Buffer systems
MKP can contribute phosphate buffering and potassium in suitable formulations where pH behavior must be controlled.
Food grade phosphate · Potassium salt · CAS 7778-77-0
Food Grade Monopotassium Phosphate (MKP)
Monopotassium phosphate is an orthophosphate used in selected food and fermentation systems as a buffer, culture nutrient, yeast-culture aid, leavening component and fermentation aid.
- CAS number
- 7778-77-0
- Formula
- KH2PO4
- Dry-basis assay
- ≥98.0%
- MOQ
- 500 kg
State that food grade is required and include the application, specification, quantity, destination and documents.
Reference assayKH2PO4 ≥98.0% on dry basis
Standard packing25 kg bag
Container loadingReference: 23 MT / 20' FCL
Food-grade reviewCOA and applicable certificates on request
Direct product answer
What is food grade monopotassium phosphate?
Food grade monopotassium phosphate (MKP), also called potassium dihydrogen phosphate or monobasic potassium phosphate, is an orthophosphate with formula KH2PO4 and CAS number 7778-77-0.
The supplied specification states at least 98.0% KH2PO4 on a dry basis. Food buyers should distinguish this grade from fertilizer or technical grades and qualify identity, impurities, documentation and application performance.
Food and fermentation uses
Where is food grade MKP used?
The supplied application guidance identifies culture, seasoning, yeast, leavening and fermentation roles. Technical suitability and legal status must be confirmed for the exact use.
Microbial culture
May be used as a phosphate and potassium source in qualified bacterial-culture and bioprocess media.
Yeast culture
Evaluated in yeast cultivation and brewing-related culture systems as part of a complete nutrient program.
Seasoning manufacture
The supplied guidance identifies MKP in processes used to synthesize or produce selected seasoning materials.
Leavening systems
Can be assessed as a phosphate component in selected leavening formulations, with reaction behavior verified in the real recipe.
Fermentation aids
May support fermentation when phosphate, potassium and buffering needs are defined and validated at process scale.
Supplied technical data
Food grade MKP reference specification
The values below reproduce the supplied product sheet. They are not a batch COA or a substitute for the current signed food-grade specification and test methods.
| Test item | Specification |
|---|---|
| Monopotassium phosphate (KH2PO4) content, dry basis | ≥98.0% |
| Fluoride (F) | ≤0.001% |
| Heavy metals (as Pb) | ≤0.001% |
| Loss on ignition | ≤0.5% |
| Water-insoluble matter | ≤0.1% |
| Arsenic (As) | ≤0.0003% |
| Cadmium (Cd) | ≤0.0001% |
| Mercury (Hg) | ≤0.0001% |
| Lead (Pb) | ≤0.0005% |
Grade note: "MKP" is sold into food, fermentation, fertilizer and technical markets. Require the offered documents to state the applicable food-grade specification and source; do not approve a grade by chemical name alone.
Buyer qualification
How to qualify food grade MKP
Connect the raw-material specification to media performance, finished-food requirements and destination-market rules.
Confirm exact grade
Verify product name, CAS, formula, food-grade basis, source, packaging and traceability before sampling.
Test the real process
Evaluate dissolution, pH and buffering, culture growth or fermentation response, sensory impact and downstream compatibility.
Review current documents
Request specification/TDS, SDS, COA and applicable HACCP, Kosher, Halal and ISO documentation for the offered supply.
Storage and handling
Keep MKP cool, dry and sealed
- TemperatureThe supplied guidance states storage at no more than 30°C.
- EnvironmentProtect sealed bags from direct sunlight, high temperature, humidity and contamination in a ventilated area.
- Workplace controlsFollow the current SDS and site procedures for dust handling and personal protection.
Buyer questions
Food grade MKP FAQ
Is monopotassium phosphate the same as potassium dihydrogen phosphate?
Yes. Monopotassium phosphate, potassium dihydrogen phosphate and monobasic potassium phosphate are names for KH2PO4, CAS 7778-77-0.
How is food grade MKP different from fertilizer grade?
The chemical identity may be the same, but the applicable specification, impurities, controls, documentation, production or packing scope and regulatory suitability can differ. Require food-grade evidence for the offered source.
What is the reference assay?
The supplied food-grade sheet states at least 98.0% KH2PO4 on a dry basis. Confirm the current signed specification and batch COA.
What are the packing and minimum order?
The supplied reference is 25 kg per bag, 23 metric tons per 20-foot container and a 500 kg minimum order. Confirm current pallet, liner and loading details.
What details are needed for an MKP quotation?
State food grade, the intended application, target specification, quantity, packing, destination port, required documents and requested delivery date.
Editorial review: Bespring Chemical technical and export team · Last reviewed 2026-07-19
Related potassium phosphates
Compare adjacent food-grade options
Potassium Metaphosphate (KMP)
Metaphosphate with different composition and food-processing functions.
Potassium Tripolyphosphate (KTPP)
Condensed phosphate for selected emulsification, moisture and sequestration systems.
Tetrapotassium Pyrophosphate (TKPP)
Alkaline pyrophosphate for selected food-processing applications.
Specification-led sourcing
Request a food grade MKP quote
Share the technical and commercial details needed to review the food-grade supply.
- Application and target specification
- Quantity, packing and destination
- Required certificates and delivery timing