Description References
ChemicalBook > CAS DataBase List > Dipotassium hydrogen phosphate trihydrate

Dipotassium hydrogen phosphate trihydrate

Description References
Product Name
Dipotassium hydrogen phosphate trihydrate
CAS No.
16788-57-1
Chemical Name
Dipotassium hydrogen phosphate trihydrate
Synonyms
POTASSIUM HYDROGEN PHOSPHATE;Dipotassium Phosphate Trihydrate;KH2PO5;POTASSIUM PHOSPHATE 3H2O;PotassiumPhosphateDibasicAr;POTASSIUM PFAT 2BAS 3HYD XTL;di-Potassiumhydrogenphosphat;potassiumphosphate,trihydrate;Dibasic PotassiuM Phosphate (AS);Dipotassium Phosphate Trihydrtae
CBNumber
CB4470368
Molecular Formula
H7K2O7P
Formula Weight
228.22
MOL File
16788-57-1.mol
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Dipotassium hydrogen phosphate trihydrate Property

Melting point:
340°C(anhydrous substance),decomposes
bulk density
800kg/m3
storage temp. 
room temp
solubility 
H2O: 4 M at 20 °C, clear, colorless
pka
7.21
form 
Crystalline Powder
color 
White
PH
9.1-9.4 (25℃, 50mg/mL in H2O)
Water Solubility 
SOLUBLE
Sensitive 
Hygroscopic
Merck 
14,7658
Stability:
Stable. Incompatible with strong oxidizing agents.
InChIKey
XQGPKZUNMMFTAL-UHFFFAOYSA-L
CAS DataBase Reference
16788-57-1(CAS DataBase Reference)
Absorption
≤0.01 at 260nm
≤0.01 at 280nm
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Safety

Safety Statements 
24/25
WGK Germany 
3
TSCA 
Yes
HS Code 
28352400
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
P5504
Product name
Potassium phosphate dibasic trihydrate
Purity
ReagentPlus , ≥99.0%
Packaging
1kg
Price
$243
Updated
2025/07/31
Sigma-Aldrich
Product number
1.05099
Product name
di-Potassium hydrogen phosphate trihydrate
Purity
for analysis EMSURE?
Packaging
250g
Price
$136
Updated
2025/07/31
Sigma-Aldrich
Product number
60349
Product name
Potassium phosphate dibasic trihydrate
Purity
puriss. p.a., ≥99.0% (T)
Packaging
250g
Price
$167
Updated
2025/07/31
Sigma-Aldrich
Product number
529567-M
Product name
Potassium Phosphate, Dibasic, Trihydrate, Molecular Biology Grade - CAS 16788-57-1 - Calbiochem
Packaging
1kg
Price
$285
Updated
2025/07/31
Sigma-Aldrich
Product number
1.05099
Product name
di-Potassium hydrogen phosphate trihydrate
Purity
for analysis EMSURE?
Packaging
1kg
Price
$338
Updated
2025/07/31
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Dipotassium hydrogen phosphate trihydrate Chemical Properties,Usage,Production

Description

Dipotassium hydrogen phosphate trihydrate (K2HPO4•3H2O) is the dipotassium form of phosphoric acid, which can be highly soluble in water. It is widely applied in the fields of food, agriculture and molecular biology etc. It is commonly used as a food additive, involved in the formation of dairy creamers, dry powder beverages. In addition, as a source of phosphorus and potassium, it is allowed to be used as a electrolyte replenisher, providing minerals especially for athletes, which play an essential role in the recovery of muscles. It can also serves as a fertilizer to increase in rice grain yield. Besides, it has application in molecular biology and biochemistry, which is useful to increase the partition coefficients of amino acids in aqueous two-phase systems. Besides, It has been proved that Dipotassium hydrogen phosphate has radio-protective activity, which is able to block the uptake of the radioactive isotope P-32 upon oral administration.

References

https://en.wikipedia.org/wiki/Dipotassium_phosphate
https://www.alfa.com/zh-cn/catalog/011593/
https://www.exercise.com/supplements/dipotassium-phosphate
https://pubchem.ncbi.nlm.nih.gov/compound/Dipotassium_hydrogen_phosphate#section=Top

Chemical Properties

crystalline solid

Uses

Potassium hydrogen phosphate trihydrate is widely used to prepare buffer solutions in molecular biology, biochemistry and chromatography. It is involved in the production of trypticase soy agar and then utilized for culturing bacteria. As a food additive, it is used in dry powder beverages, mineral supplements and imitation dairy creamers. It is also used as a stabilizer for non-dairy coffee creamers. Further, it is a common source of phosphorous and potassium.

Application

Dipotassium hydrogen phosphate trihydrate can be used to:
As a corrosion inhibitor. Dipotassium hydrogen phosphate forms a passivation film on the metal in alkaline solutions with low chloride contamination, which slows down the corrosion of carbon steel[1].
As a catalyst. Dipotassium hydrogen phosphate powder catalyses the conversion of stable phosphoryl compounds to dialkyl (E, Z)-2-(1-acetyl-2-naphthalenyl)-2-butenedioate under thermal and microwave conditions in a solvent-free system[2].
As a reducing agent. Dipotassium hydrogen phosphate (K2HPO4.3H2O) was used for the efficient reduction of graphene oxide nanosheets. Dipotassium hydrogen phosphate itself and the prepared graphene are environmentally friendly and cheap[3].
As a nutrient. Used as a nutrient in antimicrobial media.

General Description

Potassium phosphate dibasic trihydrate (K2HPO4.3H2O, Dipotassium hydrogen phosphate trihydrate, Dipotassium phosphate, di-Potassium hydrogen phosphate trihydrate) is the potassium salt having a pH in the range of 9.1-9.4.

References

[1] A. MOHAGHEGHI; R. A. Corrosion inhibition of carbon steel by dipotassium hydrogen phosphate in alkaline solutions with low chloride contamination[J]. Construction and Building Materials, 2018. DOI:10.1016/j.conbuildmat.2018.07.181.
[2] A. SOULDOZI; N. N; A Ramazani. Dipotassium Hydrogen Phosphate Powder Catalyzed Stereoselective O-Vinylation of 1-(2-Hydroxy-1-naphthyl)-1-ethanone[J]. Phosphorus Sulfur and Silicon and The Related Elements, 2006. DOI:10.1080/10426500500326578.
[3] XINMENG ZHANG. Dipotassium hydrogen phosphate as reducing agent for the efficient reduction of graphene oxide nanosheets[J]. Journal of Colloid and Interface Science, 2013. DOI:10.1016/j.jcis.2013.07.021.

Dipotassium hydrogen phosphate trihydrate Preparation Products And Raw materials

Raw materials

Preparation Products

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View Lastest Price from Dipotassium hydrogen phosphate trihydrate manufacturers

WUHAN FORTUNA CHEMICAL CO., LTD
Product
Dipotassium hydrogen phosphate trihydrate 16788-57-1
Price
US $0.00/KG
Min. Order
1KG
Purity
98%min
Supply Ability
30tons/month
Release date
2023-01-10
Hebei Fengjia New Material Co., Ltd
Product
Dipotassium hydrogen phosphate trihydrate 16788-57-1
Price
US $30.00/kg
Min. Order
1kg
Purity
0.99
Supply Ability
100
Release date
2024-08-16
Hebei Chuanghai Biotechnology Co., Ltd
Product
Dipotassium hydrogen phosphate trihydrate 16788-57-1
Price
US $10.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
100 mt
Release date
2024-11-01

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