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HomeProduct name listPotassium Acetate

Potassium Acetate

Synonym(s):Acetic Acid, Potassium Salt, Acetic Acid;Potassium acetate;Potassium Acetate, Molecular Biology Grade - CAS 127-08-2 - Calbiochem

  • CAS NO.:127-08-2
  • Empirical Formula: C2H3KO2
  • Molecular Weight: 98.14
  • MDL number: MFCD00012458
  • EINECS: 204-822-2
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2025-01-27 09:38:02
Potassium Acetate Structural

What is Potassium Acetate?

Description

Potassium acetate (CH3CO2K) is the potassium salt of acetic acid. It is generally used as an acidity regulator, buffer, preservative and firming agent.

Chemical properties

Potassium acetate, KC2H302, is a white, deliquescent solid, soluble in water and alcohol, insoluble in ether, that melts at 292°C. It is odorless or has a faint acetic odor and a saline taste. It is used as an analytical reagent, dehydrating agent, in medicine, and in crystal glass manufacture.

The Uses of Potassium Acetate

Potassium acetate is used in the manufacture of glass; as a softening agent for papers and textiles; as a dehydrating agent; and as a buffer. In medicine it is used as an expectorant and diuretic. In the food industry it is used as a food additive, an acidity regulator and a preservative. Potassium acetate is used as diuretic and urinary alkaliser, and acts by changing the physical properties of the body fluids and by functioning as an alkali after absortion.

Indications

Potassium is used to regulate hypokalemia as a primary condition or secondary to other medical conditions.

Definition

ChEBI: A potassium salt comprising equal numbers of potassium and acetate ions

Preparation

Potassium acetate is prepared by addition of potassium carbonate in a small volume of water to acetic acid solution, followed by evaporation and crystallization:
K2CO3+ 2CH3COOH →2CH3COOK + H2O

Properties of Potassium Acetate

Melting point: 292 °C
Density  1.57 g/cm3 at 25 °C (lit.)
refractive index  n20/D 1.370
FEMA  2920 | POTASSIUM ACETATE
Flash point: >250℃
storage temp.  room temp
solubility  H2O: 1 M at 20 °C, clear, colorless
form  Solid
appearance White powder
pka 4.756[at 20 ℃]
Specific Gravity 1.57
color  White to light brown
Odor Odorless
PH Range 7 - 9 at 98.2 g/l at 25 °C
PH 7.87(1 mM solution);8.33(10 mM solution);8.75(100 mM solution);9.06(1000 mM solution)
Water Solubility  2694 g/L (25 ºC)
Sensitive  Hygroscopic
λmax λ: 260 nm Amax: 0.04
λ: 280 nm Amax: 0.02
Hydrolytic Sensitivity 0: forms stable aqueous solutions
Merck  14,7605
BRN  3595449
Stability: Deliquescent. Stable. Incompatible with strong oxidizing agents.
CAS DataBase Reference 127-08-2(CAS DataBase Reference)
NIST Chemistry Reference Potassium acetate(127-08-2)
EPA Substance Registry System Potassium acetate (127-08-2)

Safety information for Potassium Acetate

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H303:Acute toxicity,oral
Precautionary Statement Codes P270:Do not eat, drink or smoke when using this product.
P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P403+P233:Store in a well-ventilated place. Keep container tightly closed.

Computed Descriptors for Potassium Acetate

InChIKey SCVFZCLFOSHCOH-UHFFFAOYSA-M

Potassium Acetate manufacturer

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