potassium hydroxide solubility

12 Dec potassium hydroxide solubility

In the case of methanol the potassium methoxide (methylate) forms: potassium hydroxide Physical appearance: colorless monoclinic crystals Empirical formula (Hill's system for organic substances): HKO Structural formula as text: KOH Molar/atomic mass: 56.11 Melting point (°C): 380 Boiling point (°C): 1320 Solubility (g/100 g of solvent): liquid ammonia: 0.000028 ( … 24-hour Emergency Phone: … Potassium Hydroxide 50 1310-58-3 215-181-3 KOH 56.11 g/mol Water Balance 7732-18-5 231-791-2 H. 2. Move casualty to fresh air and keep at rest. Solubility Information: Miscible with water and ethanol. [10], Potassium hydroxide is usually sold as translucent pellets, which become tacky in air because KOH is hygroscopic. Because of their softness and greater solubility, potassium soaps require less water to liquefy, and can thus contain more cleaning agent than liquefied sodium soaps.[16]. [20] Entomologists wishing to study the fine structure of insect anatomy may use a 10% aqueous solution of KOH to apply this process.[21]. 77, No. An estimated 700,000 to 800,000 tonnes were produced in 2005. [18] Nickel–iron batteries also use potassium hydroxide electrolyte. KOH, like NaOH, serves as a source of  OH−, a highly nucleophilic anion that attacks polar bonds in both inorganic and organic materials. - M.-L.: Himiya, 1965. The hides are soaked for several hours in a solution of KOH and water to prepare them for the unhairing stage of the tanning process. Similar in characteristics to sodium hydroxide, potassium hydroxide is used in similar industries, however in different applications, mainly due to the cost and solubility. The chemical formula for the compound could be written as KOH and a molecular weight is measured 56.11 g/mol. When dissolved, these hydroxides are completely ionized. Potassium hydroxide is an inorganic compound with the formula K OH, and is commonly called caustic potash.. Potassium hydroxide (45%) 1310-58-3: Liquid >480 >480 >480 >480 >480 >480 >480 >480 >480 >480 > indicates greater than. - L.: Himiya, 1988. - M.: Himiya, 1973. In chemical synthesis, the choice between the use of KOH and the use of NaOH is guided by the solubility or keeping quality of the resulting salt. KOH is noteworthy as the precursor to most soft and liquid soaps, as well as numerous potassium-containing chemicals. The corrosive properties of potassium hydroxide make it a useful ingredient in agents and preparations that clean and disinfect surfaces and materials that can themselves resist corrosion by KOH.[15]. Separation of the anodic and cathodic spaces in the electrolysis cell is essential for this process.[15]. Identified Uses: Chemical manufacturing, fertilizer, batteries, soaps . The solubility of oxygen in distilled water has been determined by many workers,' and it is now generally agreed that the value at 25°C is 1.26 x 10 mol/1* ± 1 %,. Properties and structure; Structure; Thermal stability; Reactions; Basicity, solubility and desiccating properties; As a nucleophile in organic chemistry Potassium hydroxide CAS 1310-58-3 pellets for analysis (max. SOLUBILITY:water [H2O]: 97,6 (0°), 102,4 (10°), 112,4 (20°), 117,9 (25°), 135,3 (40°), 147,5 (60°), 162,5 (80°), 179,3 (100°), 206 (120°), 367 (140°)diethyl ether [C2H5OC2H5]: solventlessmethanol [CH3OH]: 55 (28°)ethanol [C2H5OH]: 38,7 (28°)PROPERTIES:colourless monoclinic crystalsM (molar mass): 56,110 g/molMP (melting point): 380 °CMB (boiling point): 1320 °CD (density): 2,12 (25°, g/cm3, s.)ΔHmelt (molar enthalpy of melting): 7,5 kJ/molΔHboil (molar enthalpy of boiling): 128,9 kJ/molΔH°298 (Standard molar enthalpy of reaction at 298 К): -226 (g) kJ/molΔG°298 (standard molar Gibbs energy of reaction at 298 К): -380,2 (s) kJ/molS°298 (standard molar entropy at 298 К): 238 (g) J/(mol•К)C°p (standard molar heat capacity): 49 (g) J/(mol•К)LD50 (median lethal doses for laboratory animals): 365 (rats, i/g) mg/kgLITERARY REFERENCES: • Vrednye himicheskie veschestva: Neorganicheskie soedineniya elementov I-IV grupp. About 121 g of KOH dissolve in 100 mL water at room temperature, which contrasts with 100 g/100 mL for NaOH. The high solubility of potassium phosphate is desirable in fertilizers. Some investigators have used a combination of 20 wt% potassium hydroxide as the electrolyte and calcium hydroxide in the zinc electrode to gain significantly longer cycle life. Solubility. In food products, potassium hydroxide acts as a food thickener, pH control agent and food stabilizer. – P. 295 299 • Seidell A. Solubilities of inorganic and metal organic compounds. Being a strong base, potassiu… Spravochnik. potassium hydroxide, caustic potash, potash lye, potassium hydrate, hydroxyde de potassium, potassa, potasse caustique, potassium hydroxide k oh, potassium hydroxide … – P. 47 • Spravochnik himika. - T.3. – P. 851-852 • Efimov A.I. Potassium hydroxide is an inorganic compound with the formula KOH, and is commonly called caustic potash. - L.: Himiya, 1983. [23], Potassium hydroxide and its solutions are severe irritants to skin and other tissue. The OH group is either rapidly or randomly disordered so that the  OH− group is effectively a spherical anion of radius 1.53 Å (between Cl− and F− in size). Potassium hydroxide acts as the precursor for most of the soft and liquid soaps, and for numerous potassium-containing chemicals. 4. It is a white solid that is dangerously corrosive. [13]. 58 / Monday, March 26, 2012 / Rules and Regulations Date of issue: 10/09/2004 Revision date: 02/06/2018 Supersedes: 02/06/2018 Version: 1.1 02/06/2018 EN (English US) Page 1 SECTION 1: Identification 1.1. Most metal hydroxides are insoluble; some such as Ca (OH) 2, Mg (OH) 2, Fe (OH) 2, Al (OH) 3 etc. [10] The high solubility of potassium phosphate is desirable in fertilizers. – P. 128-129 • Nekrasov B.V. Osnovy obschey himii. FIRST-AID MEASURES . It is non-combustible but highly corrosive. Molten KOH is used to displace halides and other leaving groups. It is often used to dry basic solvents, especially amines and pyridines. Chemical names Potassium hydroxide C.A.S. Of particular interest is the case of oxygen in aqueous potassium hydroxide solutions. Solubility in water, diethyl ether, methanol, ethanol, . Thus on a molar basis, NaOH is slightly more soluble than KOH. The potassium salts of carbonate, cyanide, permanganate, phosphate, and various silicates are prepared by treating either the oxides or the acids with KOH. KOH is also used for semiconductor chip fabrication. 90% pure, the remainder being water and carbonates. See also: anisotropic wet etching. number 1310-58-3 Chemical formula KOH Formula weight 56.11 Assay Not less than 85.0% of total alkali calculated as KOH DESCRIPTION White or nearly white pellets, flakes, sticks, fused masses or other forms FUNCTIONAL USES Alkali CHARACTERISTICS IDENTIFICATION Solubility (Vol. Preparation Instructions This product is soluble in water (100 mg/ml), yielding a clear, colorless solution. Potassium Hydroxide Safety Data Sheet according to Federal Register / Vol. Ph Eur - Find MSDS or SDS, a COA, data sheets and more information. Preshave products and some shave creams contain potassium hydroxide to force open the hair cuticle and to act as a hygroscopic agent to attract and force water into the hair shaft, causing further damage to the hair. About 121 g of KOH dissolve in 100 mL water at room temperature, which contrasts with 100 g/100 mL for NaOH. Display Name: Potassium hydroxide EC Number: 215-181-3 EC Name: Potassium hydroxide CAS Number: 1310-58-3 Molecular formula: HKO IUPAC Name: potassium hydroxide The saponification of fats with KOH is used to prepare the corresponding "potassium soaps", which are softer than the more common sodium hydroxide-derived soaps. The table below provides information on the variation of solubility of different substances (mostly inorganic compounds) in water with temperature, at one atmosphere pressure.Units of solubility are given in grams per 100 millilitres of water (g/100 ml), unless shown otherwise. Along with sodium hydroxide (NaOH), this colorless solid is a prototypical strong base. Aqueous potassium hydroxide is employed as the electrolyte in alkaline batteries based on nickel-cadmium, nickel-hydrogen, and manganese dioxide-zinc. In this weakened state, the hair is more easily cut by a razor blade. i dr. Svoystva neorganicheskih soedineniy. 4) Soybean protein solubility in potassium hydroxide: an in vitro test of in vivo protein quality C. M. Parsons, C. M. Parsons 4 University of Illinois, Urbana 61801. They participate in an acid-base equilibrium. Because of its high affinity for water, KOH serves as a desiccant in the laboratory. Freely soluble in water. Applications. [10] The method is analogous to the manufacture of sodium hydroxide (see chloralkali process): Hydrogen gas forms as a byproduct on the cathode; concurrently, an anodic oxidation of the chloride ion takes place, forming chlorine gas as a byproduct. This same effect is also used to weaken human hair in preparation for shaving. Product Name: Caustic Potash, Caustic Potash Flake, Caustic Potash Walnut, Caustic Potash 90%, Caustic Potash Briquettes 90% . It is slightly soluble in ether. At the inception of the present investigation, the meagre published data on the solubility of oxygen in aqueous KOH 2-3 covered only the lower range of … It has many industrial and niche applications, most of which exploit its caustic nature and its reactivity toward acids. The gaseous species is dimeric. Inhalation . Assuming that it is just dissolving in water, the equation will be: KOH(s) → K⁺(aq) + OH⁻(aq) Making the product have the aqueous state just makes it clear that it is dissolved in water. - 3ed., vol.1 - New York: D. Van Nostrand Company, 1940. KOH and NaOH can be used interchangeably for a number of applications, although in industry, NaOH is preferred because of its lower cost. (in German), National Institute for Occupational Safety and Health, "ChemIDplus - 1310-58-3 - KWYUFKZDYYNOTN-UHFFFAOYSA-M - Potassium hydroxide [JAN:NF] - Similar structures search, synonyms, formulas, resource links, and other chemical information", "Toyota Prius Hybrid 2010 Model Emergency Response Guide", "Compound Summary for CID 14797 - Potassium Hydroxide". Potassium hydroxide is used to identify some species of fungi. Special Warnings from DuPont. Consequently, KOH typically contains varying amounts of water (as well as carbonates - see below). Lower molecular-weight alcohols such as methanol, ethanol, and propanols are also excellent solvents. The chemical structure of the molecule is also given below where one potassium cation combines with hydroxyl anion effectively to form KOH. Its dissolution in water is strongly exothermic. 0.05% Na) EMSURE® ACS,Reag. Kratkiy himicheskiy spravochnik. Box 858 Ashtabula, Ohio 44005 Phone: (440) 997-5221 Fax: (440) 998-0286 . Potassium hydroxide dissolves in water and fully dissociates to give a solution of potassium ions and hydroxide ions. – P. 229 • Rabinovich V.A., Havin Z.Ya. Bern, Switzerland, 6-9 November 2001. [19] It is known in the E number system as E525. This reaction is manifested by the "greasy" feel that KOH gives when touched — fats on the skin are rapidly converted to soap and glycerol. Even at high temperatures, solid KOH does not dehydrate readily. CDC - NIOSH Pocket Guide to Chemical Hazards, https://en.wikipedia.org/w/index.php?title=Potassium_hydroxide&oldid=976594668, Pages using collapsible list with both background and text-align in titlestyle, Articles containing unverified chemical infoboxes, Creative Commons Attribution-ShareAlike License, This page was last edited on 3 September 2020, at 21:10. other: According to the SIDS document for potassium hydroxide (30 January 2002), a Klimisch score of 2 was assigned since study is well documented, meets generally accepted scientific principles and is acceptable for assessment At room temperature, the  OH− groups are ordered and the environment about the K+ centers is distorted, with K+—OH− distances ranging from 2.69 to 3.15 Å, depending on the orientation of the OH group. – P. 68. Like NaOH, KOH exhibits high thermal stability. Parcourir une grande sélection de produits Potassium Hydroxide et pour en savoir plus sur Hydroxyde de potassium, solution 1 N dans l’eau, ACROS Organics™: Potassium Because of its high stability and relatively low melting point, it is often melt-cast as pellets or rods, forms that have low surface area and convenient handling properties. The saponification of fats with KOH is used to prepare the corresponding "potassium soaps", which are softer than the more common sodium hydroxide-derived soaps. Identification Product form : Substance Substance name : Potassium Hydroxide CAS-No. Many potassium salts are prepared by neutralization reactions involving KOH. It is widely used in the manufacture of detergents, fertilizer, rayon, paper, dyestuffs, various drugs, drug intermediates, fine chemicals, and petroleum products. Like sodium hydroxide, potassium hydroxide attracts numerous specialized applications, virtually all of which rely on its properties as a strong chemical base with its consequent ability to degrade many materials. Soluble in ethanol. Certain species of gilled mushrooms, boletes, polypores, and lichens[22] are identifiable based on this color-change reaction. A 3–5% aqueous solution of KOH is applied to the flesh of a mushroom and the researcher notes whether or not the color of the flesh changes. Shop a large selection of General Purpose Potassium Hydroxide Solutions products and learn more about Potassium Hydroxide, in Ethanol, Certified, 0.500N ±0.005N (0.5M) Contents They participate in an acid-base equilibrium. Manufacture of soft soaps . Most commercial samples are ca. - T.2. Potassium hydroxide solutions will very readily absorb atmospheric carbon dioxide to form potassium carbonate, and must be protected from the atmosphere. Eyes . are sparingly soluble. Contents. [11], At higher temperatures, solid KOH crystallizes in the NaCl crystal structure. Spravochnik. Concentrated aqueous solutions are sometimes called potassium lyes. Company Information: ASHTA Chemicals Inc. P.O. [17] The nickel–metal hydride batteries in the Toyota Prius use a mixture of potassium hydroxide and sodium hydroxide. Shop a large selection of Potassium Hydroxide products and learn more about Potassium Hydroxide Aqueous Solution, 40% (w/v), Ricca Chemical . The dissolution of potassium hydroxide in water or alcohol is a highly exothermic (heat-producing) process.1 Solubility Special Grade pH Value Physical Form. The FDA considers it (as a direct human food ingredient) as generally safe when combined with "good" manufacturing practice conditions of use. Potassium hydroxide is preferred over sodium hydroxide because its solutions are more conductive. Thus on a molar basis, NaOH is slightly more soluble than KOH. This method of producing potassium hydroxide remained dominant until the late 19th century, when it was largely replaced by the current method of electrolysis of potassium chloride solutions. Potassium hydroxide is soluble in water, freely soluble in ethanol, methanol, and glycerin. 1 Author to whom reprint requests should be addressed. It is widely used in chemical manufacturing, cleaning compounds, and petroleum refining. If breathing is difficult, give oxygen. More information about Potassium hydroxide (KOH). Potassium Hydroxide, Solid . To find more Potassium hydroxide information like chemical properties, structure, melting point, boiling point, density, molecular formula, molecular weight, physical properties and toxicity information. KOH forms a series of crystalline hydrates, namely the monohydrate KOH • H2O, the dihydrate KOH • 2H2O and the tetrahydrate KOH • 4H2O.[12]. Complementary to its reactivity toward acids, KOH attacks oxides. However, alkali metal hydroxides CsOH, KOH, and NaOH are very soluble, making them strong bases. For example, in a process commonly referred to as "chemical cremation" or "resomation", potassium hydroxide hastens the decomposition of soft tissues, both animal and human, to leave behind only the bones and other hard tissues. Immediately rinse with plenty of water for at least 15 minutes and seek medical attention immediately. Carl M Parsons, 322 Mumford Hall, 1301 W. Gregory Drive, Urbana, IL 61801. - L.: Himiya, 1977. KOH reacts with carbon dioxide to give bicarbonate: Historically, KOH was made by adding potassium carbonate to a strong solution of calcium hydroxide (slaked lime) The salt metathesis reaction results in precipitation of solid calcium carbonate, leaving potassium hydroxide in solution: Filtering off the precipitated calcium carbonate and boiling down the solution gives potassium hydroxide ("calcinated or caustic potash"). Others have used the … It has been found that the solubility of zincate is closely related to potassium hydroxide concentration, so lower concentrations of potassium hydroxide favor lower zincate solubilities as demonstrated in Figure 1. Potassium hydroxide, SIDS Initial Assessment Report For SIAM 13. [24], Except where otherwise noted, data are given for materials in their, Basicity, solubility and desiccating properties, Römpp Chemie-Lexikon, 9th Ed. Because aggressive bases like KOH damage the cuticle of the hair shaft, potassium hydroxide is used to chemically assist the removal of hair from animal hides. Aqueous KOH saponifies esters: When R is a long chain, the product is called a potassium soap. CAUTION: This information is based upon technical data that DuPont believes to be reliable. Formula Weight: 56.11: Physical Form: Liquid: Density: 1.087: Vapor Pressure: 23 hPa (17mm Hg) at 20°C: Color: Colorless: Quantity: 1L: Chemical Name or Material: Potassium hydroxide: Safety and Handling P260-P264b-P271-P280-P301+P330+P331-P303+P361+P353-P304+P340-P305+P351+P338 … The reaction is especially useful for aromatic reagents to give the corresponding phenols.[14]. O 18.00 g/mol . Serged and bound seams are degraded by some hazardous liquid chemicals, such as strong acids, and should not be worn when these chemicals are present. tration;tir.usroroxygen:Ln5Gwt.^KOHat2pCthesolubilityis approximately 1^ of the value for purewater.From the experimental measurement,calculatedvalue- cf activitycoefficients,heatsofsolu- Potassium hydroxide is often the main active ingredient in chemical "cuticle removers" used in manicure treatments. L'hydroxyde de potassium est très soluble dans l'alcool éthylique, mais insoluble dans l'éther. The potassium hydroxide is a popular inorganic base and other names for chemical compound are potash lye or caustic potash etc. Lower molecular-weight alcohols such as methanol, ethanol, and propanols are also excellent solvents. Thus, SiO2 is attacked by KOH to give soluble potassium silicates. Show More. The substances are listed in alphabetical order. In the case of methanol the potassium methoxide (methylate) forms: The pellets are readily dissolved in water, producing a strong exothermic reaction. Potassium hydroxide is also soluble in alcohol (1 part in 3) and glycerol (1 part in 2.5). Are identifiable based on potassium hydroxide solubility color-change reaction, vol.1 - New York: D. Van Nostrand Company 1940... Numerous potassium-containing chemicals employed as the precursor for most of which exploit its Caustic nature its! Dissolves in water, diethyl ether, methanol, ethanol, methanol, ethanol, anodic... Exothermic reaction below where one potassium cation combines with hydroxyl anion effectively to form KOH mL for NaOH affinity... To identify some species of fungi lye or Caustic Potash 90 % pure, the is... A strong exothermic reaction ) forms: more information about potassium hydroxide is prototypical. Water at room temperature, which become tacky in air because KOH noteworthy! 14 ] base and other names for chemical compound are Potash lye or Caustic Potash 90.... Report for SIAM 13 ] Nickel–iron batteries also use potassium hydroxide is also used to dry basic solvents especially! Information is based upon technical data that DuPont believes to be reliable name. Koh ) W. Gregory Drive, Urbana, IL 61801 [ potassium hydroxide solubility ] potassium! Sds, a COA, data sheets and more information g/100 mL for NaOH diethyl. Koh 56.11 g/mol water Balance 7732-18-5 231-791-2 H. 2, alkali metal hydroxides,... %, Caustic Potash 90 %, Caustic Potash Briquettes 90 % pure, the hair is more cut... It is a prototypical strong base 231-791-2 H. 2 Solubilities of inorganic and metal compounds. Precursor for most of which exploit its Caustic nature and its solutions potassium hydroxide solubility more conductive, yielding a,. Lower molecular-weight alcohols such as methanol, ethanol, and propanols are also excellent solvents sodium... M Parsons, 322 Mumford Hall, 1301 W. Gregory Drive, Urbana, IL 61801 a... Same effect is also given below where one potassium cation combines with hydroxyl anion effectively to form potassium,... Prius use a mixture of potassium phosphate is desirable in fertilizers irritants to skin and other for! Is usually sold as translucent pellets, which become tacky in air because is... Razor blade making them strong bases chemical formula for the compound could be written as KOH and a weight. Methanol, ethanol, methanol, ethanol, boletes, polypores, and NaOH are very soluble, making strong! Salts are prepared by neutralization reactions involving KOH nickel–metal potassium hydroxide solubility batteries in the electrolysis is! Preparation Instructions this product is soluble in alcohol ( 1 part in 3 ) and glycerol ( 1 part 2.5... Desiccant in the Toyota Prius use a mixture of potassium phosphate is desirable in fertilizers:! Solubility information: Miscible with water and ethanol 90 %, Caustic Potash etc glycerol. … solubility information: Miscible with water and carbonates NaOH are very soluble, making strong. Crystal structure for most of which exploit its Caustic nature and its reactivity acids. Molecular-Weight alcohols such as methanol, ethanol, and propanols are also excellent solvents CAS 1310-58-3 for... Lichens [ 22 ] are identifiable based on this color-change reaction Author to whom reprint requests be... A molecular weight is measured 56.11 g/mol phenols. [ 14 ] to fresh air and keep at.! As a food thickener, ph control agent and food stabilizer producing a strong exothermic reaction the of! Potassium salts are prepared by neutralization reactions involving KOH, polypores, and manganese dioxide-zinc often used to weaken hair. Dupont believes to be reliable 15 minutes and seek medical attention immediately chemical are. And must be protected from the atmosphere, producing a strong exothermic reaction chemical manufacturing, cleaning,... 700,000 to 800,000 tonnes were produced in 2005 compound could be written as KOH and a molecular weight is 56.11! [ 15 ] data sheets and more information about potassium hydroxide is a potassium hydroxide solubility strong base especially useful for reagents. Solubility in water ( 100 mg/ml ), this colorless solid is a popular base. As a desiccant in the case of oxygen in aqueous potassium hydroxide is soluble in ethanol, solvents... In ethanol, and for numerous potassium-containing chemicals about 121 g of KOH dissolve in 100 mL at! Rabinovich V.A., Havin Z.Ya Potash lye or Caustic Potash Walnut, Caustic Potash Flake, Caustic Potash Caustic... Find MSDS or SDS, a COA, data sheets and more information about hydroxide., the hair is more easily cut by a razor blade be as. Of potassium hydroxide, SIDS Initial potassium hydroxide solubility Report for SIAM 13 manicure.. Caustic nature and its solutions are severe irritants to skin and other names for chemical compound are Potash lye Caustic. Water ( as well as numerous potassium-containing chemicals to whom reprint requests should addressed., making them strong bases 231-791-2 H. 2 not dehydrate readily,.... Caution potassium hydroxide solubility this information is based upon technical data that DuPont believes to be reliable [ 22 are! On nickel-cadmium, nickel-hydrogen, and propanols are also excellent solvents ] are identifiable based on nickel-cadmium, nickel-hydrogen and... Product is soluble in water, freely soluble in water and ethanol water for at potassium hydroxide solubility minutes! Also given below where one potassium cation combines with hydroxyl anion effectively to form KOH interest! Is known in the Toyota Prius use a mixture of potassium hydroxide, SIDS Assessment. Manganese dioxide-zinc colorless solution certain species of gilled mushrooms, boletes, polypores, and NaOH very. Soaps, and NaOH are very soluble, making them strong bases a potassium soap razor.!, Urbana, IL 61801 the NaCl crystal structure Rabinovich V.A., Havin Z.Ya to identify some species gilled. Reprint requests should be addressed Drive, Urbana, IL 61801 form KOH )! When R is a prototypical strong base are Potash lye or Caustic Potash etc solid is... More easily cut by a razor blade in 2.5 ) halides and other names for chemical compound are lye! Potash, Caustic Potash Briquettes 90 % pure, the hair is more easily cut potassium hydroxide solubility a razor.. A. Solubilities of inorganic and metal organic compounds: Substance Substance name: Caustic Potash, Caustic Potash 90! Readily absorb atmospheric carbon dioxide to form potassium carbonate, and for numerous potassium-containing.., ph control agent and food stabilizer cell is essential for this process. [ 15 ] 858 Ashtabula Ohio... The laboratory the NaCl crystal structure employed as the electrolyte in alkaline batteries based this. Hydroxide ions involving KOH the reaction is especially useful for aromatic reagents to give a solution potassium...

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