Dipotassium phosphate

Dipotassium phosphate
Dipotassium phosphate
CAS number 7758-11-4 YesY
PubChem 24450
ChemSpider 22858 YesY
Jmol-3D images Image 1
Molecular formula K2HPO4
Molar mass 174.2 g/mol
Appearance white powder
Odor odorless
Density 2.44 g/cm3
Melting point

>465 °C decomp.

Solubility in water 149.25 g/100 mL (20 °C)
Solubility slightly soluble in alcohol
Acidity (pKa) 12.4
Basicity (pKb) 6.8
EU Index Not listed
NFPA 704
NFPA 704.svg
Flash point Non-flammable
Related compounds
Other cations Disodium phosphate
Diammonium phosphate
Related compounds Monopotassium phosphate
Tripotassium phosphate
 YesY (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Dipotassium phosphate (K2HPO4) - also phosphoric acid, dipotassium salt; dipotassium hydrogen orthophosphate; potassium phosphate, dibasic - is a highly water-soluble salt which is often used as a fertilizer, food additive and buffering agent. It is a common source of phosphorus and potassium.

The pH of a dipotassium phosphate solution is almost neutral. It is formed by the stoichiometric neutralization of phosphoric acid with potassium hydroxide:

H3PO4 + 2 KOH → K2HPO4 + 2 H2O

It reacts with phosphoric acid to generate monopotassium phosphate:

K2HPO4 + H3PO4 → 2 KH2PO4


As a food additive, Dipotassium phosphate is on the FDA's Generally recognized as safe, or GRAS, list of substances[1]. It is used in non-dairy creamers to prevent coagulation.[2]


  1. ^ "Database of Select Committee on GRAS Substances (SCOGS) Reviews". http://www.cfsan.fda.gov/~dms/opascogd.html. Retrieved 2008-03-22.  (listed as potassium phosphate, dibasic)
  2. ^ "dipotassium phosphate". http://everything2.com/e2node/dipotassium%2520phosphate. Retrieved 2009-01-06.  (uses: Food Industry)

Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • dipotassium phosphate — SYN: potassium phosphate. * * * di·po·tas·si·um phos·phate (di″po tasґe əm) dibasic potassium phosphate; see under potassium …   Medical dictionary

  • dibasic potassium phosphate — [USP] the dipotassium salt, K2HPO4; used alone or in combination with other phosphate compounds as an electrolyte replenisher, administered orally or intravenously. Called also dipotassium phosphate …   Medical dictionary

  • Disodium phosphate — IUPAC name Sodium hydrogen phosphate …   Wikipedia

  • Monopotassium phosphate — IUPAC name Potassium dihydrogen phosphate …   Wikipedia

  • Diammonium phosphate — Diammonium phosphate[1] IUPAC name …   Wikipedia

  • Potassium phosphate — is a generic term for the salts of potassium and phosphate ions including: * Monopotassium phosphate (KH2PO4) * Dipotassium phosphate (K2HPO4) * Tripotassium phosphate (K3PO4)As food additives, potassium phosphates have the E number E340.ee… …   Wikipedia

  • E number — This article is about the food additive codes. For other uses, see E number (disambiguation). E numbers are number codes for food additives that have been assessed for use within the European Union (the E prefix stands for Europe ).[1] They are… …   Wikipedia

  • Список пищевых добавок E300-E399 — E300 E399 Пищевые добавки. Группа антиоксидантов, регуляторов кислотности. Индекс Название вещества Английское название E300 Аскорбиновая кислота (Витамин C) Ascorbic acid (Vitamin C) E301 …   Википедия

  • Список пищевых добавок E300 — Эта статья или раздел описывает ситуацию применительно лишь к одному региону. Вы можете помочь Википедии, добавив информацию для других стран и регионов. E300 E399 …   Википедия

  • Е300-Е399 — Пищевые добавки Пищевые красители E1xx | Консерванты E2xx | Антиокислители и регуляторы кислотности E3xx | Стабилизаторы, загустители и эмульгаторы E4xx | Регуляторы рН и вещества против слёживания E5xx | Усилители вкуса и аромата, ароматизаторы… …   Википедия

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”