potassium hydroxide

• ChemBase ID: 103899
• Molecular Formular: KO
• Molecular Mass: 55.0977
• Monoisotopic Mass: 54.9586213
• SMILES: [OH-].[K+]
• Canonical SMILES: [OH-].[K+]
• InChI: InChI=1S/K.H2O/h;1H2/q+1;/p-1
• InChIKey: KWYUFKZDYYNOTN-UHFFFAOYSA-M

NAMES AND DATABASE IDS

Names

• IUPAC name: potassium hydroxide; potassium oxidanide
• IUPAC Traditional name: potassium oxidanide; potassium hydroxide; potassium ion OH-
• Synonyms: Potassium hydroxide solution; Potassium hydroxide concentrate; KOH on alumina; Potassium hydroxide on alumina; Potash lye; Potassia; Potassium hydroxide, Acculute Standard Volumetric Solution, Final Concentration 0.1N; Potassium hydroxide, Acculute Standard Volumetric Solution, Final Concentration 1.0N; Potassium hydroxide, Acculute Standard Volumetric Solution, Final Concentration 0.5N; Potassium hydroxide, 0.1N Standardized Solution; Potassium hydroxide, ACS; Potassium hydroxide, 1.0N Standardized Solution; Potassium hydroxide, 0.5N Standardized Solution; Potassium hydroxide, pellets; Potassium hydroxide, flake; Potassium hydroxide solution; Potassium hydroxide hydrate; Kalii hydroxidum; Potassium hydroxide; POTASSIUM HYDROXIDE, U.S.P./N.F.; Caustic Potash; Hydroxyde de Potassium; Lye; Potassium Hydrate; POTASSIUM HYDROXIDE; Potassium hydroxide, 0.1N Standardized Solution in methanol; Potassium hydroxide, 0.5N Standardized Solution in methanol; Potassium hydroxide, 1.0N Standardized Solution in methanol; 氢氧化钾, 可稀释标准标定液, 最终浓度 0.1N; 氢氧化钾, 可稀释标准标定液, 最终浓度 1.0N; 氢氧化钾, 可稀释标准标定液, 最终浓度 0.5N; 氢氧化钾, 0.1N标准溶液; 氢氧化钾, ACS; 氢氧化钾, 1.0N标准溶液; 氢氧化钾, 0.5N标准溶液; 氢氧化钾, pellets; 氢氧化钾,片状; 氢氧化钾 溶液; 氢氧化钾 水合物; 氢氧化钾; 苛性钾; 氢氧化钾; 氢氧化钾, 0.1N甲醇标准溶液; 氢氧化钾, 0.5N甲醇标准溶液; 氢氧化钾, 1.0N甲醇标准溶液

Database IDs

• CAS Number: 1310-58-3
• EC Number: 215-181-3
• MDL Number: MFCD00003553
• Merck Index: 147640
• PubChem SID: 24845893; 24853244; 24858479; 162091518; 24845507; 24859160; 24898243; 24859161; 24861749; 24859162; 24865054; 24859158; 24861752; 24861727; 24863765; 24844923; 24863828; 24861748; 24861751; 24881859; 24859157; 24863763; 24874825; 24844925; 24866171; 24898544; 24871930; 24858472; 24858345; 24881857; 24861750; 24845799; 24898721; 24859159; 24844924; 24861753
• PubChem CID: 14797
• CHEBI ID: 32035
• Chemspider ID: 14113
• Unique Ingredient Identifier: WZH3C48M4T
• Wikipedia Title: Potassium_hydroxide

CALCULATED PROPERTIES

• Acid pKa: 15.7
• H Acceptors: 1
• H Donor: 1
• LogD (pH = 5.5): -0.652
• LogD (pH = 7.4): -0.652
• Log P: -0.652
• Molar Refractivity: 13.9149 cm^3
• Polarizability: 1.1434737 Å^3
• Polar Surface Area: 0.0 Å^2
• Rotatable Bonds: 0
• Lipinski's Rule of Five: true

PROPERTIES

Physical Property

• Solubility: 97 g/100 mL (0 °C) ; 121 g/100 mL (25 °C) ; 178 g/100 mL (100 °C) in water; H2O: soluble1 M at 20 °C, clear, colorless; H2O: soluble1 M, clear, colorless; soluble in alcohol, glycerol ; insoluble in ether, liquid ammonia; Soluble in water, alcohol, and glycerol. Slightly soluble in ether
• Apperance: flakes; Liquid; pellets; Pellets; powder; white pellets; white solid, deliquescent
• Melting Point: ~ 360 °C (680 °F); >300 °C; 360°C; 361 °C(lit.); 406°C
• Boiling Point: ~ 1320 °C (2408 °F) at 760 mmHg; 1320-1324°C; 1327°C
• Flash Point: 11 °C; 12 °C; 14 °C; 51.8 °F; 53.6 °F; 57.2 °F; Non-flammable
• Density: ~1.023 g/mL at 20 °C; 0.81 g/mL at 25 °C; 0.83 g/mL at 25 °C; 0.86 g/mL at 25 °C; 1.000 g/mL at 25 °C; 1.025 g/mL at 25 °C; 1.046 g/mL at 25 °C; 1.087; 1.28; 1.29 g/mL at 20 °C; 1.450 g/mL at 20 °C; 1.456 g/mL at 25 °C; 1.50; 2.044; 2.044 g/cm^3; 2.1 g/cm^3 at 20 °C
• Refractive Index: 1.409; n20/D 1.421
• Vapor Pressure: 1 mmHg ( 719 °C); 2.6664 - 3.9997 hPa at 15.6 °C
• Absorption Wavelength: λ: 240 nm Amax: ≤0.1; λ: 240 nm Amax: 0.1; λ: 260 nm Amax: ≤0.020; λ: 260 nm Amax: 0.020; λ: 280 nm Amax: ≤0.010; λ: 280 nm Amax: 0.010; λ: 290 nm Amax: ≤0.05; λ: 290 nm Amax: 0.05; λ: 300 nm Amax: ≤0.03; λ: 300 nm Amax: 0.03; λ: 310 nm Amax: ≤0.02; λ: 310 nm Amax: 0.02; λ: 500 nm Amax: ≤0.02; λ: 500 nm Amax: 0.02
• pKa: 13.5 (0.1 M)
• Odor: odorless
• Std enthalpy of formation: -425 kJ·mol^-1
• Std molar entropy: 79 J·mol^-1·K^-1

Safety Information

• Storage Condition: Room Temperature (15-30°C), Desiccate
• Storage Warning: Air Sensitive & Hygroscopic
• RTECS: TT2100000
• European Hazard Symbols: Corrosive (C); Corrosive (C); Flammable (F); Harmful (Xn); Toxic (T); X; Irritant (Xi); Harmful (Xn)
• UN Number: 1170; 1219; 1230; 1813; 1814; 1993; 2924; UN1813; UN1814; UN1992; UN3286
• German water hazard class: 1; nwg
• Hazard Class: 3; 8
• Packing Group: 2; 3; II; III
• Australian Hazchem: 2X
• Risk Statements: 11-23/24/25-34-39/23/24/25; 11-23/24/25-35-39/23/24/25; 11-23/24/25-36/38-39/23/24/25; 11-34-52/53; 11-35-52/53; 11-36/38-52/53; 11-36/38-67; 22-35; 34; 35; 36/38; R:22-35; R22, R35
• Safety Statements: 16-26; 16-26-36/37/39-45; 16-26-36/37/39-45-61; 16-26-36/37-45; 16-26-61; 26; 26-36/37/39-45; 26-36/37/39-45-60; 26-37-60; 7-16-26-36/37/39-45; S:26-45-36/37/39; S1/2, S26, S36/37/39, S45
• EU Classification: C10
• EU Hazard Identification Number: 8B
• Emergency Response Guidebook(ERG) Number: 154
• TSCA Listed: 是
• EU Index: 019-002-00-8
• GHS Pictograms: GHS02; GHS05; GHS06; GHS07; GHS08
• GHS Signal Word: Danger; Warning
• NFPA704:
  

  0

  3

  1
• LD50: 273 mg/kg (rat, oral)
• GHS Hazard statements: H225-H301-H311-H314-H331-H370; H225-H301-H311-H315-H319-H331-H370; H225-H311-H331-H315-H319-H370; H225-H311-H331-H370-H314; H225-H311-H331-H370-H314-H303; H225-H314-H412; H225-H315-H319-H336; H225-H315-H319-H412; H302-H314; H314; H314-H302; H314-H303; H315-H319
• GHS Precautionary statements: P210-P260-P280-P301 + P310-P305 + P351 + P338-P310; P210-P260-P280-P301 + P310-P305 + P351 + P338-P311; P210-P261-P305 + P351 + P338; P210-P273-P280-P305 + P351 + P338-P310; P210-P273-P305 + P351 + P338; P210-P303+P361+P353-P305+P351+P338-P361-P405-P501A; P260-P303+P361+P353-P305+P351+P338-P301+P330+P331-P405-P501A; P280-P305 + P351 + P338-P310; P280-P305+P351+P338-P302+P352-P321-P362-P332+P313; P305 + P351 + P338
• Personal Protective Equipment: Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges; Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter; Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter; Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter
• RID/ADR: UN 1170 3/PG 2; UN 1219 3/PG 2; UN 1230 3/PG 2; UN 1813 8/PG 2; UN 1814 8/PG 2; UN 1814 8/PG 3; UN 1993 3/PG 2; UN 2924 3/PG 2

Product Information

• Purity: ~45%; ~45% (T); ≥30% (in water); ≥85%; ≥85% (T); ≥85% KOH basis; ≥85.0%; ≥86% (T); 10% w/v aq. soln.; 28.5%; 28.5%±0.5% (T); 30% w/v aq. soln.; 50% w/v aq. soln.; 85%; 85% min, K2CO3 2.0% max; 85-100.5%; 85-105% (T); 90%; 99.98% (metals basis), 85% min; 99.99% trace metals basis (Purity excludes sodium content.)
• Concentration: 0.02 M in ethanol; 0.0950-0.1050 N (Exact value stated on label); 0.1 M; 0.1 M in ethanol; 0.1 M in isopropanol; 0.1 M KOH (0.1N); 0.1 M KOH in ethanol (0.1N); 0.1 M KOH in H2O (0.1N); 0.1 M KOH in isopropanol (0.1N); 0.1 M KOH in methanol (0.1N); 0.4900-0.5100 N (Exact value stated on label); 0.5 M; 0.5 M in ethanol; 0.5 M KOH (0.5N); 0.5 M KOH in ethanol (0.5N); 0.5 M KOH in methanol (0.5N); 0.950-1.050 N (Exact value stated on label); 1 M; 1 M KOH (1N); 1 M KOH in ethanol (1N); 1 N; 1.0 M KOH (1.0 N); 1.0 M KOH (1.0N); 1.0 M KOH in methanol (1.0N); 1/10 N; 1/2 N; 1/50 N; 45 wt. % in H2O; 5 M; 5 N; 8.0 M KOH (8.0N)
• Grade: ACS reagent; for HPLC; for luminescence; for trace analysis; JIS special grade; NF; Ph Eur; puriss.; puriss. p.a.; purum; purum p.a.; reagent grade; SAJ first grade; semiconductor grade; semiconductor grade PURANAL™ (Honeywell 17851); technical; TraceSELECT®; USP
• Compostion: KOH, >85.0%
• Packaging: pkg of 0.1 mol (5.611 g KOH); pkg of 1.0 mol (56.109 g KOH)
• Suitability: corresponds to standard for RP gradient test; in accordance for filter test; in accordance for luminescence; passes test for filter test
• Impurities: ≤0.0003% total nitrogen (N); ≤0.0005% heavy metals (as Pb); ≤0.0005% Phosphorus (P); ≤0.0005% total nitrogen (N); ≤0.001% heavy metals (as Pb); ≤0.001% N compounds; ≤0.002% heavy metals (as Pb); ≤0.002% Na; ≤0.1% Insoluble matter; ≤0.3% carbonate; ≤0.3% potassium carbonate (K2CO3); ≤0.6% potassium carbonate (K2CO3); ≤0.8% potassium carbonate (K2CO3); ≤1% K2CO3; ≤1.0% K2CO3; ≤2 mg/kg total nitrogen (N); ≤2.0% K2CO3; ≤5 mg/kg total nitrogen (N); 10-15% water; 15% water; ethanol denatured with toluene; insoluble matter, passes filter test; residual solvents, complies; toluene
• Cation Traces: Ag: ≤10 mg/kg; Ag: ≤5 mg/kg; Al: ≤0.0005%; Al: ≤0.05 mg/kg; Al: ≤10 mg/kg; Al: ≤2 mg/kg; Al: ≤20 μg/kg; Al: ≤5 mg/kg; Al: ≤50 mg/kg; As: ≤0.05 mg/kg; As: ≤0.1 mg/kg; As: ≤10 μg/kg; As: ≤3 mg/kg; Ba: ≤1 mg/kg; Ba: ≤5 mg/kg; Ba: ≤50 μg/kg; Bi: ≤5 mg/kg; Ca: ≤0.0005%; Ca: ≤0.005%; Ca: ≤0.5 mg/kg; Ca: ≤10 mg/kg; Ca: ≤100 μg/kg; Ca: ≤20 mg/kg; Ca: ≤5 mg/kg; Ca: ≤50 mg/kg; Cd: ≤0.01 mg/kg; Cd: ≤0.1 mg/kg; Cd: ≤5 mg/kg; Cd: ≤5 μg/kg; Cd: ≤50 mg/kg; Ce: ≤0.01 mg/kg; Co: ≤0.01 mg/kg; Co: ≤10 μg/kg; Co: ≤5 mg/kg; Co: ≤50 mg/kg; Cr: ≤0.01 mg/kg; Cr: ≤10 μg/kg; Cr: ≤5 mg/kg; Cu: ≤0.0005%; Cu: ≤0.01 mg/kg; Cu: ≤1 mg/kg; Cu: ≤20 μg/kg; Cu: ≤5 mg/kg; Cu: ≤50 mg/kg; Eu: ≤0.01 mg/kg; Fe: ≤0.0005%; Fe: ≤0.001%; Fe: ≤0.05 mg/kg; Fe: ≤10 mg/kg; Fe: ≤20 mg/kg; Fe: ≤200 μg/kg; Fe: ≤5 mg/kg; heavy metals (as Pb): ≤0.001%; Hg: ≤0.001 mg/kg; Hg: ≤0.1 mg/kg; Hg: ≤5 μg/kg; La: ≤0.01 mg/kg; Li: ≤0.5 mg/kg; Li: ≤100 μg/kg; Li: ≤5 mg/kg; Mg: ≤0.0005%; Mg: ≤0.002%; Mg: ≤0.1 mg/kg; Mg: ≤5 mg/kg; Mg: ≤50 μg/kg; Mn: ≤0.05 mg/kg; Mn: ≤0.5 mg/kg; Mn: ≤20 μg/kg; Mn: ≤5 mg/kg; Mo: ≤5 mg/kg; Na: ≤0.05%; Na: ≤1%; Na: ≤20 mg/kg; Na: ≤5 mg/kg; Na: ≤5000 mg/kg; Na: ≤5000 μg/kg; NH4+: ≤0.05%; Ni: ≤0.001%; Ni: ≤0.01 mg/kg; Ni: ≤1 mg/kg; Ni: ≤10 mg/kg; Ni: ≤5 mg/kg; Ni: ≤50 μg/kg; Pb: ≤0.001%; Pb: ≤0.01 mg/kg; Pb: ≤1 mg/kg; Pb: ≤10 mg/kg; Pb: ≤10 μg/kg; Pb: ≤5 mg/kg; Sb: ≤0.01 mg/kg; Sb: ≤50 μg/kg; Sc: ≤0.01 mg/kg; Se: ≤0.01 mg/kg; Se: ≤10 μg/kg; Sm: ≤0.01 mg/kg; Sr: ≤0.5 mg/kg; Sr: ≤5 mg/kg; Sr: ≤50 μg/kg; Tl: ≤0.01 mg/kg; Y: ≤0.01 mg/kg; Yb: ≤0.01 mg/kg; Zn: ≤0.0005%; Zn: ≤0.05 mg/kg; Zn: ≤1 mg/kg; Zn: ≤20 μg/kg; Zn: ≤5 mg/kg; Zn: ≤50 mg/kg
• Antion Traces: bromide (Br-): ≤100 μg/kg; carbonate (K2CO3): ≤1000 mg/kg; chloride (Cl-): ≤0.01%; chloride (Cl-): ≤1 mg/kg; chloride (Cl-): ≤10 mg/kg; chloride (Cl-): ≤1000 mg/kg; chloride (Cl-): ≤5 mg/kg; chloride (Cl-): ≤500 μg/kg; fluoride (F-): ≤100 μg/kg; nitrate (NO3-): ≤500 μg/kg; nitrite (NO2-): ≤100 μg/kg; phosphate (PO43-): ≤0.05 mg/kg; phosphate (PO43-): ≤10 mg/kg; phosphate (PO43-): ≤5 mg/kg; phosphate (PO43-): ≤5 ppm; phosphate (PO43-): ≤50 μg/kg; silicate (as SiO2): ≤10 mg/kg; silicate (as SiO2): ≤100 mg/kg; silicate (as SiO2): ≤20 mg/kg; silicate (as SiO2): ≤5 mg/kg; silicate (as SiO2): ≤50 mg/kg; sulfate (SO42-): ≤0.003%; sulfate (SO42-): ≤10 mg/kg; sulfate (SO42-): ≤1000 μg/kg; sulfate (SO42-): ≤20 mg/kg; sulfate (SO42-): ≤30 mg/kg; sulfate (SO42-): ≤5 mg/kg; sulfate (SO42-): ≤50 mg/kg
• Shelf Life: (limited shelf life, expiry date on the label)
• Quality Level: PREMIUM
• Quality: meets analytical specification of Ph. Eur., BP, NF; purified; volumetric
• Factor: 1.000 ±0.001
• λ: 1 M in H2O; in concentrate
• Pharmacopeia: testing & handling conforms to Pharmacopeia
• Product Line: BioUltra; BioXtra
• Linear Formula: KOH; KOH · aq
• Empirical Formula (Hill Notation): HKO

DETAILS

Sigma Aldrich - 720143

Packaging
25, 100 g in glass bottle

Sigma Aldrich - 40216

Legal Information
PURANAL is a trademark of Honeywell Specialty Chemicals Seelze GmbH

Sigma Aldrich - 35116

General description
This material is tested against reference material of NIST/BAM/EMPA.
Visit our Titration Center to learn more.
Packaging
The suffix -VP or -VOLPAC in the product number indicates packaging in 5 or 10 L VOLPAC containers.

Sigma Aldrich - 61699

General description
This certified eluent concentrate for ion chromatography is traceable by potentiometric titration to NIST Standard Reference Material. It is certified in accordance with ISO Guide 31. All details about exact content, uncertainty, traceability and expiry date are described in the certificate.Download at: http://www.sigma-aldrich.com.
Preparation Note
Prepared with potassium hydroxide and high purity water (18.2 MΩ, 0.2 μm filtered)

Sigma Aldrich - 60369

Other Notes
For volumetric analysis. Preparation of standard KOH1

Sigma Aldrich - 319333

General description
Visit our Titration Center to learn more.
Packaging
2 L in poly bottle
500, 6×500 mL in poly bottle

Sigma Aldrich - 319341

General description
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Packaging
2 L in poly bottle
500 mL in poly bottle

Sigma Aldrich - 38073

General description
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concentration after dilution to 1L: 1.0mol/L (1.0N); amount of substance 1.0mol (56.109 g KOH)

Sigma Aldrich - 00648

Application
for flue-gas analysis

Sigma Aldrich - 38070

General description
Visit our Titration Center to learn more.
concentration after dilution to 1L: 0.1mol/L (0.1N); amount of substance 0.1mol (5.611 g KOH)

Sigma Aldrich - 00650

Application
for absorption of carbon dioxide acc. to Knipping

Sigma Aldrich - 221473

Packaging
1, 2.5, 4×2.5 kg in poly bottle
12 kg packaged in open-head fiber drums; 25 g, 500 g, 1 kg, 2.5 kg, 6×500 g packaged in poly bottles
12 kg in fiber drum
25, 500, 6×500 g in poly bottle

Sigma Aldrich - 60370

Other Notes
Reagent for the decomposition of silicates by fusion1,2

Sigma Aldrich - 30603

Packaging
This product is also available in glass bottles.

Sigma Aldrich - 319376

General description
Visit our Titration Center to learn more.
Packaging
2 L in poly bottle
500 mL in poly bottle

Sigma Aldrich - P4494

Packaging
50 mL in poly bottle

Sigma Aldrich - 35127

Caution
Storage is limited. Slight discoloring has no influence on utility.
General description
This material is tested against reference material of NIST/BAM/EMPA
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Sigma Aldrich - 35115

Caution
Storage is limited. Slight discoloring has no influence on utility.
General description
This material is tested against reference material of NIST/BAM/EMPA
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Sigma Aldrich - 417661

Packaging
1, 2 L in poly bottle
18 L in poly drum
500 mL in poly bottle

Sigma Aldrich - 35113

Caution
Storage is limited. Slight discoloring has no influence on utility.
General description
This material is tested against reference material of NIST/BAM/EMPA
Visit our Titration Center to learn more.

Sigma Aldrich - 30955

Legal Information
TraceSELECT is a registered trademark of Sigma-Aldrich Co. LLC

Sigma Aldrich - 00649

Application
for absorption of carbon dioxide acc. to Orsat (in combination with pyrogallol)

Sigma Aldrich - 319368

General description
Visit our Titration Center to learn more.
Packaging
2 L in poly bottle
500 mL in poly bottle

Sigma Aldrich - 306568

Packaging
100, 500 g in poly bottle
Application
In combination with tellurium powder, mediates the quantitative pinacolization of aromatic carbonyl compounds.1

Sigma Aldrich - 35112

Caution
Storage is limited. Slight discoloring has no influence on utility.
General description
This material is tested against reference material of NIST/BAM/EMPA
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Sigma Aldrich - P1767

Packaging
1 kg in poly bottle
2 kg in poly drum
250, 500 g in poly bottle

Sigma Aldrich - 319325

General description
Visit our Titration Center to learn more.
Packaging
2 L in poly bottle
500 mL in poly bottle

Sigma Aldrich - 484016

Packaging
1 kg in poly bottle
10 kg in fiber drum
Application
In combination with tellurium powder, mediates the quantitative pinacolization of aromatic carbonyl compounds.1

Sigma Aldrich - 35125

Caution
Storage is limited
General description
This material is tested against reference material of NIST/BAM/EMPA
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Sigma Aldrich - 319384

General description
Visit our Titration Center to learn more.
Packaging
2 L in poly bottle
500 mL in poly bottle

Sigma Aldrich - 60371

Legal Information
TraceSELECT is a registered trademark of Sigma-Aldrich Co. LLC

Sigma Aldrich - 35008

Application
determination of neutrazilation number (water soluble acids) by color-indicator titration of mineral oils acc. to DIN 51558-1, ANSI/ASTM D 974-64 and IP 139/65
General description
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