Home > Potassium hydroxide

**Properties**
General
Name	Potassium hydroxide
Chemical formula	K OH
Appearance	White solid
Physical
Formula weight	56.1 amu
Melting point	679 K (406 °C)
Boiling point	1593 K (1320 °C)
Density	2.0 ×10³ kg/ m³
Crystal structure	?
Solubility	119 gFor other meanings of gram see gram (disambiguation). The gram (also spelt gramme is a unit of measurement of mass, and is defined in the SI system of units as one thousandth of a kilogram. See 1 E -3 kg for comparisons with other masses. The symbol for g in 100g water
Thermochemistry
Δ_fH⁰_gasThe standard enthalpy of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of that substance from its component elements, at their standard states (the most stable form of the element or compound at 25 degrees Cels	-232 kJThe joule (symbol J also called newton metre or coulomb volt is the SI unit of energy and work. The unit is pronounced to rhyme with "tool", and is named in honour of the physicist James Prescott Joule (1818-1889). 1 joule 1 N · 1 m 1 newton · 1 metre 1 k/ molThe mole (symbol: mol) is one of the seven SI base units and is commonly used in chemistry. It measures the amount of substance of a system and is defined as the amount of substance that contains as many elementary entities as there are atoms in exactly 0
Δ_fH⁰_liquidThe standard enthalpy of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of that substance from its component elements, at their standard states (the most stable form of the element or compound at 25 degrees Cels	-415.6 kJThe joule (symbol J also called newton metre or coulomb volt is the SI unit of energy and work. The unit is pronounced to rhyme with "tool", and is named in honour of the physicist James Prescott Joule (1818-1889). 1 joule 1 N · 1 m 1 newton · 1 metre 1 k/ molThe mole (symbol: mol) is one of the seven SI base units and is commonly used in chemistry. It measures the amount of substance of a system and is defined as the amount of substance that contains as many elementary entities as there are atoms in exactly 0
Δ_fH⁰_solid	-425 kJ/ mol
S⁰_solid	79 J/ mol· K
Safety
Ingestion	Very dangerous, may cause permanent GI damage, even death.
Inhalation	Very dangerous, high doses may cause serious injury. Long-term hazards also known.
Skin	Causes burns, ranging from a rash up to deep ulcers.
Eyes	As for skin, may cause irreversible damage.
More info	Hazardous Chemical Database
SI units were used where possible. Unless otherwise stated, standard conditions were used. Disclaimer and references

Properties

General

Name

Potassium hydroxide

Chemical formula

K OH

Appearance

White solid

Physical

56.1 amu

679 K (406 °C)

1593 K (1320 °C)

2.0 ×10³ kg/ m³

119 gFor other meanings of gram see gram (disambiguation). The gram (also spelt gramme is a unit of measurement of mass, and is defined in the SI system of units as one thousandth of a kilogram. See 1 E -3 kg for comparisons with other masses. The symbol for g in 100g water

Thermochemistry

Δ_fH⁰_gasThe standard enthalpy of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of that substance from its component elements, at their standard states (the most stable form of the element or compound at 25 degrees Cels

-232 kJThe joule (symbol J also called newton metre or coulomb volt is the SI unit of energy and work. The unit is pronounced to rhyme with "tool", and is named in honour of the physicist James Prescott Joule (1818-1889). 1 joule 1 N · 1 m 1 newton · 1 metre 1 k/ molThe mole (symbol: mol) is one of the seven SI base units and is commonly used in chemistry. It measures the amount of substance of a system and is defined as the amount of substance that contains as many elementary entities as there are atoms in exactly 0

Δ_fH⁰_liquidThe standard enthalpy of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of that substance from its component elements, at their standard states (the most stable form of the element or compound at 25 degrees Cels

-415.6 kJThe joule (symbol J also called newton metre or coulomb volt is the SI unit of energy and work. The unit is pronounced to rhyme with "tool", and is named in honour of the physicist James Prescott Joule (1818-1889). 1 joule 1 N · 1 m 1 newton · 1 metre 1 k/ molThe mole (symbol: mol) is one of the seven SI base units and is commonly used in chemistry. It measures the amount of substance of a system and is defined as the amount of substance that contains as many elementary entities as there are atoms in exactly 0

Δ_fH⁰_solid

-425 kJ/ mol

S⁰_solid

79 J/ mol· K

Safety

Ingestion

Very dangerous, may cause permanent GI damage, even death.

Inhalation

Very dangerous, high doses may cause serious injury. Long-term hazards also known.

Skin

Causes burns, ranging from a rash up to deep ulcers.

Eyes

As for skin, may cause irreversible damage.

More info

Hazardous Chemical Database

SI units were used where possible. Unless otherwise stated, standard conditions were used.

Disclaimer and references

The chemical compound potassium hydroxide, ( K OH) sometimes known as caustic potash, potassa, potash lye and potassium hydrate, is a metallic base . It is a very alkaline compound used in agriculture to correct the pH of acidic soils. It can also be used as a fungicide or even an herbicide.

Uses

It is a major industrial chemical used as a base in a wide variety of chemical processes.

It is used as a catalyst in reactions like the production of biodiesel, the advantage of using KOH and not NaOH is that NaOH "clumps" and KOH doesn't.

Some uses of KOH include acrylate ester copolymer coating, defoaming agents used in the manufacture of paper, formulation aid for food, pH control agent, polyethylene resins, textile processing.

Food uses include washing or chemical peeling of fruits and vegetables, chocolate and cocoa processing, caramel color production, poultry scalding, and forming a skin on pretzels before baking, olive aging, soft drink processing, ice cream thickener.

Other uses include in veterinary medicine in disbudding calves horns and to dissolve scales and hair; manufacture of cleansers; in wart removal and as a cuticle solvent. This type of compound is also used in washing powders, some denture cleaners, non-phosphate detergents, and drain or pipe cleaners.

It is also a traditional ingredient in the making of soap, and for this purpose was historically obtained in an impure form by steeping wood ash in water for a long period.

Bases

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Topics: Potassium Hydroxide, Potassium Ferrocyanide, Potassium Nitrate...

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