Monopotassium Phosphate (MKP), CAS 7778-77-0, E 340(i) | Phosphate Additive, pH Buffer - - PREMIUM INGREDIENT

Monopotassium Phosphate (MKP), CAS 7778-77-0, E 340(i) | Phosphate Additive, pH Buffer

Categories:

Phosphates

CAS No:

7778-77-0

4 / 1

Description

Certificates

Basic Info

Characteristics

Hazard Identification

Handling and Storage

Basic Information

Item	Monopotassium Phosphate
Product Full Name	Monopotassium Phosphate
Common Abbreviation	MKP
CAS No.	7778-77-0
E Number (EU Food Additive)	E 340(i)
Molecular Formula	KH₂PO₄
Molecular Weight	136.09 g/mol
Chemical Structure	Potassium salt of orthophosphoric acid, anhydrous
Appearance	White crystalline powder or granules
Solubility	Freely soluble in water (22g/100mL at 20℃), slightly soluble in ethanol
pH Value (1% aqueous solution, 25℃)	4.2 ~ 4.7
Available Grade	Food Grade, Feed Grade, Industrial Grade
Executive Standard	FCC, E 340(i), GB 25560 (China Food Additive Standard)
Certifications	ISO9001, HALAL, KOSHER, REACH
Core Functions	pH buffer, acidity regulator, formulation stabilizer, mineral supplement

Product Overview

Monopotassium Phosphate (MKP) is a high-purity potassium orthophosphate salt with excellent water solubility and stable chemical properties. It is widely used as a pH buffer and acidity regulator in food formulations to stabilize acidity and maintain consistent texture and quality of beverages, dairy products, sauces and baked goods.

In food systems, MKP helps resist sharp pH changes during thermal processing, storage and ingredient addition, preventing protein precipitation, separation and flavor fluctuation. It also serves as a mineral source of phosphorus and potassium for food and feed applications.

Beyond food use, MKP is known as a highly water-soluble phosphorus and potassium nutrient source for agricultural fertigation and hydroponic cultivation. In industrial applications, it functions as a buffering agent for water treatment and other process systems.

Character

Monopotassium Phosphate is a white crystalline powder or granular solid, odorless, readily soluble in water to form slightly acidic aqueous solutions. It has good thermal stability and low hygroscopicity under normal storage conditions.

As a monobasic potassium phosphate, it provides effective pH buffering capacity in the weakly acidic range. It is compatible with most food ingredients and feed raw materials, with low heavy metal and impurity content meeting corresponding food and feed safety specifications.

Main Functions

1.pH Buffer / Acidity Regulator : Stabilize pH value in food and beverage formulations, resist sharp pH changes during processing and storage, prevent precipitation and separation, and maintain consistent product quality.

2.Formulation Stabilizer Improve physical stability and texture of processed food systems, support emulsification and dispersion of ingredients.

3.Mineral Supplement Supply phosphorus and potassium as nutritional mineral source in food and feed applications.

4.Plant Nutrient Source Serve as a water-soluble phosphorus and potassium source for agricultural fertigation and hydroponic systems.

Applications

1.Food Formulations Used in beverages, dairy products, sauces, dressings and baked goods as a pH buffer and acidity regulator to maintain stable acidity, prevent protein coagulation and ensure consistent flavor and texture.

2.Animal Feed Added to compound feed as a phosphorus and potassium mineral supplement for livestock, poultry and aquaculture.

3.Industrial Applications Applied in water treatment, laboratory buffers and other industrial systems requiring precise pH control.

4.Agriculture & Hydroponics Used as a soluble phosphorus and potassium source for fertigation, foliar application and hydroponic nutrient solutions.

Packaging & Storage

Packaging: 25kg kraft paper bag with inner PE liner, 1000kg jumbo bag, customized packaging available.

Storage: Store in cool, dry, ventilated warehouse, keep bags sealed to avoid moisture absorption and contamination.

Shelf Life: 24 months under proper storage conditions.

Index	Food grade
Content(KH2PO4 )%≥	98.0
Phosphorus pentoxide(P2O5)%≥	51.50
Oxide(K2O)%≥	34.0
PH value	4.4-4.8
Moisture %≤	0.2
Heavy metal(Pb)%≤	0.001
Arsenic(As)%≤	0.0003
Fluoride(F)%≤	0.005
Water-insoluble %≤	0.10

Monopotassium Phosphate MKP Feed Grade

Parameters	Unit	Standard
Main Contents ( KH₂PO₄ in dry basis)	% ≥	98.0
KH₂PO₄ (Calculated as P)	% ≥	22.3
KH₂PO₄ (Calculated as K in dry basis)	% ≥	28.0-32.0
Moisture	% ≤	0.2
pH	10g/l	4.3-4.7
Water Insoluble	% ≤	0.2
Sulphate (as S O₄ )	% ≤	0.5
Loss on drying	% ≤	0.5
Arsenic	≤mg/kg	10.00
Chromium	≤mg/kg	30.00
Plumbum	≤mg/kg	30.00
Fluoride	≤mg/kg	200.00

Product Name:	Monopotassium phosphate	Other Name:	Phosphoric acid,potassium salt (1:1);Phosphoric acid,monopotassium salt;Monopotassium phosphate;Potassium acid phosphate;Potassium biphosphate;Potassium dihydrogen phosphate;Sorensen’s potassium phosphate;Monopotassium orthophosphate;Potassium phosphate (K(H2PO4));Potassium dihydrogen phosphate (KH2PO4);KDP;Monobasic potassium phosphate;Monopotassium dihydrogen phosphate;Dihydrogen potassium phosphate;Potassium dihydrogen orthophosphate;Potassium hydrogen phosphate (KH2PO4);Potassium diphosphate;Potassium monobasic phosphate (KH2PO4);Potassium phosphate monobasic;Nutri-Vant-PeaK;Monopotassium dihydrogen orthophosphate;MKP;Hydrogen potassium phosphate (H2KPO4);943540-09-8;1364712-44-6;2133444-20-7;2364332-00-1;2484993-14-6
CAS No.:	7778-77-0	Molecular Formula:	H3O4P.K
InChIKeys:	InChIKey=PJNZPQUBCPKICU-UHFFFAOYSA-N	Molecular Weight:	136.09
Exact Mass:	135.932770	EC Number:	231-913-4
UNII:	4J9FJ0HL51	ICSC Number:	1608
DSSTox ID:	DTXSID0035667	Color/Form:	Colorless crystals or white granular powder\|White tetragonal crystals
HScode:	28352400	Categories:	Food Flavorings

PSA:	80.6	XLogP3:	-0.49040
Appearance:	White transparent powder	Density:	3″>2.34 g/cm3
Melting Point:	253 °C	Boiling Point:	158ºC at 760 mmHg
Refractive Index:	Index of refraction: 1.5093, 1.4682, both at 589 nm	Water Solubility:	H2O: 222 g/L (20 ºC)
Storage Conditions:	Store at RT.	Toxicity:	4640mg/kg”>LD50 skin in rabbit: > 4640mg/kg
Odor:	Odorless	PH:	Between 4,2 and 4,8 (1 % solution)
Experimental Properties:	Permanent in air. At 400 °C loses water, forming metaphosphate\|pH = 4.5 (1% aqueous solution). Forms ferroelectric crystals (Critical temperature = -151 °C)\|At ordinary temperatures, monopotassium phosphate is so far above its Curie point as to give piezoelectric effects in which the emf is proportional to the distorting force. There is virtually no hysteresis.\|Curie point: 123 K; Spontaneous polarization: 4.7 uC/cu cm at 110 K	Critical Temperature & Pressure:	Critical temperature = -151 °C

Classification of the substance or mixture

Not classified.

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)	No symbol.
Signal word	No signal word
Hazard statement(s)	none
Prevention	none
Response	none
Storage	none
Disposal	none

Other hazards which do not result in classification

no data available

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Separated from strong bases.Store at 20 to 25 deg C (68 to 77 deg F); excursions permitted to 15 to 30 deg C (59 to 86 deg F).