Potassium dihydrogen phosphate

Basic Information

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CAS Number

7778-77-0

Molecular Formula

H2KO4P

Molecular Weight

136.09 g/mol

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Carboxylic Acids

Agricultural Chemicals Pesticides Insecticides

Water Treatment Chemicals Coagulants and Flocculants Inorganic Coagulants

Basic Physical Properties

Melting Point

252.6 °C

Boiling Point

158 °C at 760 mmHg

Density

2.338 g/mL at 25 °C

Water Solubility

222 g/L (20 ºC)

Solubility

H2O: 1.5 M at 20 °C, clear, colorless

Refractive Index

Index of refraction: 1.5093, 1.4682, both at 589 nm

SMILES

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OP(=O)(O)[O-].[K+]

InChI

InChI=1S/K.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1

InChIKey

GNSKLFRGEWLPPA-UHFFFAOYSA-M

LogP

-0.49040

pKa

(1) 2.15, (2) 6.82, (3) 12.38 (at 25℃)

Complexity

61.9

Safety Information

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Hazard Statement

H315 Causes skin irritation
Skin corrosion/irritation

H319 Causes serious eye irritation
Serious eye damage/eye irritation

H335 May cause respiratory irritation
Specific target organ toxicity, single exposure; Respiratory tract irritation

Sensitiveness

Hygroscopic

Synonyms & References

English

Potassium dihydrogen phosphate
BUFFER CONCENTRATE II FROM POTASSIUM DIHYDROGEN PHOSPHATE
DIPOTASSIUM HYDROGEN PHOSPHATE
KALII DIHYDROGENOPHOSPHAS
MKP
MONOBASIC POTASSIUM PHOSPHATE
MONO-POTASSIUM
MONOPOTASSIUM PHOSPHATE
PHOSPHATE, ANALYTICAL STANDARD
PHOSPHATE HIGH
PHOSPHATE ION CHROMATOGRAPHY STANDARD
PHOSPHATE LOW NO 1
PHOSPHATE LOW NO 2
PHOSPHATE SINGLE COMPONENT STANDARD
PHOSPHATE STANDARD SOLUTION
POTASSIUM ACID PHOSPHATE
POTASSIUM BIPHOSPHATE
POTASSIUM DIHYDROGEN ORTHOPHOSPHATE
POTASSIUM DIHYDROGEN PHOSPHATE CONCENTRATE II
POTASSIUM DIHYDROGEN PHOSPHATE (MONOBASIC)
Feed grade monopotassium phosphate (feed MKP)
Phosphoric Acid Potassium
Potassium dihydrogen orthophosphate(V)
POTASSIUM DIHYDROGEN PHOSPHATE, MOLECULAR BIOLOGY GRADE
Potassium dihydrogen phosphate,agricultural
Potassium phosphate monobasic
Potassiumphosphate
POTASSIUM PHOSPHATE, MONOBASIC, ANHYDROUS
Monobasic PotassiuM Phosphate (AS)
MonopotassiuM phosphate
Potassium phosphate

MDL Number

MFCD00011401

FAQ

What is Potassium dihydrogen phosphate (CAS: 7778-77-0)?

Potassium dihydrogen phosphate (CAS: 7778-77-0), also known as KH₂PO₄, is a white crystalline inorganic compound. It is highly soluble in water and commonly used as a buffer in various applications. This compound has a low pH due to its acidic nature and is often employed in chemical analysis. It is stable under normal conditions and is a key component in many industrial and laboratory processes.

What are the main uses of Potassium dihydrogen phosphate (CAS: 7778-77-0)?

Potassium dihydrogen phosphate (CAS: 7778-77-0) is widely used in pharmaceuticals, food additives, and industrial applications. It serves as a buffering agent in drug formulations and is found in food as a leavening agent. It is also used in agriculture for soil pH regulation and in research for preparing phosphate solutions. Its versatility makes it essential in multiple sectors.

Is Potassium dihydrogen phosphate (CAS: 7778-77-0) safe?

Potassium dihydrogen phosphate (CAS: 7778-77-0) is generally considered safe when handled properly. It is non-toxic in small amounts but may cause skin or eye irritation upon contact. Safety standards recommend avoiding inhalation and ingestion. Protective measures include wearing gloves and goggles. It is safe for use in food and pharmaceuticals when within regulated limits.

How should Potassium dihydrogen phosphate (CAS: 7778-77-0) be stored?

Potassium dihydrogen phosphate (CAS: 7778-77-0) should be stored in a cool, dry, and well-ventilated area. It is stable under normal conditions but should be kept away from moisture and strong acids. Store in a sealed container to prevent contamination. Avoid direct light exposure to maintain its chemical integrity. Proper storage ensures longevity and safety.