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Potassium hydroxide
Cas No: 1310-58-3
No Data 22 Metric Ton 200 Metric Ton/Day Xinxiang Yellow River Fine Chemical Industry Co., Ltd. Contact Supplier
Potassium hydroxide
Cas No: 1310-58-3
No Data 25000 Kilogram 1000 Metric Ton/Month Jiaxing Barton Chemicals Contact Supplier
Potassium hydroxide
Cas No: 1310-58-3
USD $ 3.0-3.0 / Kilogram 1 Kilogram 1-100 Metric Ton/Month Hangzhou Dayangchem Co., Ltd. Contact Supplier
Potassium hydroxide//1310-58-3
Cas No: 1310-58-3
No Data 1 Kilogram 200 Metric Ton/Month Hefei TNJ chemical industry co.,ltd Contact Supplier
Potassium hydroxide
Cas No: 1310-58-3
No Data 5 Metric Ton 500 Metric Ton/Month UNION PHARMPRO CO.,LTD Contact Supplier
Potassium hydroxide
Cas No: 1310-58-3
No Data 1 Kilogram 1 Metric Ton/Quarter Henan Allgreen Chemical Co.,Ltd Contact Supplier
High quality Potassium Hydroxide supplier in China
Cas No: 1310-58-3
No Data No Data No Data Simagchem Corporation Contact Supplier
factory provide high quality Potassium Hydroxide
Cas No: 1310-58-3
USD $ 870.0-910.0 / Metric Ton 1 Metric Ton 5000 Metric Ton/Month Jiangsu Kolod Food Ingredients Co.,Ltd Contact Supplier
Potassium hydroxide CAS.1310-58-3
Cas No: 1310-58-3
No Data 1 Kilogram 1000 Metric Ton/Week Crovell Biotech (Hebei) Co., Ltd. Contact Supplier
Potassium hydroxide
Cas No: 1310-58-3
USD $ 850.0-850.0 / Kilogram 50 Kilogram 1 Metric Ton/Month Chengdu Yanxi Import & Export Trading CO.,LTD Contact Supplier

1310-58-3 Usage


Potassium hydroxide is a very strong base, more basic than caustic soda. It is neutralized by acids. The solution on evaporation yields the corresponding potassium salt:
KOH + HCl → K+ + Cl¯+ H2O
Action of bromine or iodine on a warm concentrated solution of KOH forms bromate and bromide or iodate and iodide, respectively:
3Br2 + 6OH¯→ BrO3¯ + 5Br¯ + 3H2O
3I2 + 6OH¯ → IO3¯ + 5I¯ + 3H2O
When carbon dioxide is passed through its aqueous solution and the solution evaporated, potassium bicarbonate is formed:
Reaction with carbon monoxide at 100 to 200°C at a CO pressure above 7 atm yields potassium formate:
Reaction with phenol in dilute methanol solution forms potassium phenoxide:
KOH + C6H5OH → C6H5OK + H2O
Reaction with boric acid and hydrofluoric acid forms potassium tetrafluoroborate, KBF4:
KOH + H3BO3 + 4HF → KBF4 + 4H2O
An alcoholic solution of potassium hydroxide reacts with an alcoholic solution of carbon disulfide to form potassium ethylxanthogenate, C2H5OCS2K
KOH + C2H5OH + CS2 → C2H5OCS2K + H2O
Reaction with sodium borohydride forms potassium borohydride:
Reaction with hydrofluoric acid forms potassium bifluoride:
KOH + 2HF → KHF2 + H2O
Half neutralization of a phthalic anhydride solution forms potassium hydrogen phthalate.

Purification Methods

Its carbonate content can be reduced by rinsing KOH sticks rapidly with water prior to dissolving them in boiled out distilled water. Alternatively, a slight excess of saturated BaCl2 or Ba(OH)2 can be added to the solution which, after shaking well, is set aside so that the BaCO3 is allowed to separate out. Davies and Nancollas [Nature 165 237 1950] rendered KOH solutions carbonate free by ion exchange using a column of Amberlite IR-100 in the OH-form.


Potassium hydroxide(KOH) is highly basic, forming strongly alkaline solutions in water and other polar solvents. These solutions are capable of deprotonating many acids, even weak ones.
Potassium hydroxide is used to make soft soap, in scrubbing and cleaning operations, as a mordant for woods, in dyes and colorants, and for absorbing carbon dioxide. Other principle uses of caustic potash are in the preparation of several potassium salts, acid-base titrations, and in orgainic sytheses.
Also, KOH is an electrolyte in certain alkaline storage batteries and fuel cells. Potassium hydroxide is used in neutralization reactions to yield potassium salts. Aqueous potassium hydroxide is employed as the electrolyte in alkaline batteries based on nickel-cadmium and manganese dioxide-zinc. Alcoholic KOH solutions are also used as an effective method for cleaning glassware. KOH works well in the manufacture of biodiesel by catalyzing transesterification of the triglycerides in vegetable oil.


Pharmaceutic aid (alkalizing agent).

Health Hazard

Causes severe burns of eyes, skin, and mucous membranes.
Potassium hydroxide is a strongly alkaline, hydrophilic substance and therefore solid potassium hydroxide is highly corrosive. It reacts with fat and can cause irreversible damage to any site of contact with the body (for example skin or eyes). Solutions of potassium hydroxide in water at concentrations above 0.5% (w/w) are irritating at points of contact and, at higher concentrations, the solutions can be corrosive. Potassium hydroxide does not cause skin allergies. Because of the corrosive properties of potassium hydroxide, its ingestion can be fatal. Under normal conditions of handling and use, potassium hydroxide in solution will dissociate into its constituent ions and, if ingested, will not be systemically available in the body as such.

Chemical Properties

Pure potassium hydroxide is a solid at room temperature, though it is often sold as a liquid. Potassium hydroxide is a strong alkaline substance that dissociates completely in water into the potassium ion (K+) and hydroxide ion (OH-). The dissolution in water generates heat, so a vigorous reaction can occur when potassium hydroxide is added to water. The vapor pressure of the substance is very low and the melting point is high. Potassium hydroxide solutions attack aluminium and its alloys under formation of hydrogen gas. It can be neutralised with acids (e.g. hydrochloric acid) giving the corresponding potassium salts of the acids, which are usually pH neutral and non-corrosive.

Fire Hazard

Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.

Production Methods

Potassium hydroxide is produced commerically by electrolysis of a saturated solution of potassium chloride in brine using mercury cells consisting of a titanium anode and mercury cathode. Potassium reacts with mercury forming the amalgam which, on treatment with water, forms potassium hydroxide and hydrogen.
Other types of electrolytic cells, although not so commonly used today, are also known. In a diaphragm type cell that separates the cell into anode and cathode compartments, an aqueous solution of potassium chloride is electrolyzed. Potassium hydroxide and hydrogen are produced at the cathode and chlorine is liberated at the anode. The solution discharged from the cell is evaporated to concentrate potassium hydroxide and precipitate potassium chloride.
Potassium hydroxide also may be made by reacting potassium superoxide with water:
2KO2 + 2H2O → 2KOH + H2O2 + O2


Potassium hydroxide has many different functions and uses.
  1. It is primarily used as an intermediate in industrial manufacturing processes, such as the manufacture of fertilisers, potassium carbonate or other potassium salts and organic chemicals.
  2. It is also used in the manufacture of detergents and in alkaline batteries.
  3. Small-scale uses include drain cleaning products, paint removers and degreasing agents.
  4. manufacture of liquid soap;
  5. mordant for wood;
  6. absorbing CO2;
  7. mercerizing cotton;
  8. paint and varnish removers;
  9. electroplating, photoengraving and lithography;
  10. printing inks;
  11. in analytical chemistry and in organic syntheses.
  12. Pharmaceutic aid (alkalizer).

Reactivity Profile

POTASSIUM HYDROXIDE absorbs moisture readily forming caustic solution that attacks aluminum and zinc. A piece of potassium hydroxide causes liquid chlorine dioxide to explode [Mellor 2:289. 1946-47]. 1,2-dichloroethylene and potassium hydroxide forms chloroacetylene, which is explosive and spontaneously flammable in air. Potassium hydroxide is highly toxic [Rutledge 1968. p. 134]. A reaction between n-nitrosomethylurea and potassium hydroxide in n-butyl ether resulted in an explosion due to the formation of diazomethane [Schwab 1972]. Potassium persulfate and a little potassium hydroxide and water ignited a polythene (polyethylene) liner of a container by release of heat and oxygen [MCA Case History 1155. 1955]. Using potassium hydroxide to dry impure tetrahydrofuran, which contains peroxides, may be hazardous. Explosions have occurred in the past. Sodium hydroxide behaves in a similar way as potassium hydroxide [NSC Newsletter Chem. Soc. 1967]. A strong base. Forms caustic solution in water. [Merck 11th ed. 1989].

Air & Water Reactions

Hydrolysis generates enough heat to ignite adjacent combustible material [Haz. Chem. Data 1966]. Dissolves in water (with liberation of heat, may steam and spatter. Solution is basic (alkaline). Deliquescent

General Description

A white solid. Corrosive to metals and tissue. Used in soap manufacture, bleach, as an electrolyte in alkaline batteries, and as a food additive.


Industry Application Role/benefit
Chemical manufacturer Manufacturer of other potassium compounds Precursor/source of potassium
Electrochemistry Manufacture of batteries and fuel cells Electrolyte/ good conductors of electricity
Wet processing of semiconductors Etchant/corrosivity and alkalinity
Biomass fuels Manufacturing biodiesel from oils and fats Catalyst/KOH works well in the manufacture of biodiesel by transesterification of the triglycerides in vegetable oil
Food Rinse or chemical peel for fruits and vegetables Additive in rinse solution/corrosivity and alkalinity
Chocolate,cocoa,soft drink,ice cream,etc. Stabilizer,thickener and pH regulator
Cleaning Manufacture of "potassium soaps" Saponification agent/has better softness and greater solubility than sodium soaps
Industrial cleaners for oven,drain,driveway,concrete,pipe,etc. Additive/alkalinity and good solubility for grease
Liquid soaps, lotions, shampoos, hairsprays, and denture cleaners Additive/helps to increase softness and solubility
Medicine Disbudding calves horns and dissolving scales and hair in veterinary medicine Dissolving solution/good solubility for keratin
Dissolving warts and cuticles in humans
Diagnose fungal infections Diagnose agent
Production of potassium boron hydrogen, spironolactone, progesterone and testosterone propionate, etc. Raw material
Agriculture Potassium fertilizers (potassium phosphate) Raw material/source of potassium
Paper Separation of lignin from cellulose fibers Additive/alkalinity
Dyeing Manufacture of tripolycyanamide dye Raw material
Textile Dyeing, bleaching and mercerizing textiles Additive/corrosivity and alkalinity
Manufacture of artificial fiber and polyester fiber Main raw material
Chemical analysis Titration of acids Titration agent/alkalinity
Others Bleaching textiles Bleaching agent
Absorption of CO2, SO3 and NO3 in gas streams Absorption agent/alkalinity
Absorption of H2O Absorption agent/ hygroscopicity of anhydrous potassium hydroxide

1310-58-3 Well-known Company Product Price

Brand (Code)Product description CAS number Packaging Price Detail
Aldrich (757551)  Potassiumhydroxide  anhydrous, ≥99.97% trace metals basis 1310-58-3 757551-25G 4,747.86CNY Detail
Sigma-Aldrich (417661)  Potassiumhydroxidesolution  45 wt. % in H2O 1310-58-3 417661-18L 5,109.39CNY Detail
Sigma-Aldrich (417661)  Potassiumhydroxidesolution  45 wt. % in H2O 1310-58-3 417661-2L 898.56CNY Detail
Sigma-Aldrich (417661)  Potassiumhydroxidesolution  45 wt. % in H2O 1310-58-3 417661-1L 636.48CNY Detail
Sigma-Aldrich (417661)  Potassiumhydroxidesolution  45 wt. % in H2O 1310-58-3 417661-500ML 445.77CNY Detail
Sigma-Aldrich (P4494)  Potassiumhydroxidesolution  volumetric, 8.0 M KOH (8.0N) 1310-58-3 P4494-50ML 485.55CNY Detail
Vetec (V900796)  Potassiumhydroxide  Vetec reagent grade, ≥85% 1310-58-3 V900796-500G 92.79CNY Detail
Sigma-Aldrich (60377)  Potassiumhydroxide  tested according to Ph.Eur. 1310-58-3 60377-1KG 928.98CNY Detail
Sigma-Aldrich (06005)  Potassiumhydroxide  puriss., meets analytical specification of Ph. Eur., BP, NF, 85-100.5%, pellets 1310-58-3 06005-4X5KG 7,096.05CNY Detail
Sigma-Aldrich (06005)  Potassiumhydroxide  puriss., meets analytical specification of Ph. Eur., BP, NF, 85-100.5%, pellets 1310-58-3 06005-6X1KG 2,523.69CNY Detail
Sigma-Aldrich (06005)  Potassiumhydroxide  puriss., meets analytical specification of Ph. Eur., BP, NF, 85-100.5%, pellets 1310-58-3 06005-5KG 2,691.00CNY Detail
Sigma-Aldrich (06005)  Potassiumhydroxide  puriss., meets analytical specification of Ph. Eur., BP, NF, 85-100.5%, pellets 1310-58-3 06005-1KG 810.81CNY Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017


1.1 GHS Product identifier

Product name potassium hydroxide

1.2 Other means of identification

Product number -
Other names lpotassum hydroxide

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Processing Aids and Additives
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

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