosphate (TSP)
Review identity, specification, applications and sourcing details for this related food-grade phosphate.
Sodium Aluminum Phosphate (SALP)
Review identity, specification, applications and sourcing details for this related food-grade phosphate.
Specification-led sourcing
Request a food grade MSP quote
Share application, specification, quantity, packing, destination and required documents.